Mitsubishi Electric FR-F740 EC Instruction Manual page 457

Parameter
Pr. 343 Communication error count
You can check the cumulative number of communication errors.
Tab. 6-95:
NOTE
The number of communication errors is temporarily stored into the RAM. As it is not stored
into the E²PROM, performing a power supply reset or inverter reset clears the value to 0.
Output signal LF "alarm output (communication error warnings)"
During a communication error, the minor failure output (LF signal) is output by open collector
output. Assign the used terminal using any of Pr. 190 to Pr. 196 "Output terminal function se-
lection".
Communication
Fig. 6-169: Output of the LF signal
NOTE The LF signal can be assigned to the output terminal using any of Pr. 190 to Pr. 196. When
terminal assignment is changed, the other functions may be affected. Please make setting
after confirming the function of each terminal.
FR-F700 EC
Parameter Setting Range
343
Number of communication errors
Master
Alarm data Alarm data
Slave
Error count
(Pr. 343)
Signal LF
OFF
Communication error count is increased in
synchronization with leading edge of LF signal
Minimum Setting Range
(Read only)
Normal data
Reply data
ON
Turns off when normal data is received
Communication operation and setting
Initial Value
1
Alarm data Normal data
OFF ON
Alarm data: Data resulting in
communication error.
0
Reply data
OFF
I001229E
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