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4.11 Diagnostics (FC: 08)
4.11.3 Return diagnostic register (sub-function code: 02)
4
MODBUS(R) STANDARD FUNCTIONS
(When completed with an error)
* 1 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 4.34 Return diagnostic register (Exception message)
Data
Function code
Function
code
(88
H)
Exception
code*
1
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