Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 148

CH1 Output change ratio limiter
Set the limit of the output variation amount per 1s to regulate a rapid change of the manipulated value (MV).
■Buffer memory address
The following table shows the buffer memory address of this area.
Buffer memory name
CH Output change ratio limiter
CH Output change ratio limiter (If using FX3 allocation mode)
■Setting range
The setting range is 0 or 1 to 1000 (0.1 to 100.0%/s). When 0 is set, the output variation amount is not regulated.
Ex.
When the following values have been set in the buffer memory areas
When 'CH1 Output change ratio limiter' (Un\G510) has been set to 10 (1.0%/s) and the sampling period is 500ms, an output
value changes by 0.5% per 500ms. When the sampling period is 250ms, an output value changes by 0.2% or 0.3% per
250ms. Thus, even though the manipulated value (MV) rapidly changes by 50%, the variation amount is regulated to 1%/s.
Thus, even though the manipulated value (MV) rapidly changes by 50%, the variation amount is regulated to 1%/s.
100%
80%
Manipulated value
(MV)
50%
0%
(1) When 'CH1 Output change ratio limiter' (Un\G510) has been set to 10 (1.0%/s)
■Two-position control
The setting is ignored.
■Manual control
The setting is enabled.
■At the execution of the auto tuning
The setting is enabled. However, when the output change ratio limiter setting is changed during the auto tuning, appropriate
PID constants may not be calculated. Therefore, adjusting the output variation amount during the auto tuning is not
recommended.
■Default value
The default value is 0.
APPX
146
Appendix 4 Buffer Memory Areas
Manipulated
value (MV)
50% increase
Set value (SV)
CH1 CH2
510 710
67 107
(1)
50%
0.5%
500ms
CH3 CH4
910 1110
147 187