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Commands
The following characters are used in 9400 series online data
streams.
Command Characters
Command
Character
{
,
;
p
}
Programming Conventions
All online commands from the host computer follow these rules.
All data after the TERMINATOR character ( } ) and
before the next LEADIN character ( { ) is ignored.
The hex values 7B, 7C and 7D are reserved as
command delimiters. All data of a value less than 20
hex and greater than 7E hex is ignored.
All data strings (batch data, compressed bit-map
images or format data) begin with a semi-colon (3BH)
and end with a TERMINATOR or inter-record separator
(IRS or
p
All space characters, except string definitions, are
ignored.
All strings must be less than 100 characters.
Hex
Description
Value
7B
Open brace. Command LEADIN character
2C
Comma. Inter-field separator (IFS)
3B
Semicolon. Beginning of string character
7C
Split vertical bar. Command inter-record
separator (IRS)
7D
Close brace. Command TERMINATOR
character
(7C hex)).
4. Message Structures
4-5
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