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(20)CH Output variation limiter setting (Un\G44, Un\G76, Un\G108,
Un\G140)
Set the limit of an output variation per 1s to regulate a rapid change of the manipulated value (MV).
(a) Setting range
The setting range is 0 or 1 to 1000 (0.1%/s to 100.0%/s). When 0 is set, an output variation is not regulated.
Ex.
When the value of the buffer memory is set as follows
•CH Output variation limiter setting (Un\G44, Un\G76, Un\G108, Un\G140): 10(1.0%/s)
The output changes by 0.5% per 500ms because the sampling cycle is 500ms. If the manipulated value
(MV) rapidly changes by 50%, the variation is regulated to 1%/s. Therefore, it takes 50s until the output
actually changes by 50%.
(b) Two-position control ( Page 166, Section 4.3 (1))
The setting is invalid.
(c) Manual control ( Page 175, Section 4.5)
The setting is enabled.
(d) Auto tuning function execution ( Page 176, Section 4.6)
The setting is enabled, but some change in Output variation limiter setting during auto tuning does not lead to a
calculation of the appropriate PID constants. During auto tuning, therefore, no adjustment for output variation is
recommended.
(e) Default value
The default values are set to 0 in all channels.
Common
100%
50%
0%
Set value (SV)
80%
500ms
0.5%
50%
Manipulated value
(MV)
Manipulated
value (MV)
increased
by 50%
When setting
CH
Output variation limiter setting
(Un\G44, Un\G76, Un\G108, Un\G140)
to 10 (1.0%/s)