Mitsubishi Melsec-L Series User Manual page 247

Error
Program example
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(1) In case of operation errors, the error flag (SM0) turns on and the error code is
stored in SD0.
Refer to the following according to the error code, and check and correct the error.
<Error code>
4FFF or less: MELSEC-L CPU Module User's Manual (Hardware Design,
H
Maintenance and Inspection)
7000 or later: Section 15.2
H
A program that reads the communication status of a target module.
When input/output signals of the C24 are from X/Y00 to X/Y1F
12 DEDICATED INSTRUCTIONS
The function reads the communication status of
a target module and stores it in a device.
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