8. PARAMETER DESCRIPTION
IMR02C15-E4
8-128
Dummy
F51
Derivative action
Use to select the action of derivative term.
Data range Factory set value
0: Measured value derivative
1: Deviation derivative
0
Related parameters
Parameter setting mode:
• Autotuning (AT) (P. 8-24)
Description of function
Measured value derivative: PID control putting emphasis on response most adaptive to fixed set point
control (mode)
Overshoot
Disturbance
Measured value derivative (PID control)
Set value (SV)
Disturbance
Measured value (PV)
Deviation derivative: PID control putting emphasis on follow-up most adaptive to ramp control
or cascade control using a ratio of setting change limiter, etc. It is
effective to restrict speed deviation in ramp control and to restrict the
amount of overshooting when changed to “soak” from “ramp.”
Follow-up
Deviation derivative (PID control)
Follow-up
Set value (SV)
Measured value (PV)
dTP
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