User`s manual

11 - 14 11 - 14
MELSEC
11 TROUBLESHOOTING
11.5.3 Flowchart to use when communication is disabled from time to time during user
program execution
START
YES
NO
YES
NO
YES
NO
NO
YES
END
Did the user program
return an error code?
Check the contents of the error using
the ERROR CODE, and check the user
program and station accessed.
Start the line monitor utility.
Is there any faulty station?
Replace the link cable or faulty station.
Change system configuration with only
the master station and host.
Is the link normal?
Replace the link cable or additional
station connected.
Add the adjacent stations one after the
other, and allow ample time for line
monitoring.
Is the monitor normal?