Manual Setup - Omron E5CZ User Manual

Determining PID Constants (AT, ST, Manual Setup)
3-8-3

Manual Setup

Operating Procedure
Adjustment Level
AT execute/
at
cancel
off
Proportional
C
p
band
8.0
C
p
10.0
Integral time
i
233
i
250
Derivative time
d
40
d
45
46
Individual PID constants can be manually set in the "proportional band," "inte-
gral time," and "derivative time" parameters in the adjustment level.
In this example, the "proportional band" parameter is set to 10.0, the "integral
time" parameter to 250, and the "derivative time" parameter to 45.
1. Press the O key to move from the operation level to the adjustment level.
2. Press the M key to select the "proportional band" parameter.
3. Use the U and D keys to set 10.0.
4. Press the M key to select the "integral time" parameter.
5. Use the U and D keys to set 250.
6. Select the "derivative time" operation by pressing the M key.
7. Use the U and D keys to set 45.
8. To return to the operation level, press the O key.
Note Proportional Action
When PID constants I (integral time) and D (derivative time) are set to 0, con-
trol is executed according to proportional action. As the default, the center
value of the proportional band becomes the set point.
Related parameter: Manual reset value (adjustment level)
When P (Proportional Band) Is Adjusted
Increased
Set
value
Decreased
Set
value
Section 3-8
The curve rises gradually, and a long
stabilization time is created, but over-
shooting is prevented.
Overshooting and hunting occur, but
the set value is quickly reached and the
temperature stabilizes.