Function Code 100, Read 32-Bit Parameter - BONFIGLIOLI Vectron ACTIVE Manual

6.4.3 Function Code 100, Read 32-bit Parameter

Request:
Function Code
Start Address (Data Set / Para-No)
Response:
Function Code
Register Value (Parameter Value)
Exception Response:
Error Code
Exception code
Start Address
This field is used to store the parameter number and data set number. The parame-
ter 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
Bits 15
Register Value
This field is used to store the 32-bit parameter value.
Note:
Example:
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.
Exception Code
The following exception codes can occur:
2
3
4
Exception Codes are described in detail in Chapter 6.6
05/08
05/08
Data set
14 13 12 11
Parameter Values
with decimal places are transferred without the deci-
mal point. Depending on the number of decimal places, the values are
multiplied by 10, 100 or 1000.
ILLEGAL DATA ADDRESS
ILLEGAL DATA VALUE
SLAVE DEVICE FAILURE
Modbus Instruction manual
Modbus Instruction manual
1 Byte
2 Bytes
1 Byte
4 Bytes
1 Byte
1 Byte
Start address
Parameter number
10 9 8 7 6
• Parameter unknown
• No. of bytes in the data field too small or too large
• Error on reading the parameter
0x64
0x0000 – 0x963F
0x64
0 – 0x FFFF FFFF
0xE4
2, 3 or 4
5 4 3 2 1 0
23
23