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 5-13).
About PID Parame-
ters
3.7 Adjusting Control Operation
E5AK
3--17
In this example, let’s execute 40%AT.
(1) Select [
] (level 1 mode) using the
or
keys. For details on
selecting the menu display, see page 1-8.
(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 [
] “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
[
] (“AT cancel”).
In addition to AT, the E5AK 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 op-
erates only during standard control by temperature input. For fur-
ther information regarding the ST, please see page 5-34 and A-14.
Setting Example
AT execute
1 second min.