Pixsys ATR 121, User Manual

Page: 15 / 41

User manual - ATR121/141 -
15
9 Tuning
Tuning procedure allows to calculate PID parameters to obtain
a good regulation. It means a stable control of temperature/
process on setpoint without fluctuations and fast response to
deviations from setpoint caused by external noises.
Tuning procedure includes calculation and setting of the
following parameters:
• Proportional band (system inertia in °C if temperature).
• Integral time (system inertia expressed in time).
• Derivative time (defines the intensity of the controller
reaction to the variation of the measured value, normally ¼
of integral time).
During Tuning procedure, it is not possible to change the
setpoint.
9.1 Auto-tune
Tuning procedure calculates the controller parameters and can
be manual or automatic according to selection on par. 27 tun
| tune.
9.2 Manual tuning
Manual procedure allows the user greater flexibility to decide
when to update PID algorithm parameters. It can be enabled
selecting Man on par. 27
tu n
|
tu n e
.
•Tuning launch:
Press
FNC
, display shows
t. o f
, pressing it visualizes process
value and
tu n
|
tu n e
(alternately) up to procedure completion
(it can take some minutes). To cancel procedure press
FNC
and
after to select
t. o f
.