Beckhoff EL3702, Documentation

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Table of contents
EL37x2 4 Version: 3.5
Table of contents
1 Product overview analog input terminals with oversampling............................................................... 3
2 Foreword .................................................................................................................................................... 7
2.1 Notes on the documentation........................................................................................................... 7
2.2 Safety instructions .......................................................................................................................... 8
2.3 Documentation issue status............................................................................................................ 9
2.4 Version identification of EtherCAT devices..................................................................................... 9
3 Product overview..................................................................................................................................... 14
3.1 EL3702 - Introduction ................................................................................................................... 14
3.2 EL3702 - Technical data............................................................................................................... 15
3.3 EL3742 - Introduction ................................................................................................................... 16
3.4 EL3742 - Technical data............................................................................................................... 17
3.5 Basic function principles ............................................................................................................... 18
3.6 Sample programs ......................................................................................................................... 22
4 Basics communication ........................................................................................................................... 27
4.1 EtherCAT basics ........................................................................................................................... 27
4.2 EtherCAT cabling – wire-bound.................................................................................................... 27
4.3 General notes for setting the watchdog ........................................................................................ 28
4.4 EtherCAT State Machine .............................................................................................................. 30
4.5 CoE - Interface: notes................................................................................................................... 32
4.6 Distributed Clock........................................................................................................................... 33
5 Mounting and wiring ............................................................................................................................... 34
5.1 Instructions for ESD protection ..................................................................................................... 34
5.2 Installation on mounting rails ........................................................................................................ 34
5.3 Installation instructions for enhanced mechanical load capacity .................................................. 37
5.4 Connection system ....................................................................................................................... 38
5.5 Installation positions ..................................................................................................................... 41
5.6 Mounting of Passive Terminals..................................................................................................... 43
5.7 ATEX - Special conditions (extended temperature range) ........................................................... 44
5.8 ATEX Documentation ................................................................................................................... 45
5.9 UL notice....................................................................................................................................... 45
5.10 Configuration of 0/4..20 mA differential inputs.............................................................................. 47
5.11 EL37x2 - LEDs and pin assignment ............................................................................................. 51
5.11.1 EL37x2 - LEDs ................................................................................................................. 51
5.11.2 EL37x2 - Pin assignment ................................................................................................. 52
6 Commissioning........................................................................................................................................ 55
6.1 TwinCAT Quick Start .................................................................................................................... 55
6.1.1
TwinCAT 2 ....................................................................................................................... 57
6.1.2 TwinCAT 3 ....................................................................................................................... 67
6.2 TwinCAT Development Environment............................................................................................ 79
6.2.1
Installation of the TwinCAT real-time driver ..................................................................... 79
6.2.2 Notes regarding ESI device description ........................................................................... 85
6.2.3 TwinCAT ESI Updater...................................................................................................... 89
6.2.4 Distinction between Online and Offline ............................................................................ 89
6.2.5 OFFLINE configuration creation ...................................................................................... 90
6.2.6 ONLINE configuration creation ........................................................................................ 95