Mitsubishi Melsec-L Series User Manual page 273

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(c) PRO.
Indicates "Character error status".
Value Status
0001(ON) Error occurred.
0000(OFF) Normal
(d) P/S
Indicates "Status of parity error or sum check error".
Value Status
0001(ON) Error occurred.
0000(OFF) Normal
(e) C/N
Indicates "Access status with the CPU module".
Value Status
0001(ON) Error occurred.
0000(OFF) Normal
(f) NAK
Indicates "Abnormal completion status".
Value Status
0001(ON) Abnormal
completion
transmission
0000(OFF) Normal
completion
transmission
Description
Character error occurred.
Keeps its on-status even after the communication
returns to normal. Initialize the error information as
necessary.
For details, refer to Section 15.1.2.
Description
Parity error or sum check error occurred.
Keeps its on-status even after the communication
returns to normal. Initialize the error information as
necessary.
For details, refer to Section 15.1.2.
Description
• An external device issued a data read request to
the CPU module when online change is set to
prohibit in the switch settings by GX Works2.
For functions that cannot be used when online
change is set to prohibit, refer to the explanation
section in each command list of the Reference
Manual.
• An error has occurred during access between the
C24 and the CPU module.
Keeps its on-status even after the communication
returns to normal. Initialize the error information as
necessary.
For details, refer to Section 15.1.2.
Description
The C24 that could not receive data normally sent a
response message (NAK message) to the external
device to notice the abnormal completion.
The C24 that could receive data normally sent a
response message (ACK message) to the external
device to notice the normal completion.
15 TROUBLESHOOTING
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