Auto-Tuning - Autonics TK4S User Manual

6.3.4

Auto-tuning

In PID control, auto-tuning processes the control subject's thermal characteristics and
thermal response rate, and then determines the necessary PID time constant. Application
of the PID time constant realizes fast response and high precision temperature control.
6.3.4.1 Auto-tuning Start/Stop Setting [PAR2 → AT]



Setting
Group
PAR2
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Auto-tuning automatically stores PID time constants upon termination. These PID
time constants can then be modified by the user to suit their usage environment.
When auto-tuning is in progress, the AT lamp located on the front of the controller
flashes in 1-second intervals. When auto-tuning finishes, the AT lamp automatically
goes off and the auto-tuning parameter will return to OFF.
When auto-tuning is in progress and digital input (, ) feature is RUN/STOP
or AUTO/MANUAL, auto-tuning will be automatically ended, if concerned DI is
inputted or a sensor disconnection error occurs. (Restored the PID used prior to the
auto-tuning session)_
Setting
Auto-tuning complete.
OFF
Auto-tuning in progress.
ON
Parameter
AT
Manual interruption or a sensor disconnection error when auto-tuning

is in progress restores the PID time constant to the value used prior to
the auto-tuning session.
Auto-tuning continues to run even if the temperature reading exceeds

or falls below the input range.
When auto-turning is in progress, parameters can only be referenced

and not altered.
Auto-tuning is not available in manual control.

6 Parameter Settings and Functions
Description
Setting Range
OFF/ON
Factory
Unit
Default
OFF -
75