Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 436 / 608

Communication operation and setting Parameter
6 - 282
Communication error count (Pr. 343)
You can check the cumulative number of communication errors.
Output terminal LF "alarm output (communication error warnings)"
During a communication error, the alarm signal (LF signal) is output by open collector output. Assign
the used terminal using any of Pr. 190 to Pr. 192 "Output terminal function selection".
Parameters Setting Range Minimum Setting Range Initial Value
343 (Read only) 1 0
Tab. 6-107: Number of communication errors
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.
I001229E
Fig. 6-134: Output of the LF signal
NOTE The LF signal can be assigned to the output terminal using any of Pr. 190 to Pr. 192. Changing the
terminal assignment may affect the other functions. Make setting after confirming the function of
each terminal.
Master
Slave
Communication
Error count
(Pr. 343)
Signal LF
Alarm data Alarm data Normal data
Reply data
Normal data Alarm data
Reply data
OFF OFF OFF ON ON
Communication error count is increased in
synchronization with leading edge of LF signal
Turns off when normal data is received
Alarm data: Data resulting in
communication error.