To prevent sudden changes in the manipulated variable when switching between
manual and auto operation, operation is resumed using the value that was active imĆ
mediately before operation was switched, and the value is brought gradually closer
to the value immediately after operation was switched.
Balance-less,
Bump-less Opera-
tion
3.8 Adjusting Control Operation
E5CK
3–23
Ă• The manipulated variable is controlled manually.
Ă• To set manual operation and manually set the manipulated variable,
press the
and keys simultaneously for 1 second minimum. The
controller enters the manual mode. To quit the manual mode, press the
and keys simultaneously again for 1 second minimum. The
controller enters the level 0 mode without entering the menu display.
Ă• Though the control shifts to manual operation if the controller is set to
the manual mode during program operation, the program advances.
When program operation is started in the manual mode, program also
advances.
Ă• In the manual mode, the automatic return of display mode does not
work.
Ă• Auto/manual can be switched up to 100,000 times.
Ă• The process value is displayed on the No.1 display, and the manipulated
variable is displayed on the No.2 display.
Ă• To change the manipulated variable, press the or keys. After
two seconds, the manipulated variable is updated to the new setting.
Ă• When switching between manual and auto operation, the manipulated
variable is subject to balanceĆless, bumpĆless operation.
Ă• If the power is interrupted during manual operation, manual operation
is resumed at the manipulated variable that was active at power interĆ
ruption when the power is reset.
0
Manipulated variable (%)
Balance-less,
bump-less points
Manual
Auto
Manipulated vari-
able switched
OFF ON
Time
++
Power inter-
ruption
JManual operation