Setpoint Limiter
(Original Document)
About us
Description
When this function is activated, the scaling is only done in the range limits, defined by the parameters SP_MIN and SP_MAX. When this function is not activated, the setpoint value is limited to the physical scales of the regulation loop.
The interval (SP_MIN / SP_MAX) must be included in the interval (PV_INF / PV_SUP).
The interval [SP_MIN / SP_MAX] must be in the interval (PV_INF / PV_SUP).
Parameters
Input Parameter:
Parameter
Symbol
Type
Thresholds
Default Value
R/W
Setpoint Value
SP
REAL
-3.4E38 / 3.4E38
/
R
Internal parameters:
Parameter
Symbol
Type
Thresholds
Default Value
R/W
Low setpoint limit
SP_MIN
REAL
-3.4E38 / 3.4E38
0.0
R/W
High setpoint limit
SP_MAX
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
Execution Monitoring
Monitoring the parameters of this function is integrated into the error management of the setpoint branch.
If SP_MIN >= SP_MAX, SP_MIN < PV_INF or SP_MAX > PV_SUP, the setpoint output remains unchanged and a bit is set to state 1 in the status words.