Manual BG41/BG42/BG43 Introduction
Rev. 99/49 1-3
1.2 General
The building blocks are differentiated by the number of existing interfaces, which can be adapted by
means of VIPA interface modules to different physical modes of transmission and can be used for
particular functions. They can be linked with any peripheral device, which uses the corresponding
transmission technology.
Every VIPA interface building block (BG41, BG42, BG43) is additionally equipped with a battery-
backed real-time clock and a diagnostic interface, which can be connected to a diagnostic adapter
(UPI-FOX).
1.3 Area of employment
The VIPA interface building block is used in PLC systems as an interface for the input and output of
data. It is equipped with transmitting and receiving buffers (each with 256 bytes), which are run by
the Z80 processor situated on the module. The module’s 25-pole SubD sockets are pin-compatible
with CP 525 when using serial communication modules.
The interface building block can, for example, be used to connect a keyboard, a terminal, a printer
or to communicate with a computer. Data for output or input can be filed in data handling blocks in
the programmable controller (PLC).
If no personal parameters are set, the following values for each interface are preset by serial
transmission:
•Noprotocol
• Rate of transmission 9600 baud
•Startbit 1
•Databit 8
• Parity check even parity
•Stopbit 2
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