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FX2N-2LC Temperature Control Block
7.2.20
BFM #36 (CH1) and BFM #55 (CH2): Control response parameter
In BFM #36, set the control response parameter of CH1. In BFM #55, set the control response
parameter of CH2.
The control response parameter selects the response to changes in the temperature set value
(SV) in PID control among three steps (slow, medium and fast).
When BFM #36/#55 is set to "K0", the response becomes slow speed.
When BFM #36/#55 is set to "K1", the response becomes medium speed.
When BFM #36/#55 is set to "K2", the response becomes fast speed.
The figure below shows the operation at each setting.
Measured value (PV)
Temperature
set value (SV) 2
Changed
Temperature set
value (SV) 1
In order to increase the response speed of the control target to changes in the temperature set
value (SV), select "fast".
In this case, however, a little overshoot cannot be avoided.
Overshoot is not desirable in some control targets. In order to prevent overshoot, select "slow".
Fast
Temperature set value (SV)
change point
Buffer Memory (BFM) 7
Medium
Slow
Time
7
7-11
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