Remote Commands and Syntax
Commands 6
6-7
Table 6-1. Functional Elements of Commands
Element Function
PROGRAM MESSAGE
A sequence of zero or more PROGRAM MESSAGE
UNIT elements, each of which is separated by a
PROGRAM MESSAGE UNIT SEPARATOR element
PROGRAM MESSAGE UNIT
A command, programming data, or query received by
the device.
COMMAND MESSAGE UNIT
A command or programming data received by the
device.
QUERY MESSAGE UNIT A query sent from the controller to the device.
PROGRAM DATA Any of the six available program data types.
PROGRAM MESSAGE UNIT
SEPARATOR
Separates the PROGRAM MESSAGE UNIT elements
that comprise a PROGRAM MESSAGE.
PROGRAM HEADER SEPARATOR Separates the header from the PROGRAM DATA.
PROGRAM DATA SEPARATOR
Separates PROGRAM DATA ELEMENTS listed under
one header.
PROGRAM MESSAGE TERMINATOR Terminates a PROGRAM MESSAGE.
COMMAND PROGRAM HEADER
Specifies a function or operation. Used with any
associated PROGRAM DATA ELEMENTS.
QUERY PROGRAM HEADER
Similar to a COMMAND PROGRAM HEADER except
that is contains a query indicator (?) since a response
form the device is expected.
CHARACTER PROGRAM DATA
A data type suitable for sending short mnemonic data,
generally used where a numeric data type is not
suitable.
DECIMAL NUMERIC PROGRAM DATA
A data type suitable for sending decimal integers of
decimal fractions, with or without exponents.
NON-DECIMAL NUMERIC PROGRAM
DATA
A data type suitable for sending integer numeric
representations in base 16, 8, or 2.
SUFFIX PROGRAM DATA
An optional field that follows DECIAML NUMERIC
PROGRAM DATA, and is used to indicate associated
multipliers and units.
STRING PROGRAM DATA
A data type suitable for sending 7-bit ASCII character
strings where the content needs to be hidden (by
delimiters).
ARBITRARY BLOCK PROGRAM DATA
A data type suitable for sending blocks of arbitrary 8-bit
information. Block size is limited to 1024 bytes.
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