Commands
The following characters are used in 9400 series online data
streams.
Command Characters
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 (7C hex)).
• All space characters, except string definitions, are
ignored.
• All strings must be less than 100 characters.
Command
Character
Hex
Value
Description
{ 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
Message Structures
4. Message Structures
4-5
