Mitsubishi Electric FR-D720S SC EC Instruction Manual page 391

Parameter
Communication error count (Pr. 343)
You can check the cumulative number of communication errors.
Tab. 6-86: 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.
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, Pr. 192 or Pr. 197 "Output terminal function selec-
tion".
Communication
Fig. 6-118: Output of the LF signal
NOTE The LF signal can be assigned to the output terminal using any of Pr. 190, Pr. 192 or Pr. 197.
Changing the terminal assignment using Pr. 190, Pr. 192 or Pr. 197 may affect the other
functions. Make setting after confirming the function of each terminal.
FR-D700 SC EC
Parameter Setting Range
343
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 settings
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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