5-17
Chapter 5. SETTINGS BEFORE STARTING OPERATION
Operation type Set value of
operation
type
Direct action Reverse action
Loop diagnosis 2 21 The event is turned ON when any change in PV corresponding to increase/decrease in
MV (Manipulated variable) is not observed.
This event is used to detect any fault at the operation end.
z Setting items
• Main setting: MV (Manipulated variable)
• Sub-setting: Change in PV from the point that the MV exceeds the main setting.
• ON delay time: Diagnosis time
z Operation specifications
The event is turned ON when the MV exceeding the main setting is held (conditions 2)
and the PV does not reach the value that the sub-setting is added to (subtracted from)
the PV at the point that the MV exceeds the main setting within the diagnosis time (ON
delay time) (conditions 1).
z CAUTION
When setting the ON delay, it is necessary to put in "High function configuration".
The default setting of the ON delay before shipment is 0.0s.
as reference
Main setting
Time
Conditions 3
ON delay
set time
ON delay is started when conditions 1 and 2 are satisfied.
Area satisfying
conditions 1
Area satisfying
conditions 2
Time
Time
PV
MV
EV
ON
HYS
Main setting
Time
Conditions 3
ON delay
set time
ON delay is started when conditions 1 and 2 are satisfied.
Area satisfying
conditions 1
Area satisfying
conditions 2
Time
Time
PV
MV
EV
ON
HYS
(0 or more)
PV to be used
as reference