E5AK
5--11
AT Execute/Cancel
Conditions of Use
The controller must be in operation, con-
trol must be advanced PID control, and ST
must be set to OFF.
·
Selects the limit cycle of MV change width (40% or 100%) for execution. After AT
execution, the “PID” and the “LBA detection time” (LBA: Loop Break Alarm) param-
eters are set automatically.
·
During heating and cooling control or position-proportional control, only 100%AT
can be executed.
·
When this parameter is selected, the setting becomes [
].
·
To execute 40%AT, select [
], and to execute 100%AT, select [
]. During
execution of auto-tuning, the AT LED flashes. However, note that during heating and
cooling control or position-proportional control, [
] is not displayed.
·
When AT execution ends, the parameter setting automatically returns to [
].
F
Related article
3.7 Adjusting Control Operation (page 3-16)
F
Related parameters
“Run/Stop” (level 0 mode)
“Proportional band” “Integral time” “Derivative time” (level 1 mode)
“LBA detection time” (level 2 mode)
Set point 0
Set point 1
Set point 2
Set point 3
Conditions of Use
The controller must be in the local SP
mode with the multi-SP function enabled.
·
Switches set points 0 to 3 by event input for use as the set point (local SP).
·
Of set points 0 to 3, the number of valid set points is designated by the “multi-SP func-
tion” parameter.
·
The following table shows the relationship between event input and the selected
parameter.
Multi-SP Function
1
2
Event Input
1
1
2
Set Point 0
OFF
OFF
OFF
Set Point 1
ON
ON
OFF
Set Point 2
-
OFF
ON
Set Point 3
-
ON
ON
·
When the set point has been changed, the setting of whichever is selected in event
input, “set point 0” to “set point 3”, is linked and changed.
·
The decimal point position is dependent on the selected sensor during temperature
input and on the results of scaling during analog input.
Level 1 Mode
Function
Example
of use
See
Function