Specifications

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Technical Description Section 7-2
7.2 Technical Description
The interfacing of the operating terminal to the Bosch PLCs is effected by means of
the BUEP19 PU-protocol.
The PU protocol BUEP19 allows random read and write access to all PLC data.
Any byte-structured data types can also be accessed in bit-mode. The size of the
address area depends on the respective PLC.
A read access must occur, before individual bits or bytes of a flag word can be
accessed for a write operation. Subsequently, a write access is possible to the
entire data structure. When accessing individual bits or bytes, special care must be
taken to ensure that neither the terminal nor the PLC modify individual bits within
one byte (or individual bits within one word, respectively).
7.3 Protocol Parameters BUEP19
The operating terminal adapts to the default parameters of the PU interface. It is
therefore
not necessary to modify the interface parameters in the PLC.
To ensure a proper communication, the parameters must
not be modified.
Baud rate: 9600 Baud
Parity: even
Data bits: 8
Stop bits: 1
Handshake: no handshake
7.3.1 Parameter Target Module
To ensure an error-free data transmission, the terminal must be informed of which
module is to be connected to interface SER1.
ZE300 / ZE301
R300 / R301
R600
7.3.2 Parameter Block Check
As a default, the protocol BUEP19 implements the data block check method
CRC16.
The programming device uses a data block check method in accordance with
LRC8.
To avoid difficulties during the development phase during which the PU and the
terminal are alternately connected to the PLC, the terminal allows selection of the
block check method LRC8.
7.3.3 Parameter Coordination Flag
The protocol permits defining of a coordination flag.