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Description of parameters
3
PARAMETERS
3.4.25 Operation at a communication error (Pr. 500 to Pr. 502)
Parameters which can be set when the plug-in option (FR-A7NC) is mounted.
(1) Waiting time for the communication line error output after a communication error (Pr. 500)
Waiting time for the communication error output after a communication line error occurrence can be set.
When a communication line error occurs and lasts longer than the time set in Pr. 500, it is recognized as a communication
error.
If the communication returns to normal within the time, it is not recognized as a communication error, and the operation
continues.
(2) Displaying and clearing the communication error count (Pr. 501)
The cumulative count of communication error occurrences can be displayed. Write "0" to clear this cumulative count.
When a communication line error occurs, the setting of Pr. 501Communication error occurrence count display increases by one.
Operation at a communication error in the CC-Link communication can be selected.
Parameter
Number
Name Initial value
Setting
range
Description
500
Communication error
execution waiting time
0s 0 to 999.8s
Set the waiting time for the communication error output
after a communication line error occurrence.
501
Communication error
occurrence count display
00
Displays the cumulative count of communication error
occurrences.
Write "0" to clear this cumulative count.
502
Stop mode selection at
communication error
00, 3
Set the converter’s operation at a communication line
error or an option unit fault.
NOTE
Communication error count is temporarily stored in the RAM memory. The error count is stored in EEPROM only
once per hour. If power reset or converter reset is performed, Pr. 501 setting will be the one that is last stored to
EEPROM depending on the reset timing.
Normal
Error
Pr. 500
setting time
Normal
Error
Communication line status
Alarm signal(LF)
(Pr. 502 = 3)
Recognition
ON
Pr. 500
setting time
Communication error
(E.OP3)
Normal
Error
Count timing depending on
communication line status
Incremented by 1
Normal
Error
Incremented by 1
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