Mitsubishi QJ71MB91, User Manual

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4
- 37 4.11 Diagnostics (FC: 08)
4.11.9 Return bus exception error count (sub-function code: 13)
4
MODBUS(R) STANDARD FUNCTIONS
4.11.9 Return bus exception error count (sub-function code: 13)
Reads out the frequency of exception errors to the master.
(1) Request message format (Master Slave)
(2) Response message format (Slave Master)
(When completed normally)
* 1 Refer to the following for the relevant counts, count clear methods and precautions.
Section 11.3
(When completed with an error)
* 2 Exception and error codes are stored in the buffer memory in the case of error completion.
Refer to the following for storage location, confirmation methods, and detailed contents.
Section 11.4
Figure 4.48 Return bus exception error count (Request message)
Figure 4.49 Return bus exception error count (Normal response message)
Figure 4.50 Return bus exception error count (Exception message)
(L)
Data
(L)
Function code
Function
code
(08
H
)
Sub-function code
Sub-function code
(000D
H
)
(0000
H
)
(H) (H)
(L)
Data
(L)
Function code
Function
code
(08
H
)
Sub-function code
Sub-function code
(000D
H
)
Exception error count value
(0000
H
to FFFF
H
) *
1
The QJ71MB91 returns the exception error count value of the
buffer memory to the master. (address: 0F0A
H
/0F4A
H
)
(H)
(H)
Data Function code
Function
code
(88
H
)
Exception
code *
2