NCR RealScan 7802, Руководство пользователя

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NCR RealScan 7802 Price Verifier User Guide
497-0425530 Release E 06/03 79 of 94
Product Query
The product query string immediately follows the header. The header for a request
about product ABC would be:
0 1 2 3 4 5 6 7
Byte #
0 0 0 12 P R O D
The query string “ABC” and a terminating <NUL> immediately follow the header.
Mode settings can cause the client to send its unit ID and a <TAB> character before
the product data, and/or add terminating <CR> and/or <LF> characters at the end
of the query string.
Data
Data can be one of several types. The data–type token immediately follows the
packet–type token, and the data follows after that. The header for a data packet to
display the word “hi” would be:
0 1 2 3 4 5 6 7 8 9 10 11
Byte #
0 0 0 15 D A T A T E X T
The data string “hi” and a terminating <NUL> immediately follow the header.
Registration
Registration information consists of three sequential <NUL> terminated strings
following the header. The first string is the unit ID, the second is the product–type
identification, and the third is the IP address of the registering client. The header for a
registration packet for “Entry”, product type “RealScan 7802 200102161901”, and IP
address of “10.0.0.227” would be:
0 1 2 3 4 5 6 7
Byte #
0 0 0 79 R G S T
Each registration string and its terminating <NUL> immediately follows the header
or the previous registration string. When a client receives a registration packet, it
should respond by sending its own registration.