Radwag PUE C41H Indicator Manuel d'utilisateur télécharger pdf (Page 152)

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32. APPENDIX

32.1. Communication with barcode scanners

1. For communication with barcode scanners RADWAG scales use

RS232 interfaces and simplex transmission (one direction) without

handshaking. Only two wires are required for assuring such a

transmission. Used scanners should be equipped in such interface

with disabled both hardware and software handshaking.

2. Both scales and scanners have the possibility of setting of

transmission parameters. Both devices are required to have the

same parameters set : baud rate, number of data bits, parity control,

stop bits. e.g. 9600,8,N,1 – baud rate 9600 bit/s , data 8-bits,

no parity control, 1 stop bit.

3. Barcode scanners can send additional information apart from the

expected barcode e.g. symbology (type of barcode). It is advisable

to disable such information because RADWAG devices and

software do not use it.

4. Some RADWAG systems can omit unnecessary information by

using parameters that mark the beginning and the length of the

code required to analyse.

5. A special protocol is required in order the code be received by

RADWAG equipment. It is required to program an appropriate

prefix and suffix. Prefix – one byte 01 hexadecimally, suffix one

byte 0D hexadecimally.

6. Most barcode scanners allow to enable/disable different

symbologies (barcode types).

7. Programming of scanners is usually performed by reading special

barcodes or by using an external software tool.

8. Scanners marketed together with RADWAG systems are always

configured according to the rules above.

Barcode with required prefix and

suffix in hexadecimal format

Barcode without

required –fixes in

ASCII format

Code type

01 30 30 32 31 30 31 32 36 0D 00210126 EAN-8

01 30 31 32 33 34 35 36 37 38 39 0D 0123456789 2 of 5

01 43 4F 44 45 20 33 39 20 54 45 53 54 0D CODE 39 TEST CODE 39

01 31 31 30 31 32 33 34 35 36 37 38 39 31 0D 1101234567891 EAN-13

01 43 6F 64 65 20 31 32 38 20 54 65 73 74 0D CODE 128 Test CODE 128

1 2 ... 147 148 149 150 151 152 153 154 155 156 157 ... 162 163

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Radwag PUE C41H Indicator Manuel d'utilisateur Page 152