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Operating instructions GLP
5 -- 7
6.562.98.5.01.18
5.4 Scanner
.
The scanner operation in conjunction with a labeler is subject to
a SCANNER licence.
Depending on the configuration, the scanner may be connected to the labeler via
the EDP1 or the EDP3 interface.
EDP1
Labeler
Scanner, e.g.
EDP3
DLC 7070--M1
> The scanner must be configured so that the highest degree of readabi-
lity is ensured (multiple reading).
> The printout of the bar codes to be read must be of a high quality.
5.4.1 Interface parameters
The following parameters are to be preset on the scanner, e. g. the DLC7070--M1:
Type DLC 7070--M1
Baud rate: 9600 bits/second
Data bits 8
Stop bits: 1
Handshaking Hardware (RTS/CTS)
Header on character header (STX)
Terminator on character terminator (ETX)
5.4.2 Software protocol
The scanner may at any time transmit a read out result to the labeler. Each string
transmitted to the labeler via the EDP interface must start with a defined start cha-
racter and be terminated with a defined end character.
Start character: STX (0x02 ASCII)
End character: ETX (0x02 ASCII)
The labeler is capable of processing a maximum of 128 characters (incl. STX,
ETX). If neither a start character nor an end character is transmitted, the labeler
will not react to the actual telegram.
NO_READ
The labeler evaluates a NO_READ telegram from the scanner. The scanner must
be configured in such a way as to ensure that, in the case of error, the CAN charac-
ter (0x18) (NO READ) follows the STX character in the telegram.
Parity error
The labeler reacts to a parity error in the same way as it reacts in the case of
NO_READ.
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