Mitsubishi Electric MELSEC-L SERIES Basic User Manual page 261

(1) Initial error code (address: 69
The error codes generated when the initial process is executed are stored. Error codes are stored in binary when
Initial abnormal end signal (X1A) is on. The error codes are cleared when Initial normal completion signal (X19)
turns on, but can be also cleared by the following processes:
• Resetting or powering off the CPU module
• Writing 0 to the initial error code storage area using a program
(2) Open error code (address: 7C
The result of the open process for connection with the connected device is stored in binary.
• 0: Normal completion
• Values other than 0: Abnormal end (Open abnormal detection signal (X18): ON)
The error codes are cleared by the following operations:
• Reopening the connection that caused an open error
• Powering off and on or resetting the CPU module
(3) Fixed buffer sending error code (address: 7D
The error codes generated when an error has occurred in data sending to the destination during communications
using a fixed buffer in the connection with the connected device are stored. A sending error code is cleared when
the next data sending is completed normally.
(4) Connection end code (address: 7E
The codes returned in the responses from the destination during communications using a fixed buffer in the
connection with the connected device are stored in binary. Process the end codes in the responses according to
the destination.
)
H
to C1 , 5824 to 5869
H H H
to C2
H
to C3 , 5826
H H H
CHAPTER 16 TROUBLESHOOTING
)
H
, 5825 to 586A )
H H H
to 586B )
H
16
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