RB series setting input type event control PID and communication

The settings of the RB series 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.

– Leaflet RB series
– Instruction manual RB series
Communication manual RB series

available in all sizes

Explanation of the keys on the front of the RB controller

RKC Instrument RB series front panel

As an example the RB100 is shown, the other larger versions of the RB 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:

  • <R/S key: the blinking digit indicates which digit can be set. The blinking digit can be moved to another position by pressing the <R/S key. Note: this key is also used for switching the controller from run to stop or vice versa.
  • \/ 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.

The 1st step: switch the controller into parameter setting mode

In order to be able to change so called engineering settings of the controller, the mode of the controller must be switched from 0 (locked: no parameter change) to 0128 (parameter change allowed). Furthermore, the controller must be switched in STOP mode (non-controlling), otherwise changes in the settings are not possible.

  • Power on the controller and wait until the measured temperature appears (tip: the controller first shows the type of measurement input and its range)
  • Go to engineering mode by pressing and holding both the SET and <R/S keys for 4 seconds or more
  • Now F00 appears: switch to the ModE screen by pressing 3x SET key.
  • By using the keys, change the value from 0 (parameter change not allowed) into 0128 (parameter change allowed).
  • Push the SET key: R/S (run/stop) appears: change the value into 1 (stop) to stop the controller.
  • Push the SET key: the display with now shows F00 again. You are now in setting mode.
Enable setting mode on RKC Instrument RB series controller
enabling settings on a RB controller
Enable parameter setting mode on your RKC Instrument RB series controller
Important note: lock the setting mode after making modifications

After changing the settings in the controller, set the ModE back to the value 0000 so parameter change mode cannot be accidentally accessed.

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

After switching the controller to stop mode and enabling the editing of parameters (ModE:0128) the measurement input type (controller parameter group F21) can be set. This procedure is also described in chapter 5.1 Initial Setting of the instruction manual.

Setting procedure for F21 measurement input type
  • Stop the controller by pushing the <R/S key for more than 4 seconds (only necessary when the small green lamp above STOP is not lit)
  • Push both the SET and <R/S keys together for more than 4 seconds to enter the engineering setting menu F00
  • Push the /\ key until you reach F21 (the parameter for setting the input type)
  • Press SET: INP appears. For thermocouple type K -199.9 to +400.0°C, select 0000 (for other types, see table below)
  • Push SET to store selection. Other parameters appear.
  • PGdP: the number of decimals behind the comma (0=none)
  • BoS: Sensor burnout selectionSelection 0000: 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). Selection 0001: measured value goes to downscale: measurement moves to minimum value in case of open connection.
  • PGSH: input scale high (maximum value of measurement range)
  • PGSL: input scale low (minimum value of measurement range)
  • SLH: setting limiter high (maximum allowed desired temperature that can be set)
  • SLL: setting limiter low (minimum allowed desired temperature that can be set)
  • dSoP: select whether the PV (process value=measured value) must flash (0000) or not flash (0001) in case of input error.

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

Returning to normal operating display
  • Push SET and <R/S at the same time to return to normal operation.
  • Don’t forget to switch the temperature controller in run mode by pressing the <R/S (run/stop) key for a few seconds.
  • Don’t forget to set ModE back to 0000. This prevents accidental modifications of the controller parameters.
measurement input type F21
Possible input type selections with their ranges
types of thermocouple and RTD/Pt100 input in °C or °F
voltage and current type inputs
  • do not set to any number that is not in this table. 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
  • connect a 250 ohm shunt resistor to the measuring input terminals 11 and 12 for current input (0/4-20mAdc)
Important note before following the instruction video on how to change the measurement input type

Before following this instructional video, enable the parameter setting mode in your RB controller, see: first

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.

After switching the controller to stop mode and enabling the editing of parameters (ModE:0128) the event 1 parameter (controller parameter group F41) can be set. This procedure is also described in chapter 5.1 Initial Setting of the instruction manual.

Setting procedure for F41 event 1 configuration
  • Stop the controller by pushing the <R/S key for more than 4 seconds (only necessary when the small green lamp above STOP is not lit)
  • Push both the SET and <R/S keys together for more than 4 seconds to enter the engineering setting menu F00
  • Push the /\ key until you reach F41 (the parameter for setting the event 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)
  • 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.
  • Ebo1: with this you can also switch event 1/relay DO1 when an open thermocouple occurs, in this case set it to 0004 (switch DO1 heat demand off in case of measurement underscale or over scale with a broken thermocouple). For a normal heat demand signal HD use a value of 0000.
  • EXC1: selection of operation of the DO1 relay contact. 0000: contact of DO1 relay closed when event 1 occurs. 0001: contact of DO1 relay closed when event does not occur. Set to 0000 for a normal heat demand HD signal.
  • 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.
  • 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 0000 (not latching). For a maximum temperature alarm: set to 0001 (event latching) to prevent switching off when a maximum temperature had been reached.

After pushing SET again in E1L1 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 pages 8-101 and following).

Returning to normal operating display
  • Push SET and <R/S at the same time to return to normal operation.
  • Don’t forget to switch the temperature controller in run mode by pressing the <R/S (run/stop) key for a few seconds.
  • Don’t forget to set ModE back to 0000. This prevents accidental modifications of the controller parameters.
Set event 1 on RKC Instrument RB series
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 9: 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 <R/S at the same time to return to normal operation.
  • Don’t forget to switch the temperature controller in run mode by pressing the <R/S (run/stop) key for a few seconds.
  • Don’t forget to set ModE back to 0000. This prevents accidental modifications of the controller parameters.
  • 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 RB temperature controller in run status.

RB event 1 setvalue
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 0.5A. It is strongly advised to use extra interface relays driven by the relays inside the RB controller. This increases the limetime of the RB relays and the controller as a whole significantly. 

RB series DO1 event 1 status indicator
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 OUT2 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 OUT2.

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

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

Before following this instructional video, enable the parameter setting mode in your RB controller, see: first

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

After switching the controller to stop mode and enabling the editing of parameters (ModE:0128) the control action (controller parameter group F51) can be set. This procedure is also described in chapter 5.1 Initial Setting of the instruction manual.

Setting procedure for F51 control action configuration
  • Stop the controller by pushing the <R/S key for more than 4 seconds (only necessary when the small green lamp above STOP is not lit)
  • Push both the SET and <R/S keys together for more than 4 seconds to enter the engineering setting menu F00
  • Push the /\ key until you reach F51 (the parameter for setting the control action)
  • Press SET: oS control action appears, this is the parameter that sets the control action to direct (0000) for a cooling process, or indirect (0001) for a heating process.
  • Push SET to store selection. Other parameters appear.
  • oHH: on/off action differential gap upper side in °C.
  • oHL: on/off action differential gap lower side in °C.
  • obo: this is the value of the control output when a burnout (open thermocouple) occurs. 0000: the control output is normally calculated using the PV (measured) and SV (desired) temperature. 0001: the control output is set to a limiter value (output is switched off)
  • bUMP: this is the control output state when switching from normal automatic PID control to manual control of the output. 0000: no bumpless transfer, new output value immediately set to the output. 0001: bumpless transfer: the latest value of the control output is taken as a starting point when switching to manual output control.
  • 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.
  • RU: time setting of proportional cycle time. Leave it on the default value.

After pushing SET again on RU, 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 on page 8-124.

Returning to normal operating display
  • Push SET and <R/S at the same time to return to normal operation.
  • Don’t forget to switch the temperature controller in run mode by pressing the <R/S (run/stop) key for a few seconds.
  • Don’t forget to set ModE back to 0000. This prevents accidental modifications of the controller parameters.
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 8 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 setting) will appear. Push SET until ARU appears. Depending on the options, a number of 0 up to 4 events can installed in the RB controller.

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

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.

  • ARU: this is the setting for switching on the autotuning (AT).  0: normal PID control 1: switch the AT autotuning procedure on (only do this if your process allows a few cycles of 100%/0% control). After a few cycles with a temperature measurement that deviates enough, the automatically determined settings are taken for the PID. When there is not enough change in measured value the original values remain. Normally the value must be 0: normal PID control.
  • STU: startup tuning. With this setting the startup of the process can be optimized. 0: unused, 1: execute startup tuning once, 2: execute startup tuning always. Normally this value must be 0 for normal PID control.
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.
Finetuning of control behaviour

The following parameters are for further finetuning of the control behaviour, after the correct “normal” PID were determined:

  • ARW: anti-reset windup. This value in % of the proportional band limits the integral effect and prevents an overshoot. Default value is 100%.
  • Pc: proportional band of the cooling side of the controller (when cooling is present) in % of the proportional band heat side. Default value is 100%.
  • 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.
  • PRU: fine tuning setting. This parameter allows the operator to change the control response speed without changing the PID settings. Settable from -3 (slow response) to +3 (fast response). Default value is 0 (no finetuning).
Settings for heater break / control loop break (sensor) alarm (optional: must be specified at ordering)

The following parameters are for the heater break and control loop break alarm detection. The HBA alarm can be used with a time-proportional control output only (relay output, voltage pulse output). This option, including the CT (current transformer for the heating element) must be specified when ordering a new controller:

  • HbA: is the setting in Amperes for the heater break alarm (when present).
    • 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 0.0A.
  • 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)
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.
  • Mr: minimum on/off time for proportioning cycle (heat-side) in msec. In order to prevent damage to an electromechanical relay be switching too shortly on, a minimum time can be set for the control output to remain on. Default value is 0 msec.
Minimum/maximum limitation of the control output
  • oLH: output limiter high (for heat/cool: heat-side output limiter high) in %. This value limits the control output to a maximum value. Default value is 105.0%
  • oLL: output limiter low (for heat/cool: cool-side output limiter high) in %. This value limits the control output to a minimum value. Default value is -5.0% (for heat/cool: 105.0%)
Extra settings for time proportioning output of a heat/cool PID controller

The following parameters are extra settings for the time proportioning output of a heat/cool PID controller (when present) and are similar to the r:proportional cycle time and Mr: minimum on/off time, but then the cool-side of the PID controller:

  • 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.
  • Mt: minimum on/off time for proportioning cycle (when cooling is present: cool-side) in msec. In order to prevent damage to an electromechanical relay be switching too shortly on, a minimum time can be set for the control output to remain on. Default value is 0 msec.
Finetinung the (temperature) measurement signal

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 1 (or 1.0) seconds. Caution: a too high value can result in an unstable process control with too high temperature over/undershoot.
Use with caution: manual control output value

Sometimes (for testing purposes) the control output must be manually controlled to be able to test functions or adjust the process feedback. Use this value with caution since the control output is driven without safety feedback from the input measurement, Large overshoot in temperature can occur which can result in an unsafe situation in your process.

  • M-MV: manual manipulated output value MV in %. This value in % of the control output is used as a starting point, when switching the PID controller from normal automatic PID control to manual control. Default value is 0 (0.0) %: no control output signal.
Returning to normal operating display

The controller goes back to the normal operating display:

  • automatically when you don’t push the buttons for a certain time
  • manually when you push both the SET and <R/S keys together.
  • manually when you keep the SET key pressed for more than 2 seconds.
Overview of all possible RB 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 8-13) 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 8 for further information on each parameter.
Instruction video: change PID control parameters
Extra time-dependent parameters for running simple ramp up/ramp down profile patterns

Note: the following extra parameters show (when enabled in the RB settings). These parameters can be used for running a simple 4 setvalue profile with ramp up/down functionality:

  • rMFS timer function: used for running a simple profiler in the RB controller. Default value is 0 (unused):
    • default 0: unused (no timer function)
    • 1: timer function 1 (use the setvalue SV set at SV selection to start condition when time has expired)
    • 2: timer function 2 (use the setvalue SV set at SV selection to stop control when time has expired)
    • 3: timer function 3 (link setvalues from SV1 to SV4 to operate ramp/soak control and continue to control the SV4 after the timer has expired)
    • 4: timer function 4 (link setvalues from SV1 to SV4 to operate ramp/soak control and stop controlling the SV4 after the timer time.
  • RPTS repeat execution times: set the number of times, the profile of timer function 3 or 4 must be executed (9999:infinite). Default value is 0 (no repeat)
  • 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 P8-136 instruction manual). Default value is 0 (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 P8-136 instruction manual). Default value is 0 (unused).

Note: in function block F70 the following additional parameters can be set:

  • SVRr: time unit for setting the change rate limiter (ramp up/down):
    • 0: minutes (default value)
    • 1: hours
  • rMU: time unit for timer:
    • 0: Min.:sec. (default value)
    • 1: Hour:min.

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

The RB 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 RB 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.

After switching the controller to stop mode and enabling the editing of parameters (ModE:0128) the transmission output type (controller parameter group F33) can be set. This procedure is also described in chapter 5.1 Initial Setting of the instruction manual.

Setting procedure for F33 transmission output type
  • Stop the controller by pushing the <R/S key for more than 4 seconds (only necessary when the small green lamp above STOP is not lit)
  • Push both the SET and <R/S keys together for more than 4 seconds to enter the engineering setting menu F00
  • Push the /\ key until you reach F33 (the parameter for setting the input type)
  • Press SET: Ao appears. Here the internal RB controller parameter that must be sent to the extra analog output can be selected:
    • 0: manipulated output value (MV1). This is the control output of the PID controller. Use this setting for the modulation of the burner control in FryManager applications.
    • 1: measured value (PV). This is the measured temperature. This is the default value.
    • 2: setvalue (SV). This is the desired temperature.
  • Push SET to store selection. Other parameters appear.
  • AHS: transmission output scale high. This sets the maximum analog output value (default values: high-limit value of input span):
    • control output MV value: transmission output scale low to +105.0%. 
    • measured PV or setvalue SV: transmission output scale low to input scale high. 
  • ALS: transmission output scale low. This sets the minimum analog output value (default values: low-limit value of input span):
    • control output MV value: -5.0% to transmission output scale high
    • measured PV or setvalue SV: input scale low to transmission output scale high
  • AoFS: full scale adjustment value. Use this value with caution. This value is used to correct the error between instruments, the full scale value can be adjusted. Consult the details in the instruction manual before using this value.
  • AoZR: zero point adjustment value. Use this value with caution. This value is used to correct the error between instruments, the zero point value can be adjusted. Consult the details in the instruction manual before using this value.

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

For more details we advise you to consult the instruction manual detailed description of function block 33 on page 8-98.

Returning to normal operating display
  • Push SET and <R/S at the same time to return to normal operation.
  • Don’t forget to switch the temperature controller in run mode by pressing the <R/S (run/stop) key for a few seconds.
  • Don’t forget to set ModE back to 0000. This prevents accidental modifications of the controller parameters.
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.

RKC Instrument RB controller retransmission output type
Retransmission analog output settings F33

Adjusting the (optional) communication settings

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

After switching the controller to stop mode and enabling the editing of parameters (ModE:0128) the communication parameters (controller parameter group F60) can be set. This procedure is also described in chapter 5.1 Initial Setting of the instruction manual.

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 RB controller.

Setting procedure for F60 communication settings
  • Stop the controller by pushing the <R/S key for more than 4 seconds (only necessary when the small green lamp above STOP is not lit)
  • Push both the SET and <R/S keys together for more than 4 seconds to enter the engineering setting menu F00
  • Push the /\ key until you reach F60 (the parameter for setting the communication)
  • Press SET: CMPS appears, this is the parameter that selects the communication protocol (the default value is based on the model code, the type of protocol can be ordered with the correct model code):
    • 0: RKC communication ASCII protocol
    • 1: ModBUS: used for almost all CasCade Automation applications (i.e. FryManager)
  • Push SET to store selection. Other parameters appear.
  • Add: device address. Default value 0 (RKC communication) and 1 (ModBUS). With ModBUS 0 cannot be set. (Note: for FryManager applications: set to 2, since 1 is the Resideo burner control unit address)
  • bPS: communication speed:
    • 0: 2400 bps
    • 1: 4800 bps
    • 2: 9600 bps
    • 3: 19200 bps (this is the default value, also the correct value for FryManager applications)
  • bIr: data bit configuration (only used settings are shown in detail):
    • 0: 8 databits, no parity, 1 stopbit (8N1). This is the factory default setting: 8N1 (used for all other applications than the FryManager).
    • 1: 8N2
    • 2: 8 databits, even parity, 1 stopbit (8E1, this is the correct setting for FryManager applications). This was necessary because the Resideo burner control ModBUS communication works with this communication setting.
    • 3: 8E2
    • 4: 8O1
    • 5: 8O2
    • 6: 7N1 (not selectable for ModBUS, only RKC protocol)
    • 7: 7N2(not selectable for ModBUS, only RKC protocol)
    • 8: 7E1 (not selectable for ModBUS, only RKC protocol)
    • 9: 7E2 (not selectable for ModBUS, only RKC protocol)
    • 10: 7O1 (not selectable for ModBUS, only RKC protocol)
    • 11: 7O2 (not selectable for ModBUS, only RKC protocol)
  • Inr: interval time of the communication (msec). Default value is 10 msec (also used for FryManager applications)
  • CMRM: communication error. With two or more errors, the error codes are added together:
    • 0: normal response (no error and default value)
    • 1: overrun error
    • 2: parity error
    • 4: framing error
    • 8: receive buffer overflow

After pushing SET again at CMRM the display returns to the the F parameter list.

Remember to perform a power cycle on the controller, otherwise the new communication parameters are not used!

For more details we advise you to consult the instruction manual detailed description of function block 60 on page 8-133 as well as the communication manual (see link above).

Returning to normal operating display
  • Push SET and <R/S at the same time to return to normal operation.
  • Don’t forget to switch the temperature controller in run mode by pressing the <R/S (run/stop) key for a few seconds.
  • Don’t forget to set ModE back to 0000. This prevents accidental modifications of the controller parameters.
RKC Instrument RB series communication parameters
RKC Instrument RB series communication parameters F60

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