Beckhoff BC9100 User Manual

Fieldbus system
BC9000 and BC910074 Version: 4.0.0
Here the offset always describes a word. Offset 0x0003 writes to the fourth word in the output process
image. The length indicates the number of words, and the Byte count is formed from the combination of all
the bytes that are to be written. Sample: 4 words - correspond to a byte count of 8
The data bytes contain the values for the analog outputs. In this example, two words are to be written. The
first word is to receive the value 0x3FFF, and the second word is to receive the value 0x7FFF.
Query
Byte name Sample
Function code 23
Read start address high 0
Read start address low 0
Read length high 0
Read length low 2
Write start address high 8
Write start address low 0
Write length high 0
Write length low 2
Byte count 4
Data 1 high 63
Data 1 low 255
Data 2 high 127
Data 2 low 255
Response
The coupler replies with the start address and the length of the bytes to be transferred in Byte count. The
data information follows. In this example the first word contains 0x0038 while the second word contains
0x3F0B.
Byte name Sample
Function code 23
Byte count 4
Data 1 high 0
Data 1 low 56
Data 2 high 63
Data 2 low 11
7.5.5 Examples for ModbusTCP
Examples for Modbus TCP are contained in this help text.
Simple example: Modbus TCP via VB6.0 https://infosys.beckhoff.com/content/1033/bc9000/Resources/
zip/4351427467.zip
Example: ModbusTCP via VB6.0, set and reset of the watchdog:https://infosys.beckhoff.com/content/1033/
bc9000/Resources/zip/4351429643.zip

Beckhoff BC9100 Specifications

General

Brand	Beckhoff
Model	BC9100
Category	Controller
Language	English

Summary

Foreword

Safety instructions

Crucial safety guidelines for installation, operation, and maintenance to prevent injury.

Parameterization and Commissioning

IP Address

Procedures for assigning and managing IP addresses for network communication.

Configuration

Configuration using the System Manager

Steps for configuring the system using the TwinCAT System Manager software.

Programming

TwinCAT PLC

Introduction to using TwinCAT PLC for programming the Bus Terminal Controller.

Program Transfer

Methods for downloading programs to the Bus Terminal Controller.

Fieldbus System

Ethernet

Detailed explanation of Ethernet technology and its protocols used in industrial automation.

ADS-Communication

Information on the Automation Device Specification (ADS) protocol for data exchange.

Modbus TCP

Error Handling and Diagnosis

Diagnostic LEDs

General Errors

ADS Diagnostics