RS485 – Controller BC8000
18
BC8000
RS485 – Controller BC8000
System Introduction
General
The BC8000 bus terminal controller allows assembly of a simple peer-to-
peer connection based on RS485 transmission. Connection for
programming the RS485 controller is established via the serial port on the
PC.
The controller can be programmed per programming standard IEC 1131-3
using TwinCAT BC or TwinCAT software.
There are two different operating modes for the BC8000. These are
selected via the address selection switches.
Address selection 99:
Master operation
RS485
BC
80
00
RS485 connection
External RS485 device
BC8000
An additional, external device is connected to the RS485 port of the
BC8000. It could be a display, barcode scanner, BK8000 or similar device.
Address selection 1-98:
Programming mode
RS485
BC
80
00
RS485 connection
PC
BC8000
or programming cable to the configuration port of the BC8000
RS485
RS232
The BC8000 is programmed in this mode. There are two possible
transmission paths:
1. The RS485 interface of the bus terminal controller.
The description of the RS485 interface and of the cable is described in
the chapter „The Medium: Cables and Plugs“.
2. The configuration interface of the bus terminal controller.
A special cable is required (included with TwinCAT BC).
Address selection
•
Address 0:
•
Address 1-98:
•
Address 99:
Reserved
Programming mode
The interface is available for the PLC program.
Master operating mode of the BC8000.
