Mitsubishi QJ71MB91, User Manual

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11
- 29 11.4 Error Codes
11.4.2 Exception code list
11
TROUBLESHOOTING
Table11.15 Exception code list (Continued)
(c) Error code issued when processing on the slave (QJ71MB91) was completed in
error
If processing on the slave (QJ71MB91) was completed in error, an exception code
is stored in the buffer memory. On the QJ71MB91, an error code is also stored in
the buffer memory to identify the detailed cause. (
Section 11.4.3)
The error code can be checked by the Error log (address: 0CFE
H
to 0DFF
H
) in the
buffer memory.( Section 11.4.1 (8))
Exception
code
Error name Description
Corrective action
Target device (Master side) QJ71MB91 (Slave side)
05
H
(5)
Acknowledge
As the slave is executing another
processing, a long duration of time
is required to complete the
requested processing.
Not issued by the slave function of the QJ71MB91.
06
H
(6)
Slave Device
Busy
As the slave is executing another
processing, the requested
processing cannot be executed.
07
H
(7)
NAK Error
The requested program function
cannot be executed on a slave.
08
H
(8)
Memory Parity
Error
A parity error was detected on a
slave during access to the
extension file register.
0A
H
(10)
Gateway Path
Unavailable
The gateway device
(MODBUS /TCP
MODBUS protocol) is not
available for use.
0B
H
(11)
Gateway Target
Device Failed To
Respond There is no response from the
slave devices connected ahead of
the gateway device.