Specifications

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Protocol Parameters BUEP19E Section 8-3
8.3 Protocol Parameters BUEP19E
The operating terminal adapts to the default parameters of the interface. It is there-
fore
not necessary to modify the interface parameters in the PLC.
Baud rate: 9600 Baud
Parity: even
Data bits: 8
Stop bits: 1
Handshake: no handshake
8.3.1 Parameter Target Module
As a target module you can choose between CL500, CL400 or CL200.
8.3.2 Parameter Block Check
As a default, the protocol BUEP19E 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.
8.3.3 Parameter Coordination Flag
The protocol permits defining of a field coordination flag and a sequence coor-
dination flag.
8.4 Data Type Structure
a) Alphanumerical Text
Is stored in the memory byte for byte in ascending address order.
b) Counter
The count value is interpreted in binary format. The maximum value is 8191.
c) Timer
Timer functions consist of a time value and a time base. The terminal operates with
imaginary unsigned 4-byte variables, even though the data stored in the PLC com-
prise only 2 bytes.
When read-accessing the timer, the terminal converts the time value and time base
into a terminal-internal unsigned 4-byte number, which represents the time value in
reference to the time base of 0.01 second.
Example: A range of 10 (time base is 1.0 second) and a time value of 999, are
represented or edited, respectively, in the terminal by the value 99900. Scaling of
this value to other value ranges is possible by specifying a factor and divisor within
the variable definition.