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7.3.6
Function Code 101, Write 32-Bit-Parameter
Request:
Start Frame (RTU oder ASCII mode)
Address
Function Code
Start Address (Data Set/Para-No.)
Register Value (Parameter Value)
CRC
or LRC & Endframe
Response:
Start Frame (RTU oder ASCII mode)
Address
Function Code
Start Address (Data Set/Para-No.)
Register Value (Parameter Value)
CRC
or LRC & Endframe
Exception Response:
Start Frame (RTU oder ASCII mode)
Address
Error Code
Exception Response
CRC
or LRC & Endframe
Start Address
This field is used to store the parameter number and data set number. The parameter number ranges
from 0 – 1599 and is stored in the lower 12 bits; the data set number ranges from 0 – 9 and is stored
in the upper 4 bits.
e.g.: Parameter 372 (hex. 0x174), data set 2 (hex. 0x2) is stored as hex. 0x2174.
Data Set
Bits
15
14
For the above example:
Hex.
0
0
Bin.
2
Register Value
This field is used to store the 32-bit parameter value.
Note:
Parameter values with decimal places are transferred without the decimal point. Depending on the
number of decimal places, the values are multiplied by 10, 100 or 1000.
Example: Frequency Value
A frequency value of 100.25 Hz is to be transmitted. The numerical value actually transmitted is
10025, which corresponds to 0x2729 in HEX format.
02/2011
1 Byte
1 Byte
2 Bytes
4 Bytes
1 Byte
1 Byte
2 Bytes
4 Bytes
1 Byte
1 Byte
1 Byte
Start Address
13
12
11
10
9
1
0
0
0
0
1
1 – 0xF7 (=247)
0x65
0x0000 – 0x963F
0 – 0xFFFF FFFF
1 – 0xF7 (=247)
0x65
0x0000 – 0x963F
0 – 0xFFFF FFFF
1 – 0xF7 (=247)
0xE5
2, 3 or 4
Parameter number
8
7
6
5
4
1
0
1
1
1
7
Modbus Agile
3
2
1
0
0
1
0
0
4
33
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