KRAMER: SIMPLE CREATIVE TECHNOLOGY
CAT 5 Serial Control/Command
4
5 CAT 5 Serial Control/Command
5.1 RS-232 Protocol
The
Cobra MX-88
will echo each command character that is received via the
RS232 port. When using an external Control System to control the
MX-88
, a
delay of at least 10 milliseconds must be inserted between characters. This
will allow enough time for the switcher to echo the character back to the
Control System, and accept the next character.
Example: To connect Input 1 to Output 5, the command O5=1<CR> should
be transmitted: O (10ms Delay) 5 (10ms Delay) = (10ms Delay) 1 (10ms
Delay) <CR>”.
7-bit ASCII: 8 data bits, no parity, 1 stop bit, 9600 bps (9600 8N1).
All commands are Upper Case.
5.2 RS-232 Hardware interface
Label Signal
TX+
RS-232 Transmit (TD)
TX-
Not Used
RX+
RS-232 Receive (RD)
RX-
Not Used
GND GND
5.3 Commands
Command Description
ASCII Hex
“Output”
“O”
4F
“Preset”
“P”
50
“Recall (Preset)”
“R”
52
“Status Report”
“S”
53
“ID Report”
“?”
3F
“Clear Working Preset” “C”
43
“Address Configuration” “A”
41
5.4 Command Strings
A valid command string will begin with a Command character, and terminate
with a “Carriage Return” (<CR>). The format is as follows:
