Omron E5CK User Manual page 39

CHAPTER 3 BASIC OPERATION
F 100%AT
Setting Example
AT execute
About PID Parame-
ters
3--14
In order to set the limit cycle of MV change width to 100%, select 100% AT
to shorten the AT execution time without worrying about fluctuations in
the process value.
Set point
Start of AT
execution
In this example, let's execute 40%AT.
(1) Select [ ] (level 1 mode) using the
selecting the menu display, see page 1-7.
(2) Press the key to enter the level 1 mode. The top parameter in the
setup mode [ ] "AT execute/cancel" is displayed. In this example,
the parameter setting is [
(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
[ ] ("AT cancel").
• In addition to AT, the E5CK is also provided with fuzzy self-tuning (ST)
that allows automatic calculation of the PID parameters suited to the
control target. However, note that the ST function operates only during
standard control by temperature input. For further information regard-
ing the ST, please see page 5-29 and A-10.
When control characteristics are already known, the PID parameters can be set
directly 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 5-11).
Limit cycle of MV
change width 100%
End of AT
] "AT cancel"
].
Time
or keys. For details on