5. OPERATION
IMR02L04-E3 5-23
5.5 Autotuning (AT)
The Autotuning (AT) function automatically measures, computes and sets the optimum PID values.
The AT can be used for PID control (Direct/Reverse action), Heat/Cool PID control, and Position
proportioning PID control (Direct/Reverse action).
AT can be activated when the operation is in the Program control mode (RUN) or the Fixed set point control
mode (FIX). During AT, progress of the program is held automatically. When AT is finished, the program
will restart automatically.
When conduct AT at a soak segment
Soak segment
AT starts at 1 hour and 29
minutes before the end of the
Segment time.
(Progress of program is held.)
The duration of the time progress of
program is held during AT is added
to the Segment time.
Segment time
1 hour 30 minutes
AT completion
The program restarts at 1 hour
and 29 minutes before the end
of Segment time.
When conduct AT at a ramp segment
AT activates at the Segment level where AT starts when conducting AT at a ramp segment.
During AT, progress of the program is held automatically.
When AT is finished, the program will restart automatically.
Ramp segment
AT starts at 45 minutes before
the end of the Segment time.
(Progress of program is held.)
Segment time: 1 hour 30 minutes
Segment level: 180
C
AT completion
The program restarts
at 45 minutes before
the end of Segment
time.
Segment level (90
C)
when AT started
The duration of the time progress of program is
held during AT is added to the Segment time.