
- •TABLE OF CONTENTS
- •Important comments
- •Legal principles
- •Copyright
- •Personnel qualification
- •Intended use
- •Scope
- •Symbols
- •Font conventions
- •Number notation
- •Abbreviation
- •The WAGO-I/O-SYSTEM 750
- •System Description
- •General
- •Coupler/Controller (1)
- •I/O Modules (2)
- •End Module (3)
- •Installation
- •Safty notes
- •Mechanical Installation
- •Electrical Installation
- •Wire Connection
- •Change fuse
- •Power supply
- •System supply voltage
- •Supply Voltage Field Side
- •Manufacturing Number
- •Technical Data
- •Fieldbus coupler / controller
- •Fieldbus coupler 750-342
- •Description
- •Hardware
- •View
- •Device supply
- •Fieldbus connection
- •Display elements
- •Configuration interface
- •Operating system
- •Process image
- •Example of a process input image
- •Example of a process output image
- •Process data architecture for MODBUS/TCP
- •Data exchange
- •Memory areas
- •Addressing
- •Data exchange between MODBUS master and I/O modules
- •Starting up ETHERNET TCP/IP fieldbus nodes
- •Connecting PC and fieldbus node
- •Determining IP addresses
- •Allocating the IP address to the fieldbus node
- •Testing the function of the fieldbus node
- •Reading out the information as HTML pages
- •LED Display
- •Blink code
- •Fieldbus status
- •Node status
- •Fault behavior
- •Fieldbus failure
- •Internal bus fault
- •Technical Data
- •Fieldbus controller 750-842
- •Description
- •Hardware
- •View
- •Device supply
- •Fieldbus connection
- •Display elements
- •Configuration and programming interface
- •Operating mode switch
- •Operating system
- •Start-up
- •PLC cycle
- •Process image
- •Example of a process input image
- •Example of a process output image
- •Process data architecture for MODBUS/TCP
- •Data exchange
- •Memory areas
- •Addressing
- •Data exchange between master and I/O modules
- •Data exchange between PLC functionality (CPU) and I/O modules
- •Data exchange between master and PLC functionality (CPU)
- •Common access of MODBUS master and PLC functionality to outputs
- •Address review
- •Starting up ETHERNET TCP/IP fieldbus nodes
- •Connecting PC and fieldbus node
- •Determining IP addresses
- •Allocating the IP address to the fieldbus node
- •Testing the function of the fieldbus node
- •Viewing the HTML pages
- •Programming the PFC with WAGO-I/O-PRO 32
- •LED Display
- •Blink code
- •Fieldbus status
- •Node status
- •Supply voltage status
- •Fault behavior
- •Fieldbus failure
- •Internal bus fault
- •Technical Data
- •I/O modules
- •I/O modules-Review
- •Digital Inputs
- •Digital Outputs
- •Analog Inputs
- •Analog Outputs
- •Supply and End modules
- •Terminal blocks for encoder and resolvers
- •Special terminal blocks
- •ETHERNET
- •Network architecture – Principles and Regulations
- •Transmission media
- •Network topologies
- •Coupler modules
- •Important terms
- •Network communication
- •Channel access method
- •Communication protocols
- •ETHERNET
- •IP-Protocol
- •TCP protocol
- •ICMP
- •Application protocols
- •MODBUS/TCP
- •Bootstrap Protocol (BootP)
- •HyperText Transfer Protocol (HTTP)
- •Common MODBUS functions
- •Use of the MODBUS functions
- •Description of the MODBUS functions
- •Function code FC1 (Read Coils)
- •Function code FC2 (Read Discrete Inputs)
- •Function code FC3 (Read multiple registers)
- •Function code FC4 (Read input registers)
- •Function code FC5 (Write Coil)
- •Function code FC6 (Write single register)
- •Function code FC7 (Read Exception Status)
- •Function code FC16 (Write multiple registers)
- •Function code FC11 (Get comm event counter)
- •Function code FC23 (Read/Write multiple registers)
- •Watchdog (Fieldbus failure)
- •Diagnostic function
- •Configuration function
- •Firmware information
- •General Registers
- •Special PFC Register (only for controller 750-842)
- •Application examples
- •Test of MODBUS protocol and fieldbus nodes
- •Visualization and control using SCADA software
- •Application in Explosive Environments
- •Foreword
- •Protective measures
- •Classification meeting CENELEC and IEC
- •Divisions
- •Explosion protection group
- •Unit categories
- •Temperature classes
- •Types of ignition protection
- •Classifications meeting the NEC 500
- •Divisions
- •Explosion protection groups
- •Temperature classes
- •Identification
- •For Europe
- •For America
- •Installation regulations
- •Glossary
- •Literature list
- •Index

Important comments • 1
Legal principles
1 Important comments
To ensure fast installation and start-up of the units described in this manual, we strongly recommend that the following information and explanation is carefully read and adhered to.
1.1 Legal principles
1.1.1Copyright
This manual is copyrighted, together with all figures and illustrations contained therein. Any use of this manual which infringes the copyright provisions stipulated herein, is not permitted. Reproduction, translation and electronic and photo-technical archiving and amendments require the written consent of WAGO Kontakttechnik GmbH. Non-observance will entail the right of claims for damages.
1.1.2Personnel qualification
The use of the product detailed in this manual is exclusively geared to specialists having qualifications in PLC programming, electrical specialists or persons instructed by electrical specialists who are also familiar with the valid standards. WAGO Kontakttechnik GmbH declines all liability resulting from improper action and damage to WAGO products and third party products due to non-observance of the information contained in this manual.
1.1.3Intended use
For each individual application, the components supplied are to work with a dedicated hardware and software configuration. Modifications are only admitted within the framework of the possibilities documented in the manuals. All other changes to the hardware and/or software and the non-conforming use of the components entail the exclusion of liability on part of WAGO Kontakttechnik GmbH.
Please direct any requirements pertaining to a modified and/or new hardware or software configuration directly to WAGO Kontakttechnik GmbH.
Modular I/O System
ETHERNET TCP/IP