BECKHOFF FC7501 User Manual
Documentation for
FC7501 und FC7502
SERCOS interface PCI Cards
Version: 1.0
Date: 02.12.2003
Foreword
Table of Contents
FC750x - PCI Cards for SERCOS
1. Foreword 4
Notes on the Manual 4
Safety Instructions 5
2. Product Overview 6
System Description 6
Hardware 7
Technical Data 8
3. Installation 9
Installation of the SERCOS card in the PC 9
Installation of the PCI driver 10
4. Configuration 11
The FC7500 tab 12
The Timing (Online/Offline) tab 14
The Online tab 15
The DPRAM (online) tab 15
5. Diagnosis 16
Diagnosis Inputs 16
6. Appendix 18
Support and Service 18
FC750x 3
Foreword
1. Foreword
Notes on the Manual
This description is only intended for the use of trained specialists in control and automation engineering who are
familiar with the applicable national standards. It is essential that the following notes and explanations are followed
when installing and commissioning these components.
Liability Conditions
The responsible staff must ensure that the application or use of the products described satisfy all the requirements
for safety, including all the relevant laws, regulations, guidelines and standards.
The documentation has been prepared with care. The products described are, however, constantly under development. For that reason the documentation is not in every case checked for consistency with performance data,
standards or other characteristics, and does not represent an assurance of characteristics in the sense of § 459,
Para. 2 of the German Civil Code. In the event that it contains technical or editorial errors, we retain the right to
make alterations at any time and without warning. No claims for the modification of products that have already
been supplied may be made on the basis of the data, diagrams and descriptions in this documentation.
© This manual is copyrighted. Any reproduction or third party use of this publication, whether in whole or in part,
without the written permission of Elektro BECKHOFF GmbH, is forbidden.
4 FC750x
Foreword
Safety Instructions
Safety Rules
The responsible staff must ensure that the application or use of the products described satisfy all the requirements
for safety, including all the relevant laws, regulations, guidelines and standards.
State at Delivery
All the components are supplied in particular hardware and software configurations appropriate for the application.
Modifications to hardware or software configurations other than those described in the documentation are not
permitted, and nullify the liability of Elektro BECKHOFF GmbH.
Personnel Qualification
This description is only intended for the use of trained specialists in control and automation engineering who are
familiar with the applicable national standards.
Description of safety symbols
The following safety symbols are used in this operating manual. They are intended to alert the reader to the associated safety instructions.
This symbol is intended to highlight risks for the life or health of personnel.
Danger
This symbol is intended to highlight risks for equipment, materials or the environment.
Warning
This symbol indicates information that contributes to better understanding.
Note
FC750x 5
Product Overview
2. Product Overview
System description
SERCOS is an open, fast bus system that has been the international standard (IEC 61491) for numerically controlled machines since 1995. Meeting high real-time requirements and interference-proof transfer in optical fiber
technology are important features of this bus system, which is widely used for drive technology applications. The
bus consists of a master and of a number of slaves. In a SERCOS system, the servo drives or the BK7500 SERCOS Bus Coupler represent the slaves.
The bus topology is a ring system, in which it is possible to operate up to 254 stations. The transmission speed is
2, 4, 8 or 16 Mbit/s. There are basically three types of telegram:
1. The master-sync telegram is received by all the slaves, and is used for synchronisation.
2. The master data telegram is also received by all the slaves, and contains the cyclic data and the service
data.
3. The slaves send their data in the form of a drive telegram.
PC Fieldbus Cards for SERCOS Interface
Beckhoff specially developed the fieldbus cards FC7501 (single-channel) and FC7502 (double-channel) with PCI
interface for the SERCOS interface. The driver integrated in the TwinCAT automation software ensures optimum
performance of these passive master cards, so that compared with an active solution there are no unnecessary
restrictions with regard to the number of devices or the data length. This also enables larger SERCOS projects
with more than 50 axes to be realised. To do so several PCs are precisely synchronised via SERCOS, whereby
one PC is defined as the master and all the others as slaves. For these applications it is interesting that the
FC7502 double-channel card can handle one master ring and one slave ring. The parameterisation of the master/slave mode is carried out simply through the software.
Bus Coupler for SERCOS interface
A further advantage results from the use of Beckhoff Bus Terminals with the BK7500 SERCOS Bus Coupler,
which enables the high data rate, short cycle time and high deterministic features of SERCOS also to be used for
classic I/O technology. Up to 64 the Bus Terminals for different analog or digital signals can be coupled to a single
Bus Coupler. Machine manufacturers with a high drive consumption and low I/O consumption no longer have to
install an additional I/O bus.
SERCOS control system
With TwinCAT as software PLC/NC, SERCOS cards, digital servo drives and Bus Terminals as I/O system, Beckhoff thus provides a complete PC-based control system for the SERCOS interface.
6 FC750x
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