Mitsubishi QJ71MB91, User Manual

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4
- 39 4.11 Diagnostics (FC: 08)
4.11.11 Return slave no response count (sub-function code: 15)
4
MODBUS(R) STANDARD FUNCTIONS
4.11.11 Return slave no response count (sub-function code: 15)
Reads to out the number of broadcast request messages received 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 4.54 Return slave no response count (Request message)
Figure 4.55 Return slave no response count (Normal response message)
Figure 4.56 Return slave no response count (Exception message)
(L)
Data
(L)
Function code
Function
code
(08
H
)
Sub-function code
Sub-function code
(000F
H
)
(0000
H
)
(H)
(H)
(L)
Data
(L)
Function code
Function
code
(08
H
)
Sub-function code
Sub-function code
(000F
H
)
Slave no-response count value
(0000
H
to FFFF
H
) *
1
The QJ71MB91 returns the slave no response count value of the
buffer memory to the master. (address: 0F07
H
/0F47
H
)
(H)
(H)
Data
Function code
Function
code
(88
H
)
Exception
code *
2