Kramer VP-439 [37/52] Command terms

VP-439 - The RS-232/Ethernet (UDP) Communication Protocol

SP = Space (ASCII 32 = 0x20)

8.1.3 Command Terms

Command

A sequence of ASCII letters ('A'-'Z', 'a'-'z' and '-').

Command and parameters must be separated by at least one space.

Parameters

A sequence of alphameric ASCII characters ('0'-'9','A'-'Z','a'-'z' and some special

characters for specific commands). Parameters are separated by commas.

Message string

Every command entered as part of a message string begins with a message

starting character and ends with a message closing character.

Note: A string can contain more than one command. Commands are separated by

a pipe ( '|' ) character.

Message starting character

'#' – For host command/query

'~' – For machine response

Device address (Optional, for K-NET)

K-NET Device ID followed by '@'

Query sign

'?' follows some commands to define a query request.

Message closing character

CR – For host messages; carriage return (ASCII 13)

CRLF – For machine messages; carriage return (ASCII 13) + line-feed (ASCII 10)

Command chain separator character

When a message string contains more than one command, a pipe ( '|' ) character

separates each command.

Spaces between parameters or command terms are ignored.