MP_VRU_Configuration

This function block is used to configure the VAV actuators VRU-D3-BAC, VRU-M1-BAC and VRU-M1R-BAC (max. 8 slaves). For more information please visit 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. 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;
  bRead_Write      : BOOL;
  dwPassword       : DWORD;
  strDataKL6771    : DataKL6771;
  rMax             : LREAL := 100;
  rMin             : LREAL;
  bSetpointSource  : BOOL;
  bOperationMode   : BOOL := TRUE;
  nSensor1Type     : E_MP_VRU_Sensor1Type := MPBus_VRU_Sensor_Active;
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.
bRead_Write	BOOL	If FALSE then READ only; if TRUE then READ and WRITE.
dwPassword	DWORD	The password for the actuators. Usually 0x0000.
strDataKL6771	DataKL6771	The data structure with which the KL6771() function block must be linked.
rMax	LREAL	Max in % (20...100 %).
rMin	LREAL	Min in % (0...rMax). rMin must be smaller than rMax.
bSetpointSource	BOOL	TRUE = bus; FALSE = analog
bOperationMode	BOOL	TRUE = overpressure; FALSE = underpressure
nSensor1Type	E_MP_VRU_Sensor1Type	Sensor 1 type

Outputs

VAR_OUTPUT
  bBusy                  : BOOL;
  bError                 : BOOL;
  iErrorId               : MP_Error;
  rNominalVolumeticFlow  : LREAL;
  rNominalDeltaPressure  : LREAL;
  rMinRead               : LREAL;
  rMaxRead               : LREAL;
  bSetpointSourcesRead   : BOOL;
  bOperationModeRead     : BOOL;
  nSensor1TypeRead       : E_MP_VRU_Sensor1Type;
  nApplication           : E_MP_VRU_Application;
  bControlMode           : BOOL;
  nRoomPressureCascade   : E_MP_VRU_RoomPressureCascade;
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.
rNominalVolumeticFlow	LREAL	Nominal volume flow in m³/h (0...60,000).
rNominalDeltaPressure	LREAL	Nominal differential pressure in Pa (0...10,000).
rMinRead	LREAL	Min in % (0...rMax). rMin must be smaller than rMax.
rMaxRead	LREAL	Max in % (20...100 %).
bSetpointSourcesRead	BOOL	TRUE = bus; FALSE = analog
bOperationModeRead	BOOL	TRUE = overpressure; FALSE = underpressure
nSensor1TypeRead	E_MP_VRU_Sensor1Type	Sensor 1 type
nApplication	E_MP_VRU_Application	Visualization of the application selected by the manufacturer.
bControlMode	BOOL	Visualization of the control function selected by the manufacturer. TRUE = volume flow rate control; FALSE = position control.
nRoomPressureCascade	E_MP_VRU_RoomPressureCascade	Room pressure cascade control

Requirements

Development environment	required TC3 PLC library
TwinCAT from v3.1.4024.22	Tc2_MPBus from 3.4.13.0