Scaling

Description

This function is used to express a setpoint value in the process value scale defined by PV_INF and PV_SUP (loop parameters).

It takes into account the input range of the setpoint (INP_INFRi, INP_SUPRi) and is applied to the Remote 1 and Remote 2 setpoints.

The Scaling function performs the following calculation:

This function is optional and can be used to track two loops (to cascade two process loops, for example).

In the absence of this function: INP_INFRi = PV_INF and INP_SUPRi = PV_SUP.

Functional diagram of the Scaling function:

Changing the setpoint according to Remote setpoint input

Parameters

Input Parameter:

Parameter	Symbol	Type	Thresholds	Default Value	R/W
Setpoint input	/	%MFi	-3.4E38 / 3.4E38	/	R/W

Internal parameters:

Parameter	Symbol	Type	Thresholds	Default Value	R/W
Low input scale	INP_INFRi	REAL	-3.4E38 / 3.4E38	0.0	R/W
High input scale	INP_SUPRi	REAL	-3.4E38 / 3.4E38	100.0	R/W

Output Parameter:

Parameter	Symbol	Type	Thresholds	Default Value	R/W
Setpoint value	SP	REAL	-3.4E38 / 3.4E38	/	R

Operation Monitoring

Monitoring the parameters of this function is integrated into the error management of the setpoint branch.