6-10
<Toc>
<6. Parameters>
IM 05E01D02-41E
1st Edition : May 31,2000-00
●
When PID Constants are Selected According to the Deviation (See “
■
PID
Switching (Zone PID)” below)
Setting of
AT Parameter
The setpoints when auto-tuning is started
4
Determines the values of 4.P, 4.I and 4.D parameters by auto-tuning.
Auto-tuned Setpoint
Remarks
NOTE
Set the maximum and minimum values, as close as possible to those of the actual range to
be controlled, in the Maximum Value of PV Input Range (RH) and Minimum Value of PV
Input Range (RL) parameters. Otherwise, the controller may fail to determine the optimum
values when auto-tuning is carried out.
■
PID Switching (Zone PID)
The UP350 carries out control by automatically switching between groups of PID constants
according to the temperature zone. You can set a maximum of three temperature zones.
When shipped from the factory, the UP350 is configured so that it operates in zone 1 only
and using only one group of PID constants.
●
When One Group of PID Constants is Used (factory-set default)
As shown in the figure below, the controller uses one group of PID constants over the
range from the minimum value to the maximum value of the PV input range.
1st group of
PID constants
PV
input value
Maximum value of PV
input range (RH)
Minimum value of PV
input range (RL)
Program setpoint
Segment 1
Segment 2
<Controller Settings>
•
Configure the 1st group of PID constants (1.P, 1.I and 1.D operating parameters).
Summary of Contents for UP350
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