Setpoint Rate Limiting
PID and AO Function Blocks
©2007Fisher-Rosemount Systems, Inc.
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Setpoint Rate Limiting
Setpoint Rate Limits, Working Setpoint Parameters
Setpoint
Setpoint Rate Limits
Working Setpoint
©2007Fisher-Rosemount Systems, Inc.
Slide 1- 2
Setpoint Rate Limiting
Example – Setpoint Rate Limiting in PID Block
Setpoint change response with no PID setpoint limiting
PID SP_RATE_UP of 0.01
PID SP_RATE_DN of 0.04
©2007Fisher-Rosemount Systems, Inc.
Slide 1- 3
Setpoint Rate Limiting
Example – Setpoint Rate Limiting in AO Block
Setpoint change response with no AO setpoint limiting
AO SP_RATE_UP of 0.05
AO SP_RATE_DN =0 (no limiting)
AO working setpoint
©2007Fisher-Rosemount Systems, Inc.
Slide 1- 4
Setpoint Rate Limiting