Omron E5AN-H User Manual page 213

Adjustment Level
l.adj
Adjustment Level Display
Function
at
AT Execute/Cancel
Function
Operation
See
See
192
This parameter is displayed after moving to the adjustment level.
When a logic operation is set, a period "." will be displayed on the No. 2. dis-
play.
• This parameter indicates that the adjustment level has been entered.
(The Adjustment Level parameter will not be displayed again even if the
M Key is pressed in the adjustment level to scroll through the parame-
ters.)
This parameter executes auto-tuning (AT).
• The MV is forcibly increased and decreased around the set point to find
the characteristics of the control object. From the results, the PID con-
stants are automatically set in the Proportional Band (P), Integral Time (I),
and Derivative Time (D) parameters.
• Both 100% AT and 40% AT are supported for AT.
• Only 100% AT can be executed for heating/cooling control and position-
proportional floating control.
• This parameter will not be displayed when either 100% or 40% AT exe-
cute/cancel is set to be executed using an event input.
Setting rage
OFF: AT Cancel
AT-2: 100%AT Execute
AT-1: 40%AT Execute
• This parameter is normally off. Press the U Key and select at-2 or at-
1 to execute AT. AT cannot be executed when control is stopped or during
ON/OFF control.
• When AT execution ends, the parameter setting automatically returns to
off.
■ Related Parameters
PID * proportional band, PID * Integral time, PID * Derivative time (PID setting
level): Page 217
PID ON/OFF (initial setting level): Page 228
The ramp must be in operation, and
2-PID control must be used. Event
Input Assignments 1 to 4 parameters
must be other than 100% or 40% AT
Execute/Cancel.
Default
OFF
Section 5-4