WEST P4100 - Exception Responses; Pre-Set Multiple Registers (Function 10 Hex); Table 32. Pre-Set Multiple Registers (Modbus Function 10 Hex); Table 33. Modbus Exception Responses

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- DIN Controllers & Indicators - Product Manual
Page 98 Modbus Communications 59305, Issue 5 – March 2005
Pre-Set Multiple Registers (Function 10 Hex)
Writes a consecutive word (two-byte) value to the specified address range.
Table 32. 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 33. 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 ms bit set.
as detailed above
Note:
In the case of multiple exception codes for a single QUERY the Exception code returned is
the one corresponding to the first parameter in error.