Intermec VT220/ANSI, Руководство программиста

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SECTION 9
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Extended Commands
9-30 VT220/ANSI Terminal Emulation Programmer’s Reference Guide
Scan Bar Code Parameters (#S)
The Scan Bar Code Parameters extended command allows
host systems to have the same capabilities as wireless sta-
tions using the Native data stream to set bar code parame-
ters and scan.
By inserting characters “#S” in the display buffer at Line 1,
Columns 2 and 3, the host computer tells the wireless sta-
tion to expect a Bar Code Scanner extended command. Ap-
propriate descriptive characteristics should follow the “#S”
characters. The wireless station returns a code that indi-
cates if the command was successful. Then it simulates the
[Enter] key to return a value to the host computer.
Due to possible system fragmentation of a data stream, the
“#” in Line 1, Column 2 should be the last character placed
on the screen. This will assure that all data is present be-
fore the extended command is parsed (removed).
Table 9-7 lists columns in which characters must appear.
Tables on the following pages list characters for each type of
bar code.
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NOTE: The PEN*KEY 6500 Computer supports only the laser bar code
scanner.
Table 9-7
Scan Bar Code Parameters
Line 1, Columns 2--3
Column Character
Description
2 # Extended command.
3 S Scan Bar Code Parameters command.