User Manual

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Note:
The Response normally returns the same data as the Query.
Pre-Set Multiple Registers (Function 10 Hex)
Writes a consecutive word (two-byte) value to the specified address range.
Table 22. Pre-Set Multiple Registers (Modbus Function 10 Hex)
QUERY
Function 1
st
Word
Address
Number of
Words
Number of
Query Bytes
First value to write
10 HI LO HI LO HI LO
RESPONSE
Function 1st Word Address Number of Words
10 HI LO HI LO
Note:
The number of consecutive words that can be written is limited to 1.
Exception Responses
When a QUERY is sent that the instrument cannot interpret then an Exception RESPONSE is
returned. Possible exception responses are:
Table 23. Modbus Exception Responses
Exception
Code
Error Condition Interpretation
00
Unused None.
01
Illegal function Function number out of range.
02
Illegal Data Address
Write functions: Parameter number out of range or not
supported. (for write functions only).
Read Functions: Start parameter does not exist or end
parameter greater than 65536.
03
Illegal Data Value
Attempt to write invalid data / required action not
executed.
The format of an exception response is:
RESPONSE
Function Exception Code
Original Function code with its Most
Significant Bit (MSB) set.
as detailed above