WAGO 750-842 - User Manual

Modular I/O System
ETHERNET TCP/IP
750-342, 750-842
Manual
Technical description,
installation and
configuration
750-129/000-002
Version 2.0.0

Summary

2 The WAGO-I;O-SYSTEM 750

2.1 System Description

Details the WAGO-I/O-SYSTEM components: fieldbus coupler/controller, I/O modules, and end module.

2.2 Installation

Covers safety notes (ESD) and mechanical installation procedures on a carrier rail.

2.6 Technical Data

Lists mechanical, environmental, and EMC specifications for the WAGO-I/O-SYSTEM 750.

2.3 Electrical Installation

Explains wire connection using CAGE CLAMP and carrier rail grounding requirements.

2.4 Power supply

Details system and field-side power supply, 24V DC, 120V AC, 230V AC connections.

3 Fieldbus coupler; controller

3.1 Fieldbus coupler 750-342

Covers description, hardware view, device supply, fieldbus connection, and display elements of the 750-342 coupler.

3.1.5 Data exchange

Explains process data exchange via MODBUS/TCP, master/slave principle, and memory areas.

3.1.8 Fault behavior

Describes fault behavior for fieldbus failure and internal bus faults, including LED indications.

3.1.2 Hardware

Details the hardware view, device supply, fieldbus connection, display elements, and configuration interface.

3.1.5.2 Addressing

Details addressing the I/O modules and the address range for I/O module and fieldbus data.

3.1.9 Technical Data

3.1.3 Operating system

Explains the operating system's startup process, PLC cycle, and fault handling.

3.1.6 Starting up ETHERNET TCP;IP fieldbus nodes

Provides step-by-step procedures for starting up an ETHERNET TCP/IP fieldbus node and viewing HTML pages.

3.1.4 Process image

Describes the internal process image generation from I/O modules and data areas.

3.1.7 LED Display

Explains the LED display for coupler operating status and node status, including blink codes.

3.2 Fieldbus controller 750-842

3.2.1 Description

Combines ETHERNET TCP/IP functions with PLC functionality for the 750-842 controller.

3.2.5 Data exchange

Explains data exchange via MODBUS/TCP, PLC functionality, and memory areas.

3.2.2 Hardware

Details hardware view, device supply, fieldbus connection, display elements, and configuration interface.

3.2.5.2 Addressing

Details addressing I/O modules and the address range for I/O module and fieldbus data.

3.2.3 Operating system

Explains controller startup, PLC cycle, and operating modes (RUN/STOP).

3.2.6 Starting up ETHERNET TCP;IP fieldbus nodes

Provides procedures for starting up an ETHERNET TCP/IP fieldbus node and viewing HTML pages.

3.2.4 Process image

3.2.7 Programming the PFC with WAGO-I;O-PRO 32

Describes programming the PFC using WAGO-I/O-PRO 32, including ETHERNET library elements.

3.2 Fieldbus controller 750-842

3.2.8 LED Display

3.2.9 Fault behavior

Describes fault behavior for fieldbus failure and internal bus faults, including LED indications.

3.2.10 Technical Data

4 I;O modules

4.1 I;O modules-Review

4.5 Analog Outputs

Lists and reviews analog output modules for DC 0-10V and DC ±10V signals.

4.2 Digital Inputs

Lists and reviews various 2-channel and 4-channel digital input modules with their specifications.

4.6 Supply and End modules

4.3 Digital Outputs

Lists and reviews various digital output modules, including standard, relay, and solid-state types.

4.7 Terminal blocks for encoder and resolvers

4.4 Analog Inputs

Lists and reviews analog input modules for current, voltage, resistance, and thermocouple sensors.

4.8 Special terminal blocks

5 ETHERNET

5.1 Network architecture - Principles and Regulations

Explains ETHERNET principles, network architecture, transmission media, and topologies like star and tree.

5.2.2.1 ETHERNET

5.1.3 Coupler modules

5.2.2.2 IP-Protocol

5.1.4 Important terms

5.2.3 Application protocols

Covers MODBUS/TCP, Bootstrap Protocol (BootP), and HyperText Transfer Protocol (HTTP).

5.2 Network communication

Details channel access method (CSMA/CD) and communication protocols like IP, TCP, UDP.

6 Common MODBUS functions

6.1 Use of the MODBUS functions

Shows how MODBUS functions access process image data, distinguishing between register and coil functions.

6.2 Description of the MODBUS functions

Details MODBUS function codes (FC1-FC23), their requests, responses, and exception codes.

6 Common MODBUS functions

6.2.1 Function code FC1 (Read Coils)

6.2.4 Function code FC4 (Read input registers)

6.2.2 Function code FC2 (Read Discrete Inputs)

6.2.5 Function code FC5 (Write Coil)

6.2.3 Function code FC3 (Read multiple registers)

6.2.6 Function code FC6 (Write single register)

6 Common MODBUS functions

6.2.10 Function code FC11 (Get comm event counter)

6.2.11 Function code FC23 (Read;Write multiple registers)

6.2.12 Watchdog (Fieldbus failure)

Details the watchdog function for monitoring data transfer and handling fieldbus failures.

6 Common MODBUS functions

6.2.13 Diagnostic function

6.2.14 Configuration function

6.2.15 Firmware information

7 Application examples

7.1 Test of MODBUS protocol and fieldbus nodes

7.2 Visualization and control using SCADA software

Provides insight into using WAGO ETHERNET fieldbus coupler/controller with SCADA software for visualization.

8 Application in Explosive Environments

8.1 Foreword

8.3.2 Explosion protection group

8.5 Identification

8.2 Protective measures

8.3.3 Unit categories

8.6 Installation regulations

8.3 Classification meeting CENELEC and IEC

8.3.4 Temperature classes

WAGO 750-842 Specifications