When control characteristics are already known, the PID parameters can be set diĆ
rectly to adjust control.
PID parameters are set in the proportional band" (P), integrated time" (I) and
derivative time" (D) parameters (level 1 mode).
For details on the setting ranges of these parameters, see chapter 5 Level 1 Mode
(page 5Ć17).
About PID Parame-
ters
The E5CKĆT differs from fixedĆvalue type controllers in that the SP changes autoĆ
matically. So, the timing of AT execution is the most important factor in control.
To obtain PID parameters for a specific SP, make a fixedĆvalue program as follows
and execute AT.
AT Execution Tim-
ing
10 minutes
100
Step 0
Set value
Step 0 100 0.10
SP Time
3.8 Adjusting Control Operation
E5CK
3–25
In this example, let's execute 40%AT.
(1) Select the menu display, and select : level 1 mode" using the
or keys. For details on selecting the menu display, see page
1Ć8.
(2) Press the key to enter the level 1 mode. The top parameter in the
setup mode ĂĂĂĂ
: AT execute/cancel" is displayed. In this example,
the parameter setting is ĂĂĂ
: AT cancel".
(3) Press the
key to specify [ ].
(4) The AT LED flashes, and AT execution starts. When the AT LED goes
out (end of AT execution), the parameter automatically returns to
ĂĂĂ
: AT cancel".
Setting Example
End of AT execution
1 second min.
AT execute
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