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Determining PID Constants (AT, ST, Manual Setup) Section 3-8
3-8-4 Manual Setup
Individual PID constants can be manually set in the Proportional Band, Inte-
gral Time, and Derivative Time parameters in the adjustment level.
Operating Procedure 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.
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)
Operation Level
7. To return to the operation level, press the O Key for at least one second.
C
25
100
PV/SP
Adjustment Level
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.
l.adj
Adjustment
Level Display
C
p
8.0
Proportional
Band
C
p
10.0
i
233
Integral Time
i
250
d
40
Derivative Time
d
45
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