Kramer Electronics VP-31KSi - Manual (Page 37)

Kramer Protocol
33
Knet Device ID follow by '@' char.
Query sign = '?', will follow after some commands to define query request.
Message closing char =
Host messages - Carriage Return (ASCII 13), will be referred to by CR in this document.
Machine messages - Carriage Return (ASCII 13) + Line-Feed (ASCII 10), will be referred to by CRLF.
Spaces between parameters or command parts will be ignored.
Commands chain separator char:
When message string contains more than one command, commands will be separated by pipe ("|").
Commands entering:
If terminal software used to connect over serial \ ethernet \ USB port, that possible to directly enter all commands characters (CR will be
entered by Enter key, that key send also LF, but this char will be ignored by commands parser).
Sending commands from some controllers (like Crestron) require coding some characters in special form (like \X##). Anyway, there is a
way to enter all ASCII characters, so it is possible to send all commands also from controller.
(Similar way can use for URL \ Telnet support that maybe will be added in future).
Commands forms:
Some commands have short name syntax beside the full name to allow faster typing, response is always in long syntax.
Commands chaining:
It is possible to enter multiple commands in same string by '|' char (pipe).
In this case the message starting char and the message closing char will be entered just one time, in the string beginning and at the
end.
All the commands in string will not execute until the closing char will be entered.
Separate response will be sent for every command in the chain.
Input string max length:
64 characters.
Backward support:
Design note: transparent supporting for protocol 2000 will be implemented by switch protocol command from protocol 3000 to protocol
2000, in protocol 2000 there is already such a command to switch protocol to ASCII protocol (#56 : H38 H80 H83 H81).
Table 17: Instruction Codes for Protocol 3000
Help commands
Command Syntax Response
Protocol Handshaking # CR ~OK CRLF
Device initiated messages
Command Syntax
Start message Kramer Electronics LTD. , Device Model
Version Software Version
Switcher actions
Audio-video channel has switched (AFV mode) AV IN>OUT
Video channel has switched (Breakaway mode) VID IN>OUT
Audio channel has switched (Breakaway mode) AUD IN>OUT