BONFIGLIOLI Vectron Agile, Communications Manual

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Modbus Agile 02/2011 30
Protocol
Register Value
This field is used to store the 16-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:
A current value of 10.3A is to be transmitted. The numerical value actually transmitted is 103, which
corresponds to 0x67 in HEX format.
Exception Code
The following exception codes can occur:
2
ILLEGAL DATA ADDRESS − Parameter unknown
3 ILLEGAL DATA VALUE − No. of bytes in the data field too small or too large
4 SLAVE DEVICE FAILURE − Error on writing the parameter
Exception Codes are described in detail in Chapter 7.3.9 "Exception Codes".
Example of a Modbus ASCII telegram: see chapter 9.2.1.3
Example of a Modbus RTU telegram: see chapter 9.1.1.3
7.3.4 Function Code 16, Write 32-Bit-Parameter
Function code 16 can be used to to write the value of 16 Bit parameter in the inverter.
Request 32 Bit parameter write:
Start Frame (RTU oder ASCII mode)
Address 1 Byte 1 – 0xF7 (=247)
Function Code 1 Byte 0x10
Start Address (Data Set / Para-No.) 2 Bytes 0x0000 – 0x963F
No. of Registers 2 Bytes 0x0002
No. of Bytes 1 Byte 0x04
Register Value (Parameter Value) 2 Bytes 0 – 0xFFFF FFFF
CRC or LRC & Endframe
Response:
Start Frame (RTU oder ASCII mode)
Address 1 Byte 1 – 0xF7 (=247)
Function Code 1 Byte 0x10
Start Address (Data Set / Para-No.) 2 Bytes 0x0000 – 0x963F
No. of Registers 2 Bytes 0x0002
CRC or LRC & Endframe
Exception Response:
Start Frame (RTU oder ASCII mode)
Address 1 Byte 1 – 0xF7 (=247)
Error Code 1 Byte 0x90
Exception Code 1 Byte 2, 3 or 4
CRC or LRC & Endframe