PID, FLC, ALM and RTO are designed to minimize nuisance deviation alarms due to SP changes. The DV_HI_ACT or DV_LO_ACT parameters available in these blocks are forced to false for a period of time after a setpoint change is made that is large enough to (without the suppression) cause the deviation alarm condition to become active immediately. Changes in SP when the block is in Cas or RCas mode do not impact the calculation.
The ACT parameter is forced to False until the deviation alarm condition would normally be reset (if it had not been suppressed).
For example, if the deviation limit is 2 and a SP change of 3 is made, a deviation alarm would typically occur. However, since this deviation is due to a user SP change, the deviation alarm is disabled until the error (SP-PV) is less than 2.