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10-1 Starting Auto-tuning
Auto-tuning can be started by using the following procedure. Use this procedure
when appropriate results are not achieved via fuzzy self-tuning.
1, 2, 3...
1. Turn ON pin 3 of the function selector switch to select the advanced PID con-
trol mode (refer to
Section 2-3-5
).
2. Press the Level Key and the Display Key simultaneously for 1 s or longer to
start auto-tuning.
10-2 Conditions that Prevent Auto-tuning
You will not be able to start auto-tuning when any of the following conditions ex-
ist.
• When the control mode is set for ON/OFF control or advanced PID control with
fuzzy self-tuning.
• When an engineering level parameter is displayed.
• When the key protection switch is set to SP
or ALL.
• When the remote/local setting is set to remote.
• When the RUN/STOP setting is set to STOP.
• When a sensor error, memory error, or A/D converter error has occurred.
10-3 Force-ending Auto-tuning
Auto-tuning will be forced to end for any of the following conditions.
• When the Temperature Controller is turned off.
• When the RUN/STOP setting is changed to STOP.
• When a sensor error occurs.
• When the Level Key and the Display Key are pressed simultaneously for 1 s or
longer.
10-4 Changing Parameters during Auto-tuning
• Parameters cannot be changed during auto-tuning, but the remote/local set-
ting can be changed.
• The SP also cannot be changed via the event input during auto-tuning, but the
event input status can be changed and the SP will be changed after auto-tun-
ing has been completed.
Set point
Auto-tuning
Auto-tuning started.
Scale changes disabled here.
Event input
terminal
Open
SP0 selected.
Shorted
SP1 selected.
SP0
SP1
Changing Parameters during Auto-tuning
Section 10-4
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