Derivative Action Selection Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

1.15

Derivative Action Selection Function

This function improves dynamic characteristics by selecting a suitable derivative action for fixed value actions or ramp
actions.
Action
Each type of derivative action operates as shown below.
Setting of "Derivative action
selection"
Measured Value Derivative (0)
Deviation Derivative (1)
Setting method
Configure the setting as follows:
[Navigation window]  [Parameter]  Target module  [Application Setting]  [Derivative action selection]
Action
Fixed value action
Disturbance
Fixed value action
Disturbance
This setting effectively prevents
the temperature from being
Ramp action
affected by a disturbance.
However, the performance to
Set value (SV)
follow the set value can be low.
Temperature
process value
(PV)
This setting allows the
temperature to follow the set
Ramp action
value well. However, the
temperature get affected by a
Set value (SV) disturbance greatly.
Temperature
process value
(PV)
1.15 Derivative Action Selection Function
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