47
Parameter to be used
Auto-tuning
Autotuning function
This is the function implemented by the controller itself to automatically
perform ON/OFF control, identify the process, and determine control
constants (P, I, D, Cool, Ar).
Operating procedure
(Autotuning command) Setting
or
in the autotuning
command starts autotuning (during
autotuning,
and the set
value alternate in display on the run
screen). Autotuning terminates
automatically.
Supplementary descriptions
1. There are two types of auto-tuning (AT):
➀
Standard type (including
over-shoot) and
➁
Low PV type (suppressing overshoot).
Type
➀
is the system in which the measured value (PV) exceeds
the set point value (SV) (overshoot) during autotuning. Use this type
where overshoot is permitted.
Type
➁
is the system in which ON-OFF control is provided by
centering upon the value 10% (/full-scale) lower than the set point
value (SV). Use this type where overshoot is to be suppressed.
Setting
Operation
Provides normal control.
Perform auto-tuning while
targeting the present [set
point value (SV)].
Performs auto-tuning while
targeting the present [set
point value (SV) - 10%FS].
(
Autotuning Command)
(Standard
type)
(Low PV
type)
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