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Low PV Auto-Tuning
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Auto-Tuning Description
The basic process is same to that of Standard Type AT.
However, the Tuning Point is [SV- 10% of Max. Scale].
1) Other Functions during the Auto-Tuning
•If the Auto Tuning is performed during the program running, the TIME and SV will pause.
After Auto-Tuning is complete, the controller will resume.
•Inner Signal, Time Signal, and Alarm will stop during the Auto-Tuning process.
ON/OFF setting of both Inner Signal and Time Signal will remain unchanged because
TIME and SV is being paused during the Auto-Tuning process.
2) AT Running Display
The AT LED will blink at a 500ms time interval.
3) Changing SV during the Auto-Tuning
If the SV is changed during the Auto-Tuning process, the original Tuning Point (TP) will be maintained
for the duration of the AT process. After Auto Tuning is complete, the controller will change to the new SV.
4) Changing PID Parameter during the Auto-Tuning
The PID values can be changed during the Auto Tuning process. After Auto Tuning is complete,
it will then use the auto-tune calculated PID values. Values changed after Auto-Tuning will
remain unchanged until AT runs again.
5) Abnormal Shutdown of the Auto Tuning process
•If the forced AT shutdown occurs, the PID values will remain unchanged.
•If the error (incl. Burn-out, DC error) occurs, the Auto Tuning process will
stop and the PID values will remain unchanged.
•If the second Auto Tuning cycle exceeds 24 hours, the error message will be displayed.
•Shifting to RESET or MANUAL Control Mode will stop the Auto Tuning process.
6) AT Perform/Cancel
• Method-1
To perform: Turn on AT / or select AUTO on the AT Group.
To cancel: Turn off AT on the AT Group.
• Method-2
To perform : Press both SET and UP key simultaneously longer than 3 seconds on the Operating Display.
To cancel : Press both SET and UP key simultaneously longer than 3 seconds on the Operating Display.
【Ex.2】 If 1.LVL is100'C, 2.LVL is 200'C, SV is 20, PID NO is 3 in Segment-3,
AT is performed at 20'C and the gain value is assigned to PID GROUP-1 (PID NO is ignored).
※ Turn AUTO AT in Program Control mode;
(1.LVL – RL) / 2 + RL: The gain value is assigned to PID GROUP-1.
(2.LVL – 1.LVL) / 2 + 1.LVL: The gain value is assigned to PID GROUP-2.
(RH – 2.LVL) / 2 + 2.LVL: The gain value is assigned to PID GROUP-3.
Содержание NP200
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