Mitsubishi MELSEC LJ71C24, Руководство пользователя

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15 TROUBLESHOOTING
(c) PRO.
Indicates "Character error status".
Value Status Description
0001(ON) Error occurred. 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.
0000(OFF) Normal -
(d) P/S
Indicates "Status of parity error or sum check error".
Value Status Description
0001(ON) Error occurred. 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.
0000(OFF) Normal -
(e) C/N
Indicates "Access status with the CPU module".
Value Status Description
0001(ON) Error occurred. • 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.
0000(OFF) Normal -
(f) NAK
Indicates "Abnormal completion status".
Value Status Description
0001(ON) Abnormal
completion
transmission
The C24 that could not receive data normally sent a
response message (NAK message) to the external
device to notice the abnormal completion.
0000(OFF) Normal
completion
transmission
The C24 that could receive data normally sent a
response message (ACK message) to the external
device to notice the normal completion.