Omron E5AZ, Руководство пользователя

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46
Determining PID Constants (AT, ST, Manual Setup)
Section 3-8
3-8-3 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)
When P (Proportional Band) Is Adjusted
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.
at
off
AT execute/
cancel
C
p
8.0
Proportional
band
C
p
10.0
i
233
Integral time
i
250
d
40
Derivative time
d
45
Increased The curve rises gradually, and a long
stabilization time is created, but over-
shooting is prevented.
Decreased Overshooting and hunting occur, but
the set value is quickly reached and the
temperature stabilizes.
Set
value
Set
value