Mitsubishi QJ71MB91, User Manual

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4
MODBUS(R) STANDARD FUNCTIONS
4.11 Diagnostics (FC: 08)
4.11.10 Return slave message count (sub-function code: 14)
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4.11.10 Return slave message count (sub-function code: 14)
Reads out the number of the slave message processing to the master. (Including receive
of request messages from broadcast.)
(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 4.51 Return slave message count (Request message)
Figure 4.52 Return slave message count (Normal response message)
Figure 4.53 Return slave message count (Exception message)
(L)
Data
(L)
Function code
Function
code
(08
H
)
Sub-function code
Sub-function code
(000E
H
)
(0000
H
)
(H) (H)
(L)
Data
(L)
Function code
Function
code
(08
H
)
Sub-function code
Sub-function code
(000E
H
)
Slave message count value
(0000
H
to FFFF
H
) *
1
The QJ71MB91 returns the slave message count value of the
buffer memory to the master. (address: 0F06
H
/0F46
H
)
(H)
(H)
Data
Function code
Function
code
(88
H
)
Exception
code *
2