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

Summary

GENERAL SAFETY INSTRUCTIONS AND INFORMATION ON USE

Designated use

Specifies the inverter's intended design and use in industrial plants and machines.

Misuse

Residual risks

Details hazards that cannot be eliminated despite safety-compliant design, including electrical, thermal risks.

Operator's/operating staff's responsibilities

Organizational measures

Handling and installation

Electrical connections

Safe operation

Outlines safety measures during operation, including cover checks and avoiding unauthorized modifications.

Maintenance and service/troubleshooting

Describes procedures for maintenance, inspections, and repairs, emphasizing qualified personnel.

First commissioning

Assembly/disassembly of communication module

Assembly

Details the process for installing the CM-Modbus/TCP communication module into the frequency inverter.

Disassembly

Modbus/TCP interface

Communication modules

Describes the CM-Modbus/TCP and CM-Modbus/TCP-2P modules and their RJ45 ports.

Setup

Operating behavior in the case of a communication error

Protocol

Supported function codes

Lists Modbus function codes used for reading and writing 16-bit and 32-bit values.

PARAMETER ACCESS

Handling of datasets / cyclic writing of parameters

Handling of index parameters / cyclic writing

EXAMPLE MESSAGES MODBUS/TCP

16-bit access

Provides examples of Modbus/TCP telegrams for reading and writing 16-bit parameters.

32-bit access

Demonstrates Modbus/TCP telegram examples for reading and writing 32-bit parameters.

MOTION CONTROL INTERFACE (MCI) / MOTION CONTROL OVERRIDE (MCO)

Motion Control Override

Functions of Motion Control Interface (MCI)

Covers reference systems, modes of operation, and parameters for MCI.

CONTROL OF FREQUENCY INVERTER

Control via contacts/remote contacts

Details control methods using digital inputs and remote contacts, including status word bits.

Control via state machine

Explains control via the state machine using the control word and status word.

Configurations without Motion Control

Motion control configurations

Explains how motion control configurations use control and status word bits for various modes.

Parameter List

Parameters (Menu “Para”)

Lists all available parameters, their ranges, and related chapters.

APPENDIX

Error messages

Explains error codes, their groups, and meanings for motion control and Ethernet communication.