MP_OperatingUnit

This function block is used to read room sensors of types P-22Rxx-1900x-1. It is compatible with 22Rxx-19-1 room sensors produced as of May 2022 (before May 2022, see MP_RoomSensor).
For more information, see www.belimo.com.

MP_Address is used to specify the MP-Bus device with which the function block is to communicate. bStart activates communication with the MP-Bus device. bBusy indicates that the function block is active. If bStart remains TRUE, the device is addressed cyclically with a period specified by the time in TMPolling. The time should be set longer than 1 second. bError is used to indicate an error in communication with the actuator. The type of the error can be read with iErrorId.

Inputs

VAR_INPUT
  MP_Address     : USINT := 1;
  bStart         : BOOL;
  strDataKL6771  : DataKL6771;
  TMpolling      : TIME := t#10s;
END_VAR

Name	Type	Description
MP_Address	USINT	MP-Bus address of the slave.
bStart	BOOL	A positive edge starts the function block. If this remains continuously TRUE, the function block will be activated cyclically with a period specified by the time in TMPolling.
strDataKL6771	DataKL6771	The data structure with which the KL6771() function block must be linked.
TMpolling	TIME	The time for which the function block should address the actuator. Default 10 s, minimum time 1 s.

Outputs

VAR_OUTPUT
  bBusy                        : BOOL;
  bError                       : BOOL;
  iErrorId                     : MP_Error;
  bSensorFaultTemp             : BOOL;
  bSensorFaultHumidity         : BOOL;
  bSensorFaultCO2              : BOOL;
  fSensTemp                    : LREAL;
  fHumid                       : LREAL;
  uiCO2                        : UINT;
  nAirQualityStatus            : E_MP_AirQualityStatus;
  bSensorError                 : BOOL;
  fDewPoint                    : LREAL;
  fVentilationStage            : LREAL;
  nSystemOperationMode         : E_MP_SystemOperationMode;
  bVentilationStageControlMode : BOOL;
  bTempSetpointType            : BOOL;
  fSetTemp                     : LREAL;
  stSensorType                 : STRING;
END_VAR

Name	Type	Description
bBusy	BOOL	This bit is set for as long as the function block is active.
bError	BOOL	This output goes TRUE as soon as an error occurs. This error is described via the iErrorId variable.
iErrorId	MP_ERROR	This output outputs an error code in the event of an error. bError goes TRUE at the same time.
bSensorFaultTemp	BOOL	Temperature sensor has a fault
bSensorFaultHumidity	BOOL	Humidity sensor has a fault.
bSensorFaultCO2	BOOL	CO2 sensor has a fault.
fSensTemp	LREAL	Room temperature in °C or °F (0..50 or 32..122).
fHumid	LREAL	Relative air humidity in % (0..100).
uiCO2	UINT	CO2 value in ppm (0..2000).
nAirQualityStatus	E_MP_AirQualityStatus	Air quality status
bSensorError	BOOL	One of the sensors has an error.
fDewPoint	LREAL	Dew point temperature in °C (-50...50).
fVentilationStage	LREAL	Ventilation stage in % (0..100).
nSystemOperationMode	E_MP_SystemOperationMode	Operation mode of the system
bVentilationStageControlMode	BOOL	FALSE = Manual; TRUE = Automatic.
bTempSetpointType	BOOL	FALSE = Absolute; TRUE = Relative
fSetTemp	LREAL	bTempSetpointType FALSE = setpoint room temperature in °C; bTempSetpointType TRUE = setpoint relative room temperature in °C.
stSensorType	STRING	DSensor type. '?' = not read; 'unknown' = number unknown.

Requirements

Development environment	required TC3 PLC library
TwinCAT from v3.1.4024.46	Tc2_MPBus from 3.6.1.0