EUROTHERM DRIVES Profibus DP Communications Interface Technical Manual HA463561U001 Issue 2 Copyright Eurotherm Drives Limited 2002 All rights strictly reserved No part of this document may be stored in a retrieval system or transmitted in any form or by any means to persons not employed by a Eurotherm group company without written permission from Eurotherm Drives Ltd Although every effort has been taken to ensure the accuracy of this document it may be necessary without notice to make amendments or correct omissions Eurotherm Drives cannot accept responsibility for damage injury or expenses resulting therefrom Compatible with Version 2 x Software Cont 3 Please read this information BEFORE installing the equipment Intended Users This manual is to be made available to all persons who are required to install configure or service equipment described herein or any other associated operation The information given is intended to highlight safety issues and to enable the user to obtain maximum benefit from the equipment Application Area The equipment described is intended for industrial motor speed control Personnel Installation operation and maintenance of the equipment should be carried out by qualified personnel A qualified person is someone who is technically competent and familiar with all safety information and established safety practices with the installation process operation and maintenance of this equipment and with all the hazards involved REFER TO YOUR MAIN PRODUCT MANUAL FOR SPECIFIC SAFETY INFORMATION ABOUT THE DEVICE YOU ARE CONTROLLING Safety Information Cont 4 Contents Contents Page Cont 5 PROFIBUS DP COMMUNICATIONS INTERFACE1 A System Overview 1 The PROFIBUS Protocol 1 Principles of Operation 2 I O Data Exchange 2 Product Features 3 Product Code and Contents 3 Installation 4 Wiring the System 4 Cable Specification 4 Earthing the Shield 5 User Connections to the Main Serial Port P1 5 Terminators 5 Terminal Block TB1 Connections 6 Repeaters 6 Fitting and Connecting to the Technology Box 6 Connecting to the Technology Card 584SV only 7 584SV Types 4 5 6 7 584SV Types 7 8 9 10 7 Wiring Diagram 8 Initial Check for Connection 8 Understanding the LED Indications 9 Network and Module LED Indications 9 Initial Set up for Profibus 10 Configuring the Drive 10 The PROFIBUS DP MMI View AC Drives 10 The Non specific ConfigEd Lite MMI View AC Drives 10 The PROFIBUS DP MMI View DC Drives 11 The Non specific ConfigEd Lite MMI View DC Drives 11 Selecting PROFIBUS DP 11 Configuring the PLC SCADA Supervisor 14 GSD Files 17 Configuration Data Cfg Data 17 Demand Data Protocol 20 Data Encoding 21 PROFIBUS Diagnostics 22 Troubleshooting 23 Internal Diagnostics 24 INT DIAG SELECT Parameter Values 24 Decimal Hexadecimal Table 25 Contents Contents Page Cont 6 1 PROFIBUS DP Communications Interface HA463561U001 PROFIBUS DP COMMUNICATIONS INTERFACE A System Overview Area Computer PC VMECNCHost DCS Temp Controller I O Field Device Motor Drives Trans mitter Field Device Factory Level Cell Level Field Level MMS TCP IP Backbone PROFIBUS FMS PROFIBUS DPPROFIBUS PA PLCPC Figure 1 PROFIBUS Application Areas The PROFIBUS Option supports the PROFIBUS DP variant of the PROFIBUS protocol which is designed especially for communication between automatic control systems and distributed I O at the device level It is most often used to allow a central Programmable Logic Controller or PC based control system to use external slave devices for I O or specialised functions The principal advantage is that these devices may be distributed around a machine thereby saving on the cost of point to point wiring The open nature of the network also permits equipment from different manufacturers to be mixed on the same bus Additionally the off loading of complex and specialised tasks such as PID temperature control lessens the processing load on the central PLC so that its other functions may be carried out more efficiently and require less CPU memory The PROFIBUS Protocol PROFIBUS is a vendor independent open fieldbus standard for a wide range of applications in manufacturing process and building automation Vendor independence and openness are guaranteed by the PROFIBUS standard EN50170 With PROFIBUS devices from different manufacturers can inter communicate Suitable interfaces exist for PLCs which include the Siemens Mitsubishi and Allen Bradley range PROFIBUS DP De central Periphery is described in DIN 19245 Part 3 and forms part of EN 50170 with P Net and WorldFIP However it is important to note that P Net and WorldFIP are wholly incompatible with PROFIBUS using different wiring and transmission technologies The PROFIBUS DP network uses a high speed version of the RS485 standard permitting baud rates of up to 12Mbaud A table of network speed against segment length is given in Chapter 3 A maximum of 32 PROFIBUS DP stations nodes may be contained within a single network segment Use of RS485 repeaters allows a total of up to 126 stations PROFIBUS DP is