Filtering of First Order

Description

This function filters the first order with a time constant T. The filter transfer function is as follows:

This first order filter is directly applied to the input process value.

Function Parameters

Input Parameter:

Parameter	Symbol	Type	Thresholds	Default Value	R/W
Input Enabled	PV_SIM	INT	-32768 / 32767	0	R/W

Internal parameters:

Parameter	Symbol	Type	Thresholds	Default Value	R/W
Filtering time (ms)	T_FILT	REAL	0.0 / 3.4E38	0.0	R/W
Gain	GAIN_FILT	REAL	-3.4E38 / 3.4E38	1.0	R/W

Output Parameter:

Parameter	Symbol	Type	Thresholds	Default Value	R/W
Output value	FILT_OUT	REAL	-3.4 E38 / 3.4E38	/	R

NOTE: If the function is not selected, the filter output value is the same is as its input value.

Execution Monitoring

Monitoring the parameters of this function is integrated into the error management of the process value branch. If the time constant is negative, its value is set at 0.0.