Output Change Ratio Limiter Function; Control Output Flag - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

4.26

Output Change Ratio Limiter Function

The output change ratio limiter functions to limit the amount of change in the manipulated value (MV) per unit time (1s).
Control outputs can be limited using the output change rate that has been set.
Outputs are based on set tendencies without the manipulated value (MV) changing suddenly during operations mode travel
(when outside the proportional band) or when the set value (SV) changes (when the change is large).
Upper limit output limiter
Manipulated value (MV)
Sudden change
to manipulated
value
Manipulated value (MV)
Lower limit output limiter
Setting method
Configure the settings as described below.
[Navigation window]  [Parameter]  Target module  [Module Parameter]  [Application Setting]  [Limiter setting]
Precautions
• Reducing the output change ratio limiter value (reducing the tendency) slows the control response. Further, differential
effects are eliminated.
• The output change ratio limiter is disabled during 2-position control implementation.
• If a value other than 0 is set in the output change ratio limiter and auto tuning is implemented, a suitable PID constant may
not be obtainable.
4.27

Control Output Flag

This function monitors the ON and OFF status of the control outputs.
If internal outputs are selected in the control outputs, transistor outputs for the temperature control module will be
implemented.
If external outputs is selected in the control outputs, the output status uses the time proportional calculation results.
Checkable using the "CH1 Transistor output flag" (Un\G405).
4 FUNCTION
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4.26 Output Change Ratio Limiter Function
If the output change rate limiter is not set
Go to operation /Change set value (SV)/Sudden
output change due to noise, etc.
0.1 to 100.0%
1 s
Set the percentage amount of
change to the manipulated
value per second.