Instruction manual

29
INVERTER SETTING
4
4.4 Operation at Communication Error Occurrence
4.4.1 Operation selection at communication error occurrence (Pr. 500 to Pr. 502)
You can select operations at communication error occurrences by setting Pr. 500 to Pr. 502 under network operation.
(1) The set time from when a communication line error occurrence until communication error output
You can set the waiting time from when a communication line error occurs until it is recognized as a
communication error.
If the communication line error still persists after the time set in Pr. 500 has elapsed, it is recognized as
a communication error.
When the error is restored to normal communication within the set time, it is not regarded as a
communication error and operation continues.
Parameter
Number
Name Setting Range
Minimum Setting
Increments
Initial Value
500
Communication error
execution waiting time
0 to 999.8s 0.1s 0
REMARKS
• For detection of communication error, set Pr. 391 Receive time interval at heart beat and set the send time interval from the
other node shorter than the heartbeat receive time interval.
When data is not received for more than the heartbeat receive time interval after the first reception, it is considered as a
communication line error, then "communication line alarm (E.OP1)" is displayed and the inverter stops.
(Refer to page 97 .)
Normal Error
Pr. 500
setting time
Pr. 391
setting time
Normal
Error
Communication
line status
Minor fault signal (LF)
(Pr. 502 = 3)
Recognition
ON
Pr. 391
setting time
Pr. 500
setting time
Communication error
(E.OP1)