BECKHOFF FC7501 - Manual (Page 7)

Product Overview
FC750x 7
Hardware
The PCI cards for SERCOS interface FC7501 (single-channel) and FC7502 (double-channel) enable direct access
to the SERCON816 ASIC. The driver for these passive cards is incorporated into the TwinCAT software and al-
lows optimum access to the SERCOS interface. There are no unnecessary restrictions with regard to the number
of bus devices and I/O data per device.
The power of TwinCAT comes into its own with this new interface generation:
• Up to 254 device (servo drives or I/O modules, e.g. Bus Terminals with Bus Coupler BK7500)
• No restriction regarding assignment and length of the I/O data
• Exact synchronisation between TwinCAT and SERCOS
• Cycle times up to 62.5 µs are possible
• Synchronous process data communication
•
Master and slave mode can be parameterised by software
•
It is possible to have two parallel fieldbus channels on one card (2x SERCON816)
•
Synchronisation of both channels and other cards along with PC is possible
•
Can read in bus configuration
FC7501 and FC7502 in revision B FC7501 and FC7502 in revision C
1. PCI bus interface
2. Socket for connecting the sync cable
11. SERCOS output for connecting the outgoing optical fiber for optical fiber ring A
12. SERCOS input for connecting the return optical fiber for optical fiber ring A
13. Diagnostics LED for optical fiber ring A
21. SERCOS output for connecting the outgoing optical fiber for optical fiber ring B
22. SERCOS input for connecting the return optical fiber for optical fiber ring B
23. Diagnostics LED for optical fiber ring B
The hatched components for SERCOS channel B are not populated on the single-channel FC7501.
Compared with revision B, revision C has a larger board corresponding to the standard height of PCI cards.
TwinCAT I/O provides configuration tools and Windows NT/2000 drivers for programs in any desired high level
language (DLLs) and for Visual Basic applications (ActiveX). Applications with OPC interfaces can access the
cards via an OPC server.
Diagnostics LED
The diagnostics LED of a fieldbus channel is on, if the data transfer on the optical fiber is disturbed.