Mitsubishi Electric FR-D700 Instruction Manual page 210

Communication operation and setting
NOTE
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.
(8) 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 Pr. 190 or Pr. 192 (output terminal function selection).
Master
Alarm data
Slave
Communication
Error count
(Pr. 343)
OFF
LF signal
NOTE
The LF signal can be assigned to the output terminal using Pr. 190 or Pr. 192. Changing the terminal assignment may
affect the other functions. Make setting after confirming the function of each terminal.
206
Alarm data Normal data
Not increased
0
ON
Communication error count is increased
in synchronization with leading edge
of LF signal
Alarm data
Reply data
1
OFF
Turns off when normal data is received
Alarm data: Data resulting in communication error.
Normal data
Reply data
2
OFF
ON