Eastron SDM630-Modbus MID V2 - Page 45

The following query will send a diagnostic “return query data” query with the data elements set
to Hex(AA) and Hex(55) and will expect these to be returned in the response:
Field Name
Example (Hex)
Slave Address
01
Function
08
Sub-Function High
00
Sub-Function Low
00
Data Byte 1
AA
Data Byte 2
55
Error Check Low
5E
Error Check High
94
Note: Exactly one register of data (two bytes) must be sent with this function.
The following response indicates the correct reply to the query, i.e. the same bytes as the
query.
Field Name
Example (Hex)
Slave Address
01
Function
08
Sub-Function High
00
Sub-Function Low
00
Data Byte 1
AA
Data Byte 2
55
Error Check Low
5E
Error Check High
94
B+G e-tech GmbH ° DE 01979 Lauchhammer °
www.eastron-germany.de