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4-23
Chapter 4. Functions
z
Special control output
The output in READY mode and the output when there is a PV alarm can be set for
each control loop.
Item (bank)
Display
Description
Initial value
READY MV (CONTROL bank)
MENU > Control
READY MV
-10.000 to +110.00%
0.0000
READY MV (Heat) (CONTROL bank) MENU > Control
READY MV (Heat)
-10.000 to +110.00%
0.0000
READY MV (Cool) (CONTROL bank) MENU > Control
READY MV (Cool)
-10.000 to +110.00%
0.0000
MV action if PV is bad
(CONTROL bank)
MENU > Control
MV action if PV is bad
0: Continue control operation
1: Output MV if PV is abnormal
0
MV if PV is bad
(CONTROL bank)
MENU > Control
MV if PV is bad
-10.000 to +110.00%
0.0000
If the PV is abnormal, a high limit alarm or the low limit alarm was generated for
the analog input used as the PV.
z
When switching to MANUAL mode
The control output when the mode is switched from AUTO to MANUAL can be set
for each control loop.
Item (bank)
Display
Description
Initial value
Type of change to MANUAL
(CONTROL bank)
MENU > Control
Type of change to MANUAL
0: Bumpless*
1
1: Preset*
2
0
Preset MANUAL value
(CONTROL bank)
MENU > Control
Preset MANUAL value
-10.000 to +110.00%
0.0000
*1. If 0 (bumpless) is set, the manipulated variable (MV) is retained when switching from AUTO to MANUAL mode.
*2. If 1 (preset) is set, the manipulated variable (MV) is changed to the "Preset MANUAL value" when the mode is switched
from AUTO to MANUAL.
Handling Precautions
•
When the mode is MANUAL at power ON, the "Preset MANUAL value" is used
as the initial MV. At this time, the "Type of change to MANUAL" setting is not
affected.
•
The above setting is invalid because MANUAL mode is disabled when ON/OFF
control is set.
•
If the "Control action" is changed from a setting other than the PID control
heating/cooling action to the PID control heating/cooling action, the "Preset
MANUAL value" is reset to 50.000 %.
•
If the "Control action" is changed from the PID control heating/cooling action
to a setting other than the PID control heating/cooling action, the "Preset
MANUAL value" is reset to 0.0000 %.