Despatch P1400+ Temperature Controller - Manual (Page 34)

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Table 6. Lock Code – Entry and Default Values
Description Upper/Main
Display
Lower Display
Default values are:
Automatic Tune Mode =
0000
Set-up mode =
10 10 10 10
Configuration Mode =
20 20 20 20
.
0 ULoc
7.2 Automatic Tune Mode
Automatic Tune Mode is selected when it is desired to use the Pre-tune and Self-tune facilities on a
controller to assist the user in setting up Proportional band, Integral and Derivative parameter
values. Refer to the following
Automatic Tune Mode table.
Pre-tune can be used to set Controller PID parameters approximately. Self-tune may then be used
to optimise the tuning. Pre-tune can be set to run automatically after every power-up using the Auto
Pre-Tune APt parameter in Setup Mode.
The AT indicator will flash while pre-tune is operating, and is continuously on while Self-
tune is operating. If both Pre-tune and Self-tune are engaged the AT indicator will flash until Pre-
tune is finished, and is then continuously on.
Navigating in Automatic Tune Mode
Press to select the next parameter in the table and or to set the value required.
Hold down and press to return to Select Mode.
Note:
If there is no key activity for 2 minutes the controller automatically returns to operator mode