Mitsubishi Electric 700 Series, Instruction Manual

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245
Communication operation and setting
4
P
ARA
MET
E
RS
(7) Pr. 343 Communication error count
You can check the cumulative number of communication errors.
(8) Output signal LF "alarm output (communication error warnings)"
During a communication error, the alarm signal (LF signal) is output by open collector output. The LF signal
can be assigned to the output terminal using any of
Pr. 190 to Pr. 196 (output terminal function selection) .
Parameters Setting Range Minimum Setting Range Initial Value
343 (Read only) 1 0
CAUTION
The number of communication errors is temporarily stored into the RAM. As it is not stored into the EEPROM, performing
a power supply reset or inverter reset clears the value to 0.
CAUTION
Changing the terminal assignment using Pr. 190 to Pr. 196 (output terminal function selection) may affect the other functions. Set
parameters after confirming the function of each terminal.
Alarm data
Reply data
Master
Slave
0
Signal LF
Normal data
Alarm data Alarm data
1 2
OFF
ON
OFF OFF
ON
Not increased
Turns OFF when normal data is received
Alarm data :
Normal data
Reply data
Communication error count is increased in
synchronization with leading edge of LF signal
Data resulting in
communication error.
Communication
Error count
(Pr.343)