Mitsubishi QJ71MB91 User Manual

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4.11 Diagnostics (FC: 08)
4.11.7 Return bus message count (sub-function code: 11)
4
MODBUS(R) STANDARD FUNCTIONS
4.11.7 Return bus message count (sub-function code: 11)
Reads out the number of messages detected on the line 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 4.42 Return bus message count (Request message)
Figure 4.43 Return bus message count (Normal response message)
Figure 4.44 Return bus message count (Exception message)
(L)
Function code
Function
code
(08
H)
Data
(L)
Sub-function code
Sub-function code
(000B
H)
(0000
H)
(H) (H)
(L)
Data
(L)
Function code
Function
code
(08
H)
Sub-function code
Sub-function code
(000B
H)
Bus message count value
(0000
H to FFFFH) *
1
The QJ71MB91 returns the bus message count value of the
buffer memory to the master. (address: 0F00
H/0F40H)
(H)
(H)
Data
Function code
Function
code
(88
H)
Exception
code *
2

Mitsubishi QJ71MB91 Specifications

General

Brand	Mitsubishi
Model	QJ71MB91
Category	Controller
Language	English