Simplicity on the Worksite
Solutions Guide for FAQs: E5
@
N
Using PID Control
3-6
Using PID Co
n
trol
Problems with 100% Autotuning (AT-2)
If autotuning at 100% (AT-2) does not produce the desired results, you can also execute autotuning at
40% (AT-1).
●
Autotuning at 40% (AT-1)
A 40% variation in the manipulated variable of the limit cycle is used for autotuning. Executing 40%
autotuning may require more time than executing 100% autotuning (AT-2).
The limit cycle timing varies according to whether the deviation (DV) at the start of autotuning execution is
less than 10% FS.
Reference Information: PID Control
Deviation
≥
10% FS
PV
SP
Limit Cycle MV
Amplitude: 40%
Deviation: 10% FS
AT started.
AT ended.
Time
Deviation < 10% FS
PV
SP
Limit Cycle MV
Amplitude: 40%
Deviation: 10% FS
AT started.
AT ended.
Time
Summary of Contents for E5*N Series
Page 31: ...MEMO ...
