MP_SR_actuator_Process

This function block is suitable for SR actuators. 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. 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.

	Restrictions This function is called only if the corresponding “Configuration” function block is not executed.

Inputs

VAR_INPUT
  MP_Address             : USINT := 1;
  bStart                 : BOOL;
  strDataKL6771          : DataKL6771;
  TMpolling              : TIME := t#10s;
  rSetpointRel_Write     : LREAL;
  nOverrideControl_Write : E_MP_SR_OverrideControl;
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.
rSetpointRel_Write	LREAL	Setpoint in % (0…100).
nOverrideControl_Write	E_MP_SR_OverrideControl	Override the setpoint with defined values.

Outputs

VAR_OUTPUT
  bBusy               : BOOL;
  bError              : BOOL;
  iErrorId            : MP_Error;
  strMP_Serial_Number : MP_Serial_Number;
  rSetpointRel        : LREAL;
  rPositionRel        : LREAL;
  rPositionAbs        : LREAL;
  nOverrideControl    : E_MP_SR_OverrideControl;
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.
strMP_Serial_Number	MP_Serial_Number	Structure for the serial number.
rSetpointRel	LREAL	Setpoint in % (0…100).
rPositionRel	LREAL	Relative position with respect to the nominal range, in % (0…100).
rPositionAbs	LREAL	Absolute position refers to the actual position within the mechanical range. Rotation in ° (0…95) or linear in mm (0…600).
nOverrideControl	E_MP_SR_OverrideControl	Setpoint override.

Requirements

Development environment	PLC library to include
TwinCAT from v3.1.4024.77	Tc2_MPBus from 3.8.1.0