BONFIGLIOLI Active Cube User 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
1 byte
0x03
Start address (dataset / para. no.)
2 bytes
0x0000 – 0x963F
Number of registers
2 bytes
0x0001
Response Read 16-bit parameter:
Function code
1 byte
0x03
Number of bytes
1 byte
0x02
Register value (parameter value)
2 bytes
0 – 0xFFFF
Request Read 32-bit parameter:
Function code
1 byte
0x03
Start address (dataset / para. no.)
2 bytes
0x0000 – 0x963F
Number of registers
2 bytes
0x0002
Response Read 32-bit parameter:
Function code
1 byte
0x03
Number of bytes
1 byte
0x04
Register value (parameter value)
4 bytes
0 – 0xFFFFFFFF
Exception condition response:
Error code
1 byte
0x83
Exception condition code
1 byte
2, 3 or 4
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
Parameter number
Bits
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
For the above example:
Hex.
0
0
1
0
0
0
0
1
0
1
1
1
0
1
0
0
Bin.
2
1
7
4
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
ACU Modbus/TCP 10/13

BONFIGLIOLI Active Cube Specifications

General

Brand	BONFIGLIOLI
Model	Active Cube
Category	Inverter
Language	English