Omron E5C User Manual page 123

Limit Cycle MV Amplitude
The Limit Cycle MV Amplitude parameter sets the MV amplitude for limit cycle operation during
auto-tuning.
* This setting is disabled for 100% AT.
40% AT
• The width of MV variation in the limit cycle can be changed in the Limit Cycle MV Amplitude
parameter, but the AT execution time may be longer than for 100% AT. The limit cycle timing varies
according to whether the deviation (DV) at the start of auto-tuning execution is less than 10% FS.
Deviation ≥ 10% FS
PV
SP
AT started
100% AT
• Operation will be as shown in the following diagram, regardless of the deviation (DV) at the start of
AT execution. To shorten the AT execution time, select 100% AT.
PV
SP
AT started
The 100% autotuning is executed.
Operating Procedure
1
Press the M Key several times in the Adjustment Level to dis-
play at (AT Execute/Cancel).
2
Press the U or D Key to select at-2 (100% AT execute).
* The TUNE indicator will light during autotuning.
3
When AT ends, the AT Execute/Cancel parameter is set to off.
E5@C Digital Temperature Controllers User's Manual (H174)
000
Limit Cycle MV PV
Amplitude 40%
SP
Deviation:
10% FS
Time
AT ended
Limit Cycle MV
Amplitude 100%
Time
AT ended
* The Limit Cycle MV Amplitude parameter is disabled.
Deviation < 10% FS
Limit Cycle MV
Amplitude 40%
Deviation:
10% FS
Time
AT started
AT ended
4 Basic Operation
Adjustment Level
at
AT Execute/
Cancel
off
at
at-2
Adjustment Level
at
AT Execute/
Cancel
off
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