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- P-BAND : If compared ratio is large, the control output for deviation is small, therefore the time
taken to reach the set value is delayed. If compared ratio is narrow, then the control
output is large, so the set value is reached faster, but the overshoot increases.
- I-TIME : Shows the integral time. Cannot prevent generation of deviation only by ratio control.
To remedy this, the deviation is reduced by integral operation. If integral time is too long,
the reflected ratio gets too small, and if integral time is short, the hunting generation increases.
- D-TIME : Shows the integral time. This is counter action against rapid change. Adjusts in
accordance to the rate of change. Greater the differential time, stronger the adjustments.
- DEAD BAND : During heating/cooling control, setup the size of the output on the intersection of
heating side and the cooling side. In order to improve controllability, it is
recommended to setup so the heating and cooling are slightly overlapped. (Minus)
- A/T GAIN : When controlling using PD GAN value that is auto tuned, according to the user's
preference (whether faster following is wanted, or slight overshoot is wanted in place
of speed), adjust reflection ratio for differential/integral time. If less than 1, then response
gets faster but overshoot increases and hunting gets worse. If greater than 1,
the response is slower, but the overshoot and hunting reduces.
Change of control characteristic depend on A/T GAIN (PV)
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