User Manual

48-7009-E 5-27
5.4.3 Mode/manual function
■ Mode (MD)/manual (MAN) function
Controls set in the control mode and manual controls can be switched over using the FUNC key, DI or
communication.
Changeable controls are RUN, READY, MANUAL and timer controls in the control mode (MD) of
SET 4. The control mode (MD) can be changed using the ▽ key or △ key.
The following explanation is for switching over the control mode (MD) to RUN.
In the manual control, a control amount (outputs for control) is randomly set and provided as output
regardless of the state of the subject of control.
The manual control is used when checking operations of operation ends such as heater and valve at the
initial operation of a system, or when the normal control is not possible due to a sensor failure.
With the PID control, abrupt change of operating amount (control outputs) is suppressed when the
auto-control and manual control are switched over one another. In addition, the
balance-less/bump-less function is mounted for suppressing chances of damage on peripheral devices
and negative effects to the control system due to such an abrupt change, resulting in control at ease.
0
100
Time
Operating amount (MV)
Operating amount (MV)
Auto-control
Manual control
Switchover
Change of
operating
amount
0
100
0
Time
Operating amount (MV)
Operating amount (MV)
Manual control
Auto-control
PV/SV screen at auto/manual
At RUN and READY At manual
℃
OUT1
℃
OUT1
Control setting value (SV) can be set. Operating amount can be set.
Note Use “SET 4/SV” for changing the control setting value (SV) in the manual control.