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MELSEC-Q
11 TROUBLESHOOTING
Corrective Action
Exception
Code
Error Name Description
Target device (Master side) QJ71MT91 (Slave side)
08H
Memory parity
error
In the slave, a parity error was
detected at access to the
extended file register.
0AH Gateway unusable
The gateway device
(MODBUS
R
/TCP
MODBUS
R
serial protocol) is
not available for use.
0BH
Gateway
response failure
No response is given from the
slave device connected ahead
of the gateway device.
Not issued by the slave function of the QJ71MT91.
(3) Error code for error completion of processing in slave (QJ71MT91)
If the processing in the slave (QJ71MT91) results in error completion, an
exception code is stored into the buffer memory. In the QJ71MT91, an error code
is also stored into the buffer memory to identify the cause in detail.
The error code can be confirmed in the error log area (address: CFE
H to DFFH)
of the buffer memory.
REMARK
• Refer to Section 11.3.1 (8) for details of the error log area.
• Refer to Section 11.3.3 for details of the error codes.
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