FB series setting input type event control PID and communication

The settings of the FB series universal process & temperature controller are easiest to configure using the COM-KG configuration tool in combination with PROTEM2 software (also includes trending function graph for PID control optimization).

This online instruction with short instructional video’s describes how to set these parameters manually using the controller display.

It also contains a short description of each of the discussed parameters.

– Brochure FB100 serie
– Brochure FB400/900 series
Instruction Manual FB series

RKC FB series
advanced process & temperature controller

Explanation of the keys on the front of the FB controller

As an example the FB100 is shown, the other larger versions of the FB series are similar in operation.

In this online instruction we will make use of the 4 lower buttons for making changes in the settings of the controller:

  • <MODE key: the blinking digit indicates which digit can be set. The blinking digit can be moved to another position by pressing the <MODE key.
  • \/ and /\ keys: used for decreasing or increasing the value of the blinking digit
  • SET key: the data that has been changed with the \/ and /\ keys is not stored yet. In order to do so, push the SET key within 1 minute after changing the value. The new value will then be saved and the display will move to the next parameter.

Example: change the input type to thermocouple type K 0-400°C

After switching the controller to stop (otherwise engineering parameters cannot be changed) the measurement input type (controller parameter group F21) can be set. This procedure is also described in 7.5.3 engineering setting item in the instruction manual.

Setting procedure for F21 measurement input type
  • Stop the controller by pushing the <MODE key for more than 2 seconds
  • ARU (auto tuning) appears, press the <MODE key
  • STU (startup tuning) appears, press the <MODE key
  • A-n (auto/manual) appears, press the <MODE key
  • L-E (local/remote) appears, press the <MODE key
  • r-S (run/stop) appears. When the controller is running (indicating rUn) you need to use the /\ key to switch the controller to stop mode. Now SToP will be indicated by the controller.
  • Push both the SET and <MODE keys together for more than 2 seconds to enter the engineering setting menu F10
  • Push the /\ key until you reach F21 (the parameter for setting the input type)
  • Press SET: InP appears. For thermocouple type K, select 0000 (for other types, see table below)
  • Push SET to store selection. Other parameters appear.
  • UnIT: used to select the temperature unit for the thermocouple and RTD inputs:
    • 0: °C (default value)
    • 1: °F
  • PGdP: the number of decimals behind the comma:
    • 0: none (default value)
    • 1: one decimal place
    • 2: two decimal places
    • 3: three decimal places
    • 4: four decimal places

TC input: K, J, E: only 0 or 1 can be set.
TC input: T, U, L: only 1 can be set
other than the above: only 0 can be set
RTD input: 0, 1 or 2 can be set
Voltage (V)/Current (I) inputs: 0, 1, 2, 3 or 4 can be set.

  • PGSH/PGSL: input scale high limit (maximum value of measurement range) and input scale low limit (minimum value of measurement range):
  • PoV/PUn: input error determination point high/low: if the measured value (PV) is above the input error determination point high or below the input error determination point low, an action (high) at input error or action (low) at input error will be taken.
Example: when input scale range is -200 to +1372°C
  • BoS: Sensor burnout selection.
    • 0: (default value): measured value goes to upscale: measurement moves to maximum value in case of open connection. Preferred at heating process (heating switches off when thermocouple breaks).
    • 1: measured value goes to downscale: measurement moves to minimum value in case of open connection.

Note: this setting is only used for thermocouple or voltage (low) inputs.

For the following types of input, the action when an input break occurs is fixed, regardless of the burnout direction setting:

    • RTD input: upscale
    • Voltage (high) input: downscale (display of about 0V)
    • Current input: downscale (display of about 0mA)
  • S9r: square root extraction. Use this setting when you want to receive an input signal directly from a flowmeter with a differential pressure measurement signal.
    • 0: unused (default setting)
    • 1: use square root extraction
  • PFr9: power supply frequency. This setting is to prevent flickering of the display. Set this to the power frequency of your network:
    • 0: 50Hz (default value)
    • 1: 60Hz
  • SAP: measurement input sample time:
    • 0: 50ms
    • 1: 100ms (default value)
    • 2: 250ms

After pushing SET again in SAP the display returns to the start of the F21 parameter list.

Returning to normal operating display
  • Push SET and <MODE at the same time to return to normal operation. You can also wait until the controller automatically returns to the normal operation display.
  • Don’t forget to switch the temperature controller in run mode by pressing the <MODE key for a few seconds, push SET until r-S (run/stop) appears and put the controller in RUN mode by pushing the \/ (down) key. The controller will show that it is in rUn (running) mode again.
measurement input type F21
Possible input type selections with their ranges
types of thermocouple and RTD/Pt100 input in °C or °F and voltage/current inputs
  • The Voltage (low) or (high) input group is selected by the input select switch (for measured input) at the side of the instrument. Use a small screwdriver for changing the setting.
FB hardware selection
  • do not set to any number that is not in this table, incl. 23 & 24. This may cause malfunction
  • If the input type is changed, the decimal point position, the input scale high and the input scale low are initialized to their default values corresponding the selection
instruction video on how to change the measurement input type

Example: change the event type to deviation low (2) for a burner heat demand (HD) signal

  • Most burners need a hardware start signal that will start the safety pre-flush procedure and initiates an ignition attempt followed with a flame detection, before actually starting the main burner. After that modulation can take place with a high/low or analog (0-100%) modulation signal.
  • For this a hardware potential free relay contact is needed that closes when the desired temperature is above the actual temperature. This way the burner also automatically stops when the temperature is higher than the desired value.
  • The following procedure will describe on how to configure event 1 in parameter group F41 to make such a heat demand signal. Event 1 will drive the DO1 relay contact on the RB controller.
  • Don’t forget to order the DO1 output option when ordering the controller.
Setting procedure for F41 event 1 configuration
  • Stop the controller by pushing the <MODE key for more than 2 seconds
  • ARU (auto tuning) appears, press the <MODE key
  • STU (startup tuning) appears, press the <MODE key
  • A-n (auto/manual) appears, press the <MODE key
  • L-E (local/remote) appears, press the <MODE key
  • r-S (run/stop) appears. When the controller is running (indicating rUn) you need to use the /\ key to switch the controller to stop mode. Now SToP will be indicated by the controller.
  • Push both the SET and <MODE keys together for more than 2 seconds to enter the engineering setting menu F10
  • Push the /\ key until you reach F41 (the parameter for configuring event 1 type)
  • Press SET: ES1 event setting 1 appears. For a heat demand signal we need a deviation low alarm: 0002 (for other types, see table below). With this event type deviation low, the temperature difference between the measured value PV and the desired setvalue SV are used for driving event 1. When the measured temperature is below the desired temperature, the event 1 is activated which in turn will activate relay contact DO1.
  • Push SET to store selection. Other parameters appear.
  • EHo1: the event hold action: for a heat-demand HD signal use 0000 (no hold)
  • E1L1: event 1 interlock. When an event occurs, it can be latched to enable to park the heating process for safety reasons. This can only be reset by power cycling the controller, or via the communication. For a heat demand HD signal: set to 0 (not latching). For a maximum temperature alarm: set to 1 (event latching) to prevent switching off when a maximum temperature had been reached.
  • EH1: event 1 differential gap. This parameter is a small temperature range around the event temperature switchpoint that will act as a hysteresis to prevent too often on/off switching of the event. Set to 0 (0°C) for switching without hysteresis. It is advised to allow for a small 1-2°C hysteresis so the DO1 relay does not switch too often. Default setting is 2°C.
  • EVT1: event 1 timer. With this time you can delay the switching of the event 1 and DO1 relay contact. For a normal heat demand HD signal: set it to 0 seconds.
  • EEo1: with this  bit code parameter you can let the controller switch the event 1 output DO1 (forced) on in certain operating conditions. The default value is 0000: DO1 event output only controlled by the event.
  • Each bit in the 4 digit code represents if the function is on (1) of off (0)
  • ###1: event 1 output DO1 on at input error
  • ##1#: event 1 output DO1 on in manual mode
  • #1##: event 1 output DO1 on during autotuning (AT)
  • 1###: event 1 output DO1 on during ramp up/down (setting change limiter not equal to 0)

After pushing SET again in EEo1 the display returns to the start of the F parameter list.

Since the event settings have lots of possibilities, we advise you to read the chapter for function block F41: event 1, F42: event 2, F43: event 2 and F44: event 4 in the instruction manual. This describes each setting in more detail. See chapter 7-5.

Returning to normal operating display
  • Push SET and <MODE at the same time to return to normal operation. You can also wait until the controller automatically returns to the normal operation display.
  • Don’t forget to switch the temperature controller in run mode by pressing the <MODE key for a few seconds, push SET until r-S (run/stop) appears and put the controller in RUN mode by pushing the \/ (down) key. The controller will show that it is in rUn (running) mode again.
Event 1 / DO1 alarm output configuration
Possible event type selections
Event type configurations
  • Select 2: deviation low for a burner heat demand HD signal
  • Select 5: process high for a maximum temperature alarm
Don't forget to set the event 1 setvalue (alarm switchpoint) from 50°C (default value) to 0°C

After changing the event type in F41, the event 1 setvalue (the actual temperature switchpoint of the alarm) is always set to a default value of 50.0 °C. This is the value to determine of the event is active or not. In case of a deviation low alarm, the difference between PV (measured value) and SV (desired value) must exceed this value (in this case, 50.0 °C) in order to activate the event 1 / DO1 relay contact.

Since we want a heat demand HD signal for a burner, we need to change this default value of 50.0 °C back to 0.0 °C, so the burner switches on when the measured temperature is lower than the desired value (and vice versa).

For a maximum temperature alarm, you need to set the actual maximum allowed temperature with this same event 1 setvalue value. Don’t forget to set the F41: E1L1 event 1 interlock to 1 (interlock active) for a maximum temperature alarm, this way the heating process is switched off at maximum temperature. This interlock can only be reset by power-cycling the controller, or sending a command via the ModBUS communcation.

First return to normal operation
  • Push SET and <MODE at the same time to return to normal operation. You can also wait until the controller automatically returns to the normal operation display.
  • Don’t forget to switch the temperature controller in run mode by pressing the <MODE key for a few seconds, push SET until r-S (run/stop) appears and put the controller in RUN mode by pushing the \/ (down) key. The controller will show that it is in rUn (running) mode again.
  • On the main operation screen: push SET for more than 2 seconds
  • EV1 event 1 setvalue will now appear: change the default value of 50.0 °C to 0.0 °C and push SET.
  • Keep SET pushed for more and 2 seconds and the normal operation display appears. The event 1 setvalue is now correctly set to 0.0 °C for a heat demand HD signal that controls the burner.

Note: the event setvalue can be set with a FB temperature controller in run status.

Important remarks on event 1 / DO1 relay contact maximum voltage/current switching capacity

Important note: please note, that the event 1 / DO1 relay will only switch on with the controller in run mode, so in stop mode the event 1 does not occur, and the DO 1 relay remains off.

You can also verify the event 1 / DO1 operation by watching the orange led above the DO1 indicator on the display.

Important note on the relay contacts. These are rated max. 250Vac 1A and max. 30Vdc 1A. It is strongly advised to use extra interface relays driven by the relays inside the FB controller. This increases the limetime of the FB relays and the controller as a whole significantly. 

DO1 status light indicates status of event 1 and relay
Analog modulation signal for burner control

Please note, that for a modulating burner control you need, besides this heat demand HD signal, also the analog modulation signal of the PID controller. For this the 2nd analog output (AO on the output terminals of the controller) retransmission is used for sending the control output of the PID controller to the burner modulating analog input.

See the parameter group F33 for setting the 2nd analog output AO.

Please note, that this 2nd analog output is optional and must be selected when ordering the FB controller.

Instruction video for configuration of the event / alarm type for burner control

Example: set the control action for a heating or cooling process

We have 2 ways of temperature process control:

  • indirect control: when the measured temperature rises, we must reduce the output signal that drives the heating of a process. This is often a process that drives an electrical heater with a temperature measurement as feedback.
  • direct control: when the measured temperature rises, we must increase the output signal that drives the cooling of a process (i.e. the cooling generator must run faster in order to lower the temperature). This is a cooling process where the controller drives the cooling with a temperature measurement as feedback.

Parameter group F51 is used for setting the control behaviour of the temperature controller. 

Note: a FB controller for a both heating/cooling process can also be used. Specify this at ordering the FB controller, since the hardware adjustment parameters must be set correctly for this kind of control.

With the optional Output 2 (OUT2) controller output, a heat/cool PID and position proportioning PID control (for 2-point motor valve control) can be set.

Setting procedure for F51 control action configuration
  • Stop the controller by pushing the <MODE key for more than 2 seconds
  • ARU (auto tuning) appears, press the <MODE key
  • STU (startup tuning) appears, press the <MODE key
  • A-n (auto/manual) appears, press the <MODE key
  • L-E (local/remote) appears, press the <MODE key
  • r-S (run/stop) appears. When the controller is running (indicating rUn) you need to use the /\ key to switch the controller to stop mode. Now SToP will be indicated by the controller.
  • Push both the SET and <MODE keys together for more than 2 seconds to enter the engineering setting menu F10
  • Push the /\ key until you reach F51 (the parameter group for configuring the control action)
  • Press SET: oS control action appears, this is the parameter that sets the control action to direct (0) for a cooling process, or indirect (0001) for a heating process. Furthermore, there are more settings possible for the type of control used (option must be ordered and present at the FB controller):
  • Push SET to store selection. Other parameters appear.
  • IddP: integral/derivative time decimal point position (this parameter is automatically set when changing the decimal point of the input type in parameter group F21)
    • 0: 1 second (default setting: no decimal point)
    • 1: 0.1 second setting (1 decimal point) 
  • dGA: with this parameter a gain for the PID derivative action can be set. In normal operation the derivative gain should not be set. Default value is 6.0.
  • oHH: on/off action differential gap upper side in °C.
  • oHL: on/off action differential gap lower side in °C.
  • AoVE/AUnE: used to set the action to be taken when the measured value reaches the input determination point high or low.
    • 0: continue with normal control (default value). This is normally ok: with broken thermocouple the measured value goes to a maximum, causes the controller output to go to 0% 
    • 1: set controller output to the value set in parameter manipulated output value at input error (next parameter)
  • PSA: manipulated output value at input error (used when previous parameter is set to 1). Default value is 0.0%
  • rAV1/rAV2: manipulated output value (MV1/MV2) when controller is in stop mode. Default value is -5.0%
  • orU/orD/orU2/orD2: output change rate limiter up/down for MV1/2. This setting limits the variation of the control output 1 (MV1) or 2 (MV2) per second to prevent sudden changes in output. Default value is 0.0 (disabled, value immediately follows calculated PID output)
  • oLH/oLL/oLH2/oLL2: output limiter high/low for MV1/2. This value limits control output 1 (MV1) or 2 (MV2) to a maximum value (default setting 105.0%) or minimum value (default setting -5.0%)
  • PFF: power feed forward selection: this is used for compensating for power fluctuations, for this the optional power feed forward measurement input for the power feed forward transformer is necessary.
    • 0: unused
    • 1: used (default setting)
  • PFFS: power feed forward gain. This parameter is used to tune the amount of compensation at power fluctuations. The default setting is 1.00.
  • dRP: derivative action. This parameter selects the deviation used by the PID controller. Either based on the difference between the PV (measured value) and the SV (setvalue), or changes in the increase or decrease of the deviation between PV (measured value) and SV (desired value). Finetuning parameter for fast changing processes:
    • 0: measured value derivative (default setting)
    • 1: deviation derivative
  • US: undershoot suppression factor. This factor is used to suppress undershoot on the cool-side of the controller. Default value is:
    • water cooling: 0.100
    • air cooling: 0.250
    • cooling gain linear type: 1.000
  • dbPA: overlap/deadband reference point. This is only for heat/cool control.  With this parameter the switchover from heating to cooling (and vice versa) can be tuned and adjusted. Default setting is 0.0 (no overlap between heating/cooling band.

After pushing SET again on dbPA, the display returns to the the F parameter list.

For more details we advise you to consult the instruction manual detailed description of function block 51 in chapter 7.5.

Returning to normal operating display
  • Push SET and <MODE at the same time to return to normal operation. You can also wait until the controller automatically returns to the normal operation display.
  • Don’t forget to switch the temperature controller in run mode by pressing the <MODE key for a few seconds, push SET until r-S (run/stop) appears and put the controller in RUN mode by pushing the \/ (down) key. The controller will show that it is in rUn (running) mode again.
Control action settings F51

Example: changing PID settings and adjusting control behaviour

  • The PID (proportional, integral and differential) settings are used to finetune the control response of the PID controller at variations between the PV measured value and the SV desired values. 
  • Good finetuning of these parameters results in a process with less over/undershoot.
  • AT autotuning can also be used when your process allows it to test without damage because of the fully on (100%) and off (0%) state of the control output, which is cycled a few times to determine the calculated PID settings because of the process response.
  • Further manual PID tuning can be necessary after an autotuning procedure in order to obtain the best possible results.

The PID settings can be changed with the controller in run mode.

Note: consult chapter 7.3.1 parameter setting mode in the instruction manual for further details on the function of each parameter.

Accessing the PID settings of the controller from the normal operating display

Note: the following list contains various parameters that are dependent on the options that you ordered with the controller. Because of this certain parameters described below will not show on your specific controller.

Push SET for more than 2 seconds. EV1 (event 1 switchpoint temperature) will appear, depending on the options, a number of 0 up to 4 events can installed in the FB controller . Push SET again and the following parameter (proportional band) appears

Note: each next parameter can be accessed by pushing the SET button.

Settings for control loop break (sensor) alarm (optional: must be specified at ordering)

The following parameters are for the control loop break alarm detection. 

  • LbA: time setting in seconds for the control loop break alarm (when present). The control loop break alarm is used to detect a:
    • load (heater) break
    • failure in external actuator (power controller, electromagnetic relay etc.)
    • failure with with the input (sensor) break.

The LBA alarm function is activated when the control output MV reaches:

    • 0% (or low limit with limit function)
    • 100% (or high limit with limit function).

LBA monitors the variation of the measured value (PV) for the length of the set LBA time in this parameter. When the LBA time has elapsed and the PV is still within the alarm determination range, the LBA alarm will be on. The default value is 480 seconds.

  • Lbd: loop break alarm deadband in °C around the setvalue (when present). Because of external disturbances the control loop break alarm can give false alarms. To prevent this a band in °C around the desired temperature (setvalue SV) can be set to prevent this LBA alarm to occur. Default value is 0°C (no deadband)
PID settings for control behaviour
  • P: the proportional band of the controller (heat-side) in °C. This is the temperature band around the setvalue where the output value is modulated from 0 to 100%.
  • I: integral time in seconds. This action integrates the difference between PV measured value and SV desired value over time, and slowly takes the difference between the PV and SV away. Normally this is the delay time of the process (response time) that must be set here.
  • d: derivative time in seconds. This is used for the control behaviour when sudden changes between the PV measured value and the SV desired value occur. It is used to suppress overshoot/undershoot. As a rule of thumb this value must be around 25% of the integral time setting in seconds.
  • rPT: control response parameter. The control response for a change in the setvalue (SV) can be set with this parameter:
    • 0: slow, when no overshoot is allowed (default setting for PID control & position proportioning PID control)
    • 1: medium
    • 2: fast, when setvalue must be reached as fast as possible, with some allowed overshoot (default setting for heat/cool PID control)
  • Pc: proportional band of the cooling side of the controller (when cooling is present) in °C.
  • Ic: integral time of the cooling side of the controller (when cooling is present) in sec.
  • dc: derivative time of the cooling side of the controller (when cooling is present) in sec. This is used for the control behaviour when sudden changes between the PV measured value and the SV desired value occur. It is used to suppress overshoot/undershoot. As a rule of thumb this value must be around 25% of the integral time setting in seconds.
  • db: this is the overlap/deadband of the proportional bands (when cooling is present) used in a heat/cool situation (when available). Default value is 0 (0.0): no deadband.
Finetuning of control behaviour
  • Ar: manual reset. This parameter is to adjust the remaining offset when a P-only or PD controller (so no I action) is used. Default setting is 0.0%
Extra time-dependent parameters for running simple ramp up/ramp down profile patterns
  • SVRU: setting change rate limiter (up). This ramp up parameter is for the automatic increase of the setvalue in °C per time unit (minutes/hours: see change rate limiter unit time P7-31 instruction manual). Default value is oFF (unused).
  • SVRd: setting change rate limiter (down). This ramp down parameter is for the automatic decrease of the setvalue in °C per time unit (minutes/hours: see change rate limiter unit time P7-31 instruction manual). Default value is oFF (unused).
  • AST: hold time after reaching desired temperature (with change rate limiter) before continuing to next (linked) area. The unit of the time depends on the setting of the soak time unit parameter (see engineering mode):
    • 0 mins 0 sec to 199 min 59 sec
    • 0 hours 0 mins to 99 hours 59 mins
  • LnYA: link area number. These are the memory area numbers (1-8) for linking the corresponding memory areas when ramp/soak control is performed. Default value is oFF (disabled, off: no linked next area)

After pushing SET again on LnYA, the display returns to the the 1st parameter in the list.

Extra tip for ramp/soak profiles: use parameter group F70 for the time units

Use parameter group F70 to set the correct time units for the profile. This is an engineering parameter and therefore the controller must first be put in stop mode.

 

  • SVrR: set the time unit for the ramp up/down parameter setting change rate limiter: default setting is 60 seconds
  • SRdP: select the time unit for the area soak time:
    • 0: 0 hours 00 minutes to 99 hours 59 minutes
    • 1: 0 minutes 00 seconds to 199 minutes 59 seconds (default setting)
Parameter group F70 for ramp soak profile time units
Returning to normal operating display

Returning to the normal operating display can be done in various ways:

  • Push SET and <MODE at the same time to return to normal operation
  • You can also wait until the controller automatically returns to the normal operation display.
  • Push SET for more than 2 seconds
Overview of all possible FB series parameters that can be set in running mode (depending on installed option(s))

Note: The remarks to the pages between the brackets (i.e. P 7-21) refer to more detailed information in the instruction manual.

Detailed parameters to set: some parameters are only shown with certain options. Consult instruction manual chapter 7 for further information on each parameter.
Instruction video: change PID control parameters

Use with caution: automatically detection of PID parameters

The following settings are for automatically tuning the control behaviour. Use these settings only when your process allows for a continuous 100% and 0% drive from the control output and large temperature overshoot/undershoot values can occur, which can cause unsafe situations in your process. A good detectable and reproduceable variation on the measurement signal (PV) is necessary to automatically determine of the PID values.

Caution for using autotuning (AT)
  • When the measured temperature (PV) change (up or down) is less than 1°C per minute during autotuning (AT), the automatic detection of PID parameters is not possible. In this case: adjust the PID values manually.
  • Manual setting of the PID values may also be necessary if the setvalue (SV) is around the ambient temperature or when the setvalue (SV) is close to the maximum temperature that can be achieved by the load.
  • If the output change rate limiter is set, the optimum PID values may not be computed by the autotuning (AT).
Before autotuning (AT) can start, the following requirements must be satisfied:

Operation mode state:

  • Run/Stop transfer: Run
  • PID/AT transfer: PID control
  • Auto/Manual transfer: Auto mode
  • Remote/Local transfer: Local mode

Parameter setting:

  • Output limiter high >= 0.1%
  • Output limiter low <= 99.9%

Input value state:

  • Measured value (PV) is not underscale (uuuu on display)
  • Measured value (PV) is not overscale (oooo on display)
  • Measured value (PV) <= input error determination point (high)
  • Measured value (PV) >= input error determination point (low)
Start the autotuning (AT)

The autotuning function can start from any state after power on, during a rise in temperature or in stable control.

Step 1: press and hold only the <MODE key for 2 seconds at the PV/SV monitor screen until operation mode display display. First you will see the PID/autotuning (AT) transfer screen

Step 2: switch the autotuning (AT) on by pushing the /\ (up) key. You will see that the AT indicator on the top of the screen starts to flash.

  • During the autotuning (AT) the control output will be set to 100.0% and 0% during which the change of the measured value (PV) will be observed.
  • This will be done a few times.
  • Only when the measured change of the PV value reproduces, the new PID values can be calculated, if not: the original PID values will not be changed.
Setting procedure for F52 autotuning (AT) parameters
  • Stop the controller by pushing the <MODE key for more than 2 seconds
  • ARU (auto tuning) appears, press the <MODE key
  • STU (startup tuning) appears, press the <MODE key
  • A-n (auto/manual) appears, press the <MODE key
  • L-E (local/remote) appears, press the <MODE key
  • r-S (run/stop) appears. When the controller is running (indicating rUn) you need to use the /\ key to switch the controller to stop mode. Now SToP will be indicated by the controller.
  • Push both the SET and <MODE keys together for more than 2 seconds to enter the engineering setting menu F10
  • Push the /\ key until you reach F52 (the parameter group for configuring the autotuning)
  • Press SET: ATb AT bias appears. When overshoot during autotuning (AT) is not allowed, you can set a bias on the setvalue (SV) so the autotuning is performed at a lower temperature. Default setting is 0°C
  • Push SET to store selection. Other parameters appear.
  • ATC: AT cycles. With this parameter the number of on (100%) off (0%) cycles can be set for the autotuning (AT) function:
    • 0: 1.5 cycles
    • 1: 2.0 cycles (default setting)
    • 2: 2.5 cycles
    • 3: 3.0 cycles
  • ATH: differential gap time. During this time, the control output is held at the same state (100% on, 0% off) so the autotuning algorithm has time to see the changes in the measured value (PV). If this time is too short, the measured value oscillates too much and a correct change in PV cannot be determined:
    • default value is 10.0 seconds
    • set this value (time in seconds) to 1/100 x time required for the temperature rise
  • ATon/AToF: limit the output value maximum and minumum during autotuning (AT):
    • default value for AT on (maximum): 105.0% (maximum not limited)
    • default value for AT off (minimum: -105.0% (not limited)
  • PLH/PLL: proportional band limiter heat-side high/low: with this value the proportional band can be limited to a maximum and minimum value while autotuning (AT) or startup tuning (ST) are performed. The value determined by the autotuning must fall inbetween these values, otherwise the limited value is used.
    • default value for high: input span (max. temperature) or 1000.0% (voltage/current input)
    • default value for low: 0°C (0.0, 0.00) or 0.0% (voltage/current input)
  • ILH/ILL: integral limiter heat-side high/low: the integral time is restricted to these values while autotuning (AT) or startup tuning (ST) is performed:
    • default value for high: 3600 sec
    • default value for low: 0
  • dLH/dLL: derivative time limiter heat-side high/low: the derivative time is restricted to these values while autotuning (AT) or startup tuning (ST) is performed:
    • default value for high: 3600 sec
    • default value for low: 0 sec
  • PcLH/PcLL: proportional band limiter cool-side high/low: with this value the proportional band can be limited to a maximum and minimum value while autotuning (AT) or startup tuning (ST) are performed. The value determined by the autotuning must fall inbetween these values, otherwise the limited value is used.
    • default value for high: input span (max. temperature) or 1000.0% (voltage/current input)
    • default value for low: 1°C (0.1, 0.01) or 0.1% (voltage/current input)
  • IcLH/IcLL: integral limiter cool-side high/low: the integral time is restricted to these values while autotuning (AT) or startup tuning (ST) is performed:
    • default value for high: 3600 sec
    • default value for low: 0
  • dcLH/dcLL: derivative time limiter cool-side high/low: the derivative time is restricted to these values while autotuning (AT) or startup tuning (ST) is performed:
    • default value for high: 3600 sec
    • default value for low: 0 sec
  • PAJ/PcAJ: proportional band adjustment factor (heat-side/cool-side): this factor multiplies the automatically detected proportional band in °C with the value in this parameter. Default value is 1.00, so the calculated value from the autotuning is used.
  • IAJ/IcAJ: integral time adjustment factor (heat-side/cool-side): this factor multiplies the automatically detected I time with the value in this parameter. Default value is 1.00, so the calculated value from the autotuning is used.
  • dAJ/dcAJ: differential time adjustment factor (heat-side/cool-side): this factor multiplies the automatically detected I time with the value in this parameter. Default value is 1.00, so the calculated value from the autotuning is used.

After pushing SET again on dcAJ, the display returns to the the F parameter list.

Parameter group 52: autotuning (AT)
Returning to normal operating display

Returning to the normal operating display can be done in various ways:

  • Push SET and <MODE at the same time to return to normal operation
  • You can also wait until the controller automatically returns to the normal operation display.
  • Push SET for more than 2 seconds

Settings for heater break, input signal, PID control cycle and communication

The following part contains extra settings for adjustment of the heater break alarm (HbA), measurement input signal bias and filter (both for PV measurement input and RS remote setting input) as well as the adjustment of the PID control cycle time. It also contains the settings for the 2 (optional) communication interfaces.

The settings can be changed with the controller in run mode.

However: when changing the communication parameters, a power cycle on the controller is necessary to accept the new settings.

Note: consult chapter 7.4.1 display sequence  in the instruction manual for further details on the function of each parameter.

Note: The remarks to the pages between the brackets (i.e. P 7-35) refer to more detailed information in the instruction manual.

Accessing the extra settings of the controller from the normal operating display

Note: the following list contains various parameters that are dependent on the options that you ordered with the controller. Because of this certain parameters described below will not show on your specific controller.

Press the SET key (and keep it pressed), now also push the <MODE key once and short. The first parameter HbA1 (or Pb when heater break is not present) will appear.

Note: each next parameter can be accessed by pushing the SET button.

Settings for heater break alarm (optional: must be specified at ordering)

Please note, that there are 2 heater break alarm types:

  • Type A: for time-proportional control output:
    • relay contact
    • voltage pulse
  • Type B: for analog (continous) control output:
    • DC voltage signal
    • DC current signal (i.e. 4-20mA)

Note: it is strongly advised to read the chapter 7.4.2. on the heater break alarm adjustment in the instruction manual. This way the alarm is set correctly and no false alarms occur.

  • HbA1/HbA2: is the setting in Amperes for the heater break alarm (when present).
    • Type A: time proportional control output:
      • Set this value to 85% of the maximum reading of the CT (current transformer) input.
      • Set this value to an even lower value to prevent a false alarm in case the power supply becomes unstable.
      • When more than 1 heaters are connected in parallel, the HBA set value can be increased to detect a single heater failure.
      • Default value is oFF (not used)
    • Type B: analog (continous) control output:
      • Set the value to the maximum CT input value. This will be the current when the control is at 100% control output, the maximum. This setting is used to calculate the correct adjustment to prevent false alarms.
  • HbL1/HbL2: heater break determination point 1/2. Set the heater break determination point for heater break alarm type B (analog continuous control output). Default setting is 30.0%
  • HbH1/HbH2: heater melting determination point 1/2. Set the heater melting determination point for heater alarm type B (analog continuous control output). Default setting is 30.0%
Finetinung the (temperature) measurement signal (PV)

The following parameters are settings for the finetuning of the (temperature) input measurement and the filtering of noise on the temperature measurement or on the feedback potmeter of a servo-controlled valve:

  • Pb: PV bias in °C. This is a finetuning value (+/- temperature in °C) to compensate for the individual variations between the temperature sensors. Note: please use this value with caution. This value is not for correcting a faulty sensor or wrong sensor cabling: that must always be replaced. The default value is +/- 0.0°C (no adjustment)
  • dF: PV digital filter in seconds. This value is used to eliminate noise on a measurement input. The default value is oFF (disabled). Caution: a too high value can result in an unstable process control with too high temperature over/undershoot.
  • Pr: PV ratio. This is a multiplication factor (span calibration) that is applied to the measured value (PV). This is for compensating individual variations between the sensors or to correct the difference between the measured value (PV) of other instruments. Default value is 1.000.
  • PLC: PV low input cut-off. This setting is used in combination with the square root extraction function. The PV value below this setting is ignored to prevent disturbance of the control caused by input variation in the low measurement range. Default setting is 0.00
Finetinung the remote setting (RS) input signal

The following parameters are settings for the finetuning of the remote input measurement and the filtering of noise on this input signal:

  • rb: RS bias. This value adds a bias to the remote setting (RS) input value. Default value is 0
  • dF2: RSdigital filter in seconds. This value is used to eliminate noise on a remote setting (RS) input. The default value is oFF (disabled)
  • rr: RS ratio. This is a multiplication factor (span calibration) that is applied to the remote setting input value (RS).  Default value is 1.000.
Settings for time proportioning output of a PID controller

The following parameters are for adjustment of the behaviour of the control output timing for a time proportioning control output (heat/cool controller: heat-side) such as a relay contact or voltage pulse. For an analog output (i.e. 4-20mA) these settings are not used:

  • r: proportional cycle time (heat-side) in seconds. This is the control cycle time in seconds for time based control outputs, such as voltage pulse for SSR driving (then set it to its minimum value) and relay contacts (set it to 10-20s to prevent damage to the relay switching too often). Please note that an analog output control signal (i.e. 4-20mA) has no setting for a proportional cycle time.
  • t: proportional cycle time (when cooling is present: cool-side) in seconds. This is the control cycle time in seconds for time based control outputs, such as voltage pulse for SSR driving (then set it to its minimum value) and relay contacts (set it to 10-20s to prevent damage to the relay switching too often). Please note that an analog output control signal (i.e. 4-20mA) has no setting for a proportional cycle time.
Adjusting the (optional) communication settings

!!! IMPORTANT NOTICE: CHANGED COMMUNICATION PARAMETERS ARE ONLY USED AFTER PERFORMING A POWER CYCLE ON THE CONTROLLER !!!

For more information regarding the communication and the parameter addresses: consult the communication manual (see link on top of page).

The communication interface is an option that must be selected at ordering the FB controller.

For adjusting the communication protocol (ASCII RKC or ModBUS) see parameter group F60.

  • Add1/Add2: device address 1/2. Sets the communication addresses for the 2 communication interfaces:
    • device address 1: slave address of the controller for normal communication with host (communication 1 function)
    • device address 2: slave address of the controller for the intercontroller communication

Important remarks:

    • do not use the same device address for more than one controller in multi-drop connection. Each controller must have an unique address in a multi-drop connection
    • when using the intercontroller communication function, set device address 2 to any number in the range of 0 to 31. In addition, always set the address of each controller to the number in succession starting from 0.
    • in ModBUS communication, two-way communication is not possible when the address is 0
  • bPS1/bPS2: communication speed 1/2. Set the communication speed for interface 1 and 2:
    • 2.4: 2400 bps
    • 4.8: 4800 bps
    • 9.6: 9600 bps
    • 19.2: 19200 bps (default setting)
    • 38.4: 38400 bps
  • bIT1/biT2: data bit configuration for interface 1 and 2. 7 bit communication in only possible with RKC ASCII protocol communication. Default setting is 8n1 (8 databits, no parity, 1 stopbit)
  • InT1/InT2: communication interval time for interface 1 and 2: default setting 10 ms.
Use parameter group F60 for communication protocol selection

!!! IMPORTANT NOTICE: CHANGED COMMUNICATION PARAMETERS ARE ONLY USED AFTER PERFORMING A POWER CYCLE ON THE CONTROLLER !!!

Use parameter group F60 to select the communication protocol. This is an engineering parameter and therefore the controller must first be put in stop mode. For setting the communication parameters (address, databits, parity and stopbits), see the extra settings.

  • CAP1: select communication protocol for interface 1 (does not support intercontroller communication):
    • 0: RKC communication
    • 1: ModBUS
  • CAP2: select communication protocol for interface 2 (supports intercontroller communication):
    • 0: RKC communication
    • 1: ModBUS
    • 2: Intercontroller communication: for creation of a system with a master and up to 4 slave(s). Run/Stop/setvalues/alarms are automatically communicated between the controllers over the intercontroller communication
Parameter group F60: communication protocol
Setting the lock level for parameters

It is possible to restrict parameter setting changes by key operation.

  • LCY: set lock level: factory set value 0000: all parameters unlocked
    • ###0: all parameters except set value (SV) and event (EV1-EV4) unlocked
    • ###1: all parameters except set value (SV) and event (EV1-EV4) locked
    • ##0#: event set value EV1 to EV1 unlocked
    • ##1#: event set value EV1 to EV1 locked
    • #0##: set value (SV) unlocked
    • #1##: set value (SV) locked
    • 0###: 0, this is fixed, no setting possible

Remarks:

  • In the set lock level, data lock is not possible for the following parameters:
    • memory area selection (SV setting & monitor mode)
    • parameter of function block number F10 to F91 (engineering mode)
  • Set lock level can be changed in both run and stop mode
  • Parameters protected by data lock function are still displayed for monitoring
Overview of all possible FB series parameters that can be set in running mode (depending on installed option(s))

Note: The remarks to the pages between the brackets (i.e. P 7-35) refer to more detailed information in the instruction manual.

Detailed parameters to set: some parameters are only shown with certain options. Consult instruction manual chapter 7 for further information on each parameter.
Returning to normal operating display

Returning to the normal operating display can be done in various ways:

  • Push SET and <MODE at the same time to return to normal operation
  • You can also wait 1 minute until the controller automatically returns to the normal operation display.

Retransmission output: (optional) extra analog output for MV, PV or SV

The FB controller can be fitted with an optional extra analog output signal that can be used to drive the internal control output (MV, manipulated value) for modulating a burner control, measured temperature (PV, process value) or the desired temperature (SV, setvalue) to other devices i.e.:

  • temperature recorders (measured value)
  • 1 or multiple slaves (setvalue)
  • indicators on the panel 

The type of analog output can be selected at ordering this optional feature of the FB controller. This can be either:

  • current output: 0/4-20mAdc
  • voltage output: 0/1-5Vdc, 0-10Vdc

Parameter group F33 is used for setting the retransmission output analog signal of the temperature controller. Please note, that this retransmission output is optional and must be selected at ordering the controller.

Setting procedure for F33 transmission output type
  • Stop the controller by pushing the <MODE key for more than 2 seconds
  • ARU (auto tuning) appears, press the <MODE key
  • STU (startup tuning) appears, press the <MODE key
  • A-n (auto/manual) appears, press the <MODE key
  • L-E (local/remote) appears, press the <MODE key
  • r-S (run/stop) appears. When the controller is running (indicating rUn) you need to use the /\ key to switch the controller to stop mode. Now SToP will be indicated by the controller.
  • Push both the SET and <MODE keys together for more than 2 seconds to enter the engineering setting menu F10
  • Push the /\ key until you reach F33 (the parameter group for configuring the retransmission output AO)
  • Press SET: Ao appears. With this setting the internal FB parameter can be selected that must be sent to the AO retransmission output.
    • 0: none
    • 1: measured value (PV), this is the default setting
    • 2: setvalue (SV) monitor. This value is the actual setvalue the PID controller is working with, also during a ramp up/down with change rate limiter for a profile.
    • 3: deviation value
    • 4: manipulated output value (MV1) heat side. This is the PID controller output for heating. Use this setting for a modulation signal for a burner control. 
    • 5: manipulated output value (MV2) cool-side. This is the PID controller output for cooling.
    • 6: setvalue (SV). This is the end-setvalue that must be reached (also in a profile). So when a ramp up/down is used using a change rate limiter value the end-setvalue is used. Use setting 2 when you want the -actual ramping setvalue to be  transmitted.
    • 7: remote setting (RS) input value. 
  • Push SET to store selection. Other parameters appear.
  • AHS/ALS: transmission output scale high/low. With these settings the output values can be limited to a maximum and minimum.
    • output scale high: default value is input scale high (maximum temperature)
    • output scale low: default value is input scale low (minimum temperature)

After pushing SET again in ALS the display returns to the start of the F parameter list.

Returning to normal operating display

Returning to the normal operating display can be done in various ways:

  • Push SET and <MODE at the same time to return to normal operation
  • You can also wait 1 minute until the controller automatically returns to the normal operation display.
Burner control heat demand HD signal

Please note, that for a  burner control you need, besides this analog modulation signal, also digital heat demand HD signal of the controller. For this the optional DO1 digital output is used.

See the parameter group F41 for setting this DO1 digital output signal.

Please note, that this digital output DO1 signal is optional and must be selected at ordering the RB controller.

Retransmission analog output settings F33

Motorvalve control / 2-point control

Important remarks
  • this function block for 2-position control of a motorvalve can only be used, when position proportioning PID control is selected. See: parameter group F51 control action configuration and then the 1st parameter in this group:
    • oS control action: used settings for motorvalve control:
      • 5: position proportioning PID control (reverse/heating action)
      • 6: position proportioning PID control (direct/cooling action)
  • feedback resistance potmeter (FBR) is an option that must be ordered when selecting the FB controller. If this option is not ordered with the controller, the parameters for this feedback potmeter become invalid.
Position proportioning PID control

For more information: see 6.12 position proportioning control in the instruction manual.

  • Position proportioning PID control converts the control output value of the PID controller into signals for a motorvalve and performs temperature control by regulating flow with the motorvalve.
  • PID control with or without a feedback potmeter/resistance (FBR) from the motorvalve (position indicator) is possible.
  • The control action can be selected between indirect action (heating) or direct action (cooling).

For manual operation in positioning proportioning control, see 6.7 auto/manual transfer

When a feedback potmeter/resistance (FBR) is used
  • Min/max limit of valve position (limit value of FBR potmeter input) can be set: parameters output limiter high, output limiter low
  • Valve position can be manually set: parameter manipulated output value (MV) setting in manual mode
  • Feedback adjustment is necessary: parameter feedback adjustment
  • Action at feedback resistance (FBR) input error can be selected: parameter action at FBR input error
  • Output value (FBR input) with the output turned on or off when the Autotuning (AT) function is executed can be restrictedparameters output value with AT turned on, output value with AT turned off
  • The close-side (or open-side) output remains ON when the valve position is fully closed (or opened): parameter action at saturated output
When there is no feedback resistance (FBR) input
  • Control motor operation can be restricted by the integrated output limiter: parameter integrated output limiter
  • The /\ UP or \/ DOWN key is used to manually control the output for opening or closing the motor.
  • /\ UP key (open-side):
    • When UP key is pushed:  open-side output (OUT1) is continuously on.
    • UP key released: open-side output (OUT1) is off. The position of the valve remains in this position.
  • \/ DOWN key (close-side):
    • When DOWN key is pushed, close-side output (OUT2) is continuously on.
    • DOWN key released: close-side output (OUT2) is off. The position of the valve remains in this position.
Which parameter is present with/without feedback resistance (FBR) potmeter input
Remarks
  • At ordering: specify that you need the 2 outputs option (OUT1/OUT2) for position control.
  • Startup tuning (ST) cannot be executed by positioning proportioning PID control. In addition, the output change rate limiter also becomes invalid.
Position control setting flowchart

This section describes the position proportioning PID control dedicated setting items and the setting items which are effective when there is or is not a Feedback resistance (FBR) input. The following setting items are all set in the Engineering mode. For this: the controller must be in the STOP state

Setting procedure for system WITH feedback resistor (FBR) for position

Step 1: we will set the following parameters in parameter group F51:

  • control action of the PID controller for a indirect (heating) position control or a direct (cooling) position control
  • control output with controller in stop
  • maximum/minimum output signals for the valve control
  • Stop the controller by pushing the <MODE key for more than 2 seconds
  • ARU (auto tuning) appears, press the <MODE key
  • STU (startup tuning) appears, press the <MODE key
  • A-n (auto/manual) appears, press the <MODE key
  • L-E (local/remote) appears, press the <MODE key
  • r-S (run/stop) appears. When the controller is running (indicating rUn) you need to use the /\ key to switch the controller to stop mode. Now SToP will be indicated by the controller.
  • Push both the SET and <MODE keys together for more than 2 seconds to enter the engineering setting menu F10
  • Push the /\ key until you reach F51 (the parameter group for control action)
  • Press SET: oS control action appears, this is the parameter that sets the control action to direct for a cooling process, or indirect for a heating process. Furthermore, there are more settings possible for the type of control used (option must be ordered and present at the FB controller), parameters 5 and 6 are for position proportioning control, select the parameter with the action for your process:
    • 5: position proportioning PID control (reverse/heating action) for 2-point motor control. 
    • 6: position proportioning PID control (direct/cooling action) for 2-point motor control. 
  • Push SET to store selection. Other parameters appear
  • Continue pushing SET until parameter rAV1 appears.
  • rAV1: manipulated output value (MV1) when controller is in stop mode. Default value is -5.0%. Here you can set the valve position when the PID controller is in stop mode.
  • Continue pushing set until oLH appears.
  • oLH/oLL: output limiter high/low for MV1. This value limits control output 1 (MV1) to a maximum value, this is the maximum position of the valve (default setting 105.0%) or minimum value, this is the minimum position of the valve (default setting -5.0%)

Keep on pushing SET again until the display returns to the start of the F parameter list. Now select parameter group F52.

Step 2: we will set the following parameters in parameter group F52:

  • control output value with autotuning (AT) on
  • control output value with autotuning (AT) off
  • Push the /\ key until you reach F52 (the parameter group for autotuning)
  • Press SET: ATb AT bias appears.
  • Continue pushing SET until parameter ATon appears.
  • ATon/AToF: limit the output value maximum and minumum during autotuning (AT): here you can set the controller output when autotuning (AT) is on (ATon parameter) and off (AToff parameter)
    • default value for AT on (maximum): 105.0% (maximum not limited)
    • default value for AT off (minimum: -105.0% (not limited)

Keep on pushing SET again until the display returns to the start of the F parameter list. Now select parameter group F53.

Step 3: we will set the following parameters in parameter group F53: this parameter group is for the actual position proportioning control. Also execute the adjustment for the feedback resistance (FBR) input:

  • open/close output neutral zone
  • open/close output differential gap
  • action at feedback resistance (FBR) input error
  • control motor time
  • valve action at stop
  • action at saturated output

Important remark: the settings must be executed in this order.

  • Push the /\ key until you reach F53 (the parameter group for position proportioning control)
  • Press SET: Ydb appears. This parameter is for the open/close neutral zone. Set the output OFF zone between the open-side and close-side outputs. This value can be adjusted from 0.1 to 10.0% of the output. Default setting is 2.0%
  • Press SET, YHS appears. This is the parameter for the open/close differential gap of the open-side and close-side outputs. This value can be adjusted from 0.1 to 5.0% of the output. Default setting is 1.0%
  • Press SET: Ybr appears. This parameter sets the action to be taken when there is an input error with the feedback (FBR) resistor:
    • 0: depending on the valve action at stop. This is the default setting. So when an input error occurs, the control output goes to the setting for the output in stop state. This is the rAV1: manipulated output value (MV1) when controller is in stop mode, set in F51 above.
    • 1: control action continued: the control just goes on as before the input error
  • Push SET: PoS feedback adjustment appears. We will perform this action after the following parameters have been set.
  • Push SET: AoR control motor time appears. This parameter is for setting the time in seconds, for the control motor to rotate from the fully closed to the fully opened position. Setting range is 5 to 1000 seconds, default value is 10 seconds. Remark: when the feedback adjustment is performed, the control motor driving time is automatically computed. However, if the time thus computed is less than 5 seconds, no new value is updated and the old value remains.
  • Push SET, VAL appears. With this value, the action of the open-side and the close-side outputs with control at STOP can be set:
    • 0: close-side output OFF, open-side output OFF. This is the default value
    • 1: close-side output ON, open-side output OFF
    • 2: close-side output OFF, open-side output ON
  • Push SET YASo appears. With this parameter the action of the close-side or open-side outputs when the valve is fully opened, or closed, can be set:
    • 0: invalid: the close-side (or open-side) output turns OFF when the valve position is fully closed (or opened). This is the default setting.
    • 1: valid: the close-side (or open-side) output remains ON when the valve position is fully closed (or opened)
PoS feedback adjustment in F53
  • Keep on pushing SET until PoS: feedback adjustment appears. This adjustment is for mapping the measurement of the feedback potmeter measurement range exactly on the 0-100.0% control output of the PID controller. This is to prevent deadbands in the control. 

At the adjustment screen, press and hold the <MODE key for 5 seconds to start the adjustment. The display automatically returns to this screen after the adjustment is completed.

Note: the display returns automatically to the PV/SV monitor screen (normal operating display) when no key is pushed within 1 minute (except during feedback adjustment)

Returning to normal operating display

Returning to the normal operating display can be done in various ways:

  • Push SET and <MODE at the same time to return to normal operation
  • You can also wait 1 minute until the controller automatically returns to the normal operation display.

Setting procedure for system WITHOUT feedback resistor (FBR) for position

Step 1: we will set the following parameters in parameter group F51:

  • control action of the PID controller for a indirect (heating) position control or a direct (cooling) position control
  • control output with controller in stop
  • maximum/minimum output signals for the valve control
  • Stop the controller by pushing the <MODE key for more than 2 seconds
  • ARU (auto tuning) appears, press the <MODE key
  • STU (startup tuning) appears, press the <MODE key
  • A-n (auto/manual) appears, press the <MODE key
  • L-E (local/remote) appears, press the <MODE key
  • r-S (run/stop) appears. When the controller is running (indicating rUn) you need to use the /\ key to switch the controller to stop mode. Now SToP will be indicated by the controller.
  • Push both the SET and <MODE keys together for more than 2 seconds to enter the engineering setting menu F10
  • Push the /\ key until you reach F51 (the parameter group for control action)
  • Press SET: oS control action appears, this is the parameter that sets the control action to direct for a cooling process, or indirect for a heating process. Furthermore, there are more settings possible for the type of control used (option must be ordered and present at the FB controller), parameters 5 and 6 are for position proportioning control, select the parameter with the action for your process:
    • 5: position proportioning PID control (reverse/heating action) for 2-point motor control. 
    • 6: position proportioning PID control (direct/cooling action) for 2-point motor control. 
  • Push SET to store selection. Other parameters appear
  • Continue pushing SET until parameter rAV1 appears.
  • rAV1: manipulated output value (MV1) when controller is in stop mode. Default value is -5.0%. Here you can set the valve position when the PID controller is in stop mode.
  • Continue pushing set until oLH appears.
  • oLH/oLL: output limiter high/low for MV1. This value limits control output 1 (MV1) to a maximum. Not used for motorvalve control without feedback (FBR) potmeter.

Keep on pushing SET again until the display returns to the start of the F parameter list. Now select parameter group F53.

Step 2: we will set the following parameters in parameter group F53: this parameter group is for the actual position proportioning control:

  • open/close output neutral zone
  • open/close output differential gap
  • control motor time
  • integrated output limiter
  • valve action at stop

Important remark: the settings must be executed in this order.

  • Push the /\ key until you reach F53 (the parameter group for position proportioning control)
  • Press SET: Ydb appears. This parameter is for the open/close neutral zone. Set the output OFF zone between the open-side and close-side outputs. This value can be adjusted from 0.1 to 10.0% of the output. Default setting is 2.0%
  • Press SET, YHS appears. This is the parameter for the open/close differential gap of the open-side and close-side outputs. This value can be adjusted from 0.1 to 5.0% of the output. Default setting is 1.0%
  • Press SET, AoR: control motor time appears. This parameter is for setting the time in seconds, for the control motor to rotate from the fully closed to the fully opened position. Setting range is 5 to 1000 seconds, default value is 10 seconds.
  • Push SET, oLA integrated output limiter appears. This value is used for disabling the output after a longer time than it normally takes to open (or close) the valve. This value can be adjusted from 0.0 to 200.0% of the adjusted AoR parameter control motor time (in seconds). Default setting is 150.0% of the control motor time.  

Note: it is strongly advised to use a oLA setting of 0 in most cases.

Since the output is integrated when the open-side (or close-side) output is outputted continuously, once the inverted output is outputted, the integrated value is reset.

Example: if the control is started at the fully closed state of the valve, when the control motor time (time to open the valve from 0% to fully open) is set at 10 seconds and the integrated output limiter value is set at 100%, the following results.

  • Push SET, VAL appears. With this value, the action of the open-side and the close-side outputs with control at STOP can be set:
    • 0: close-side output OFF, open-side output OFF. This is the default value
    • 1: close-side output ON, open-side output OFF
    • 2: close-side output OFF, open-side output ON

After pushing SET again in VAL the display returns to the start of the F parameter list.

Returning to normal operating display

Returning to the normal operating display can be done in various ways:

  • Push SET and <MODE at the same time to return to normal operation
  • You can also wait 1 minute until the controller automatically returns to the normal operation display.
Settings for 2-point motorvalve control positioning proportioning PID F53

COM-KG configuration/communication interface

With the COM_KG you can configure the RB controller easily via a USB port to your laptop / desktop.

Can also be used as a generic USB to RS-485/422 interface

Don’t forget to specify the correct RKC equipment interface cable when ordering, see more information for details.

Leaflet COM_KG
Instruction manual COM_KG