BECKHOFF BC3150 - Manual (Page 9)

Safety Instructions
Fieldbus Components 7
2. Product Overview
BCxx50 - Overview
Bus Terminal Controllers are Bus Couplers with integrated PLC functionality. The BCxx50 Bus Terminal Controllers
have a fieldbus interface, are intelligent slaves and can be used as remote intelligence within the system. They are
located in a cost-optimized and compact housing. In contrast to the BCxx00 range, the BCxx50 range supports up to
255 Bus Terminals via the K-Bus extension.
The Bus Terminal Controller is programmed using the TwinCAT programming system according to IEC 61131-3. The
BCxx50 configuration/programming interface is used for loading the PLC program. If the TwinCAT software PLC is in
use, the PLC program can also be loaded via the fieldbus.
The inputs and outputs of the connected Bus Terminals are assigned in the default setting of the mini-PLC. Each
individual Bus Terminal can be configured in such a way that it exchanges data directly through the fieldbus with the
higher-level automation device. Similarly, pre-processed data can be exchanged between the Bus Terminal
Controller and the higher-level controller via the fieldbus.
Fieldbus interface
The variants of the BCxx50 series Bus Terminal Controllers differ in terms of their fieldbus interfaces. Five different
versions cover the main fieldbus systems:
•
BC3150: PROFIBUS DP
•
BC5150: CANopen
•
BC5250: DeviceNet
•
BC8150: RS232 or RS485 (without fieldbus interface)
Programming
The BCxx50 devices are programmed according to the powerful IEC 61131-3 standard. Like for all other BECKHOFF
controllers, the TwinCAT automation software is the basis for parameterization and programming. Users therefore
have the familiar TwinCAT tools available, e.g. PLC programming interface, System Manager and TwinCAT Scope.
Data is exchanged optionally via the serial port (COM1) or via the fieldbus through
BECKHOFF PC FCxxxx fieldbus
cards.
Configuration
The configuration is also carried out using TwinCAT. The fieldbus interface can be configured and parameterized via
the System Manager. The System Manager can read all connected devices and Bus Terminals. After the
parameterization, the configuration is saved on the BCxx50 via the serial interface. The configuration thus created
can be accessed again later.