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Parameters
Adaptive Control (adpt)
If the Adaptive Control parameter is set to anything except off (Disabled), control is performed
with the PID constants for adaptive control.
After you set this parameter, perform either 40% or 100% auto-tuning.
After auto-tuning is completed, stop control (STOP or turn OFF the power supply), allow the
temperature to drop sufficiently, and then start control (RUN) again.
If you do, operation will be performed according to the setting of the Adaptive Control parameter,
as described below.
• Setting Value of auto (Automatic Update)
System performance is evaluated and the PID constants for adaptive control are updated auto-
matically. This enables continuous control with the optimum PID constants. The
flashes during system performance evaluation and goes out when evaluation is completed.
• Set Value of info (Notification)
If system fluctuations occur after system performance is evaluated, the PID constants for adaptive
control are updated by the user.
This setting can be used so that the user can confirm changes in the environment or deterioration
in equipment.
A
The
indicator flashes during system performance evaluation. If the PID constants need to be
updated, the
or deterioration in equipment. If the fluctuation in the system is small, the
but the adaptive control PID constants will be calculated.
To update the PID constants, the user changes the setting of the a-ud (PID Update) parameter
described below to on (Update). The notification display (
system performance is evaluated.
AT
First system
AT execution
completed.
performance
in progress
evaluation
The A
indicator
The TUNE
The TUNE
flashes.
indicator is
indicator is
lit.
not lit.
• Set Value of fix (Fixed)
System performance is not evaluated.
Use this setting when you want to calculate the PID constants for adaptive control with auto
(Automatic update) or info (Notification), and then perform control with the calculated PID
constants for adaptive control without changing them. If the set value is fix (Fixed), you can dis-
play and check the SP response PID constants and disturbance PID constants in the Adjustment
Level.
A
The
indicator will remain not lit.
• Set Value of off (Disabled)
Adaptive control is disabled. Operation uses 2-PID control.
E5@D Digital Temperature Controllers User's Manual (H224)
A
indicator will light to provide notification of changes in the operating environment
Second system
Third system
performance
performance
evaluation
evaluation
The A
indicator
The A
The A
flashes.
indicator
indicator
is not lit.
is not lit.
indicator) will appear the third time
A
System fluctuation
notification
The A
The A
indicator
indicator
is lit.
flashes.
5 Advanced Operations
A
indicator
A
indicator will not light,
PID updated by the user.
The A
indicator
is not lit.
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