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7 DATA LINK PROCEDURE
MELSEC-QnA
The test results are displayd on the "LEDs" of master · local module.
Description
Check item
LED status
Module error
ROM error
RAM error
"SW" on
"M/S" on
"PRM" on
Self-loopback check
ROM check
RAM check
Repeats
SW
M/S
PRM
TIME
Continued from the previous page
The "RUN" LED turns off.
End
[When normal]
The LEDs are turned on in the following order:
"SW"
"M/S"
"PRM"
"TIME".
[When error]
The error description for each check item is shown below.
Replace the module if an error occurs.