235
OPTIONS
8
<When used with communication options >
Operation at a communication error occurrence (when a communication option is
connected)
You can select operation at a communication error occurrence by setting Pr. 500 to Pr. 502 during network
operation with a communication option. (not available with the FR-A5NM, FR-A5NP, and FR-A5NR
(communication options).)
(1) Operation selection at a communication error occurrence
1) Pr. 500 "communication error recognition waiting time
You can set the waiting time from when a communication line fault occurs until it is recognized as a
communication error.
The communication line fault which still persists after the time set in Pr. 500 has elapsed is recognized as a
communication error.
When the fault is restored to normal communication within the set time, it is not regarded as a
communication error and operation continues.
2) Pr. 501 "communication error occurrence count display"
The cumulative number of communication error occurrences can be indicated. Write 0 to erase this
cumulative count.
At the point of communication line fault occurrence, Pr. 501 "communication error occurrence count display"
is incremented by 1.
Parameter Number Setting Range Minimum Setting Increments Factory Setting
500 0 to 999.8s 0.1s 0
Parameter Number Setting Range Minimum Setting Increments Factory Setting
501 0 1 0
Note: The communication error occurrence count is stored into RAM temporarily. Since this data is stored
in E
2
PROM at one-hour intervals, performing power-on reset or inverter reset may cause the Pr. 501
data to be the value stored in E
2
PROM the last time depending on the reset timing.
Normal Abnormal
Communication line status
Communication error (OP3)
Recognition
Time set in Pr. 500
Count timing depending on
communication line status
Abnormal Abnormal Normal Normal
Incremented by 1 Incremented by 1
