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4
MODBUS STANDARD FUNCTIONS
4.10 Read Exception Status (FC: 07)
Reads error status.
(1) Request message format (Master
Figure 4.25 Read exception status (Request message)
(2) Response message format (Slave
(When completed normally)
Figure 4.26 Read exception status (Normal request message)
(When completed with an error)
Figure 4.27 Read exception status (Exception message)
Function code
Function code
(07
)
H
Function code
Data
Function
Error
code
information *1
(07
)
H
* 1 The data of the device specified in the Setting error status read device (address: 000A
in the buffer memory are stored in the error information area. (
Function code
Data
Function
Exception
code
code *
2
(87
)
H
* 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
Slave)
Master)
4.10 Read Exception Status (FC: 07)
to 000B
)
H
H
Section 7.3.4)
4
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