
T
ROUBLESHOOTING
㩷
㩷
8
-6
FC5A MicroSmart PID Module User’s Manual FC9Y
-B1283
㩷
Loop break alarm turns on even though the actuator operates normally.
㩷
Loop break alarm turns on
even though the actuator is
operating normally.
Is the loop break
alarm time too short? (*1)
Set the loop break alarm time to a
suitable value.
Is the loop break
alarm span too great? (*2)
Call IDEC for assistance.
END
YES
NO
Set the loop break alarm span to a
suitable value.
NO
YES
㩷
㩷
*1:
Loop break alarm time may be too short compared to the loop break alarm span.
*2:
Loop break alarm span may be too great compared to the loop break alarm time.
Note: Loop break alarm time and loop break alarm span
Set the loop break alarm span to a value around 1.25 times bigger than the operation span in normal
operation.
Example: Heater in which temperature rises 150°C in 30 minutes
When the loop break alarm time is 10 minutes, the operation span in normal operation is 50°C
(150°C/30 minutes × 10 minutes). Set the loop break alarm span to 65°C which is about 1.25
times bigger than 50°C.
Program control is terminated earlier than the configured time.
Program control is terminated
earlier than the configured time.
Is PV start (*1) or
PVR start (*1) selected as
“
program
control mode start type
“
?
Select SP start (*1) as
“
program
control mode start type
“
.
Is each step time suitable?
Call IDEC for assistance.
END
YES
NO
Set each step time to a suitable
value.
YES
NO
㩷
㩷
*1:
For program control mode start type, see page 6-41.
㩷
㩷
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]