Three-point controller L/H

This function block is used to implement a three-point controller.

Inputs
FU	Enable AU	Enable Output AU. The output is enabled when input 1 is present. This input is optional. If the input is not connected, the output is automatically enabled.
FO	Enable AO	Enable Output AO. The output is enabled when input 1 is present. This input is optional, if the input is not connected, the output is automatically enabled.
IW	Actual value	Actual value
SU	Setpoint below	Setpoint below. If the actual value falls below this limit, output AU is switched on.
SO	Setpoint above	Setpoint above. If the actual value exceeds this limit, output AO is switched on.
Outputs
AU	Setpoint below	Setpoint below
AO	Setpoint above	Setpoint above
ST	Temperature error	Temperature error
Parameter
Regulation time		Regulation time in seconds. The target/actual comparison is only executed in this interval.
Temperature monitoring Minimum		Optional temperature monitoring. If the actual value falls below this limit, the output ST fault temperature is set to 1 and the outputs are switched off. If both limit values are 0, monitoring is not active.
Temperature monitoring Maximum		Optional temperature monitoring. If the actual value exceeds this limit, the output ST temperature fault is set to 1 and the outputs are switched off. If both limit values are 0, monitoring is not active.

Inputs