K&R ACD320 Series, Руководство пользователя

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ACD320 user manual Parameter Description
- 90-
interference.
Function Code Name Setting Range
Default
Value
F4.25 Sampling cycle time (T) 0.01 ～ 100.00s 0.10s
F4.26
PID control discrepancy
limit
0.0 ～ 100.0% 0.0%
Sampling time (T): is the time to sample the feedback value. In each sampling period the
controller runs one time. The longer the sampling time, the slower the responding.
PID control discrepancy limit: the allowable maximum discrepancy of PIDsystem output
value relative to the closed-loop assigned value.As shown in following diagram,within the
discrepancy limit, PID controller stops adjustment. Properly setting this function code can
improve the accuracy and stability of PIDsystem.
Fig. 6-19 Coincidence relation of discrepancy limit and output frequency
Function Code Name Setting Range
Default
Value
F4.27 Feedback disconnection
detecting value
0.0
～
100.0% 0.0%
F4.28 Feedback disconnection
detecting time
0.0 ～ 3600.0s 1.0s
Feedback disconnected detecting value: this detecting value is relative to the full range
(100%).
The system detects the PID feedback value all the time.When the feedback value is less or
equal to the feedback disconnected detecting value, the system starts to time the detection.When