Function Code 3, Reading 16-Bit Or 32-Bit Parameters - BONFIGLIOLI Active cube Operation Manual

7.2.1

Function code 3, reading 16-bit or 32-bit parameters

This function code is used for reading 16-bit or 32-bit values from the frequency inverter.
Request Read 16-bit parameter:
Function code
Start address (dataset / para. no.)
Number of registers
Response Read 16-bit parameter:
Function code
Number of bytes
Register value (parameter value)
Request Read 32-bit parameter:
Function code
Start address (dataset / para. no.)
Number of registers
Response Read 32-bit parameter:
Function code
Number of bytes
Register value (parameter value)
Exception condition response:
Error code
Exception condition code
Start address
This field is used for saving the parameter number and dataset number. The parameter number is in
the range between 0 and 1599 and is saved in the 12 least significant bits. The dataset number is in
the range between 0 and 9 and is saved in the 4 most significant bits.
Example:
Parameter 372 (hex. 0x174), dataset 2 (hex. 0x2) is saved as hex. 0x2174.
Start address
Data set
Bits 15 14 13 12
For the above example:
Hex. 0 0 1 0
Bin. 2
Number of registers
This field is used for saving the number of parameters to be written. The value must always be 1,
since only one parameter can be written at a time.
Number of bytes
This field is set to
• 2 for 16-bit parameters
• 4 for 32-bit parameters
Register value
This field contains the 16-bit or 32-bit parameter value.
Parameter values with decimal places are transferred without decimal point. Depending
on the number of decimal places, the values are multiplied by 10, 100 or 1000.
28
1 byte
2 bytes
2 bytes
1 byte
1 byte
2 bytes
1 byte
2 bytes
2 bytes
1 byte
1 byte
4 bytes
1 byte
1 byte
Parameter number
11 10 9 8 7
0 0 0 1 0
1
ACU
Modbus/TCP
0x03
0x0000 – 0x963F
0x0001
0x03
0x02
0 – 0xFFFF
0x03
0x0000 – 0x963F
0x0002
0x03
0x04
0 – 0xFFFFFFFF
0x83
2, 3 or 4
6 5 4 3 2
1 1 1 0 1
7 4
1 0
0 0
10/13