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 s. bError is used to indicate an error in communication with the actuator. The type of the error can be read with iErrorId.

VAR_INPUT

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

MP_Address: MP-Bus address of the slave.

bStart: 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: the data structure with which the KL6771() function block must be linked (see DataKL6771).

TMpolling: the time for which the function block should address the actuator. Default 10 s. Minimum time 1 s.

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;

bBusy: this bit is set for as long as the function block is active.

bError: the output becomes TRUE as soon as an error occurs. This error is described via the iErrorId variable.

iErrorId: this output outputs an error code in the event of an error (see MP_ERROR). bError goes TRUE at the same time.

bSensorFaultTemp: temperature sensor has a fault.

bSensorFaultHumidity: humidity sensor has a fault.

bSensorFaultCO2: CO2 sensor has a fault.

fSensTemp: room temperature in °C or °F (0..50 or 32..122).

fHumid: relative humidity in % (0..100).

uiCO2: CO2 value in ppm (0..2000).

nAirQualityStatus: air quality status (see E_MP_AirQualityStatus).

bSensorError: one of the sensors has a fault.

fDewPoint: dew point temperature in °C (-50..50).

fVentilationStage: ventilation stage in % (0..100).

nSystemOperationMode: operation mode of the system (see E_MP_SystemOperationMode).

bVentilationStageControlMode: FALSE = manual; TRUE = automatic.

bTempSetpointType: FALSE = absolute; TRUE = relative.

fSetTemp: bTempSetpointType FALSE = setpoint room temperature in °C; bTempSetpointType TRUE = setpoint relative room temperature in °C.

stSensorType: DSensortyp. '?' = not read; 'unknown' = number unknown.