The Limit (LIM) function block limits an input value between two reference values. The block supports signal status propagation. There are no modes or alarm detection in the Limit function block.
IN is the analog input value and status.
OUT is the analog output value and status.
LIM_INDICATOR is set True (1) when the input is limited to the maximum value. It remains True until the input is limited to the minimum value, at which time it is set False (0).
OUT_LO_ACT is a Boolean value set True when the input is limited to the minimum value.
OUT_HI_ACT is a Boolean value set True when the input is limited to the maximum value.
The following figure shows the internal components of the Limit function block:
