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Advanced Mode
Parameters register range: S3~S3+69, among them S3~S3+7 and S3+8~S3+11 need to be set
by users; S3+16~S3+69 are occupied by system, users can’t use them.
Sample time[S3]
The system samples the current values according to some certain interval and compares them
with the output value. This time interval is the sample time T. There is no requirement for T
during DA output; T should be larger than one PLC scan period during port output. T value
should be chosen among 100~1000 times of PLC scan periods.
PID Operation Zone[S3+6]
PID control is entirely opened at the beginning and close to the target value with the highest
speed(default value is 4095), when it entered into the PID computation range, parameters Kp,
TI, TD will be effective.
See graph below:
If the target value is 100, PID operation zone is 10, and then the real PID’s operation zone is
from 90~110.
Death Region [S3+7]
If the measured value changed slightly for a long time, and PID control is still in working
mode, then it belongs to meaningless control. Via setting the control death region, we can
overcome this situation. See graph below:
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