Mitsubishi Electric FR-F800 Series Instruction Manual page 532

 Alarm (LF) signal output (communication error warning)
• During a communication error, the Alarm (LF) signal is output by open collector output. Assign the terminal to be used using
any of Pr.190 to Pr.196 (Output terminal function selection).
Master
Slave
Communication
error count
(Pr. 343)
Signal LF
NOTE
• The LF signal can be assigned to an output terminal by setting Pr.190 to Pr.196. Changing the terminal assignment may affect
other functions. Set parameters after confirming the function of each terminal.
Downloaded from ManualsNet.com
Alarm data Alarm data
Not increased
0
OFF
Communication error count is increased in
synchronization with leading edge of LF signal
search engine
Normal data
Reply data
1
OFF
ON
Turns off when normal data is received
Alarm data
Normal data
2
ON
Data resulting in
Alarm data :
communication error.
5.12 (N) Communication operation parameters
1
2
Reply data
3
OFF
4
5
6
7
8
9
10
531
5. PARAMETERS