Atlona ATHD V42M - Manual (Page 7)

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7
RS 232
RS 232 SERIAL COMMANDS
1. RS-232 Serial Interface
RS-232 serial interface connect a PC or Control System
Pin RS-232 Definition
1 - Not used
2 Tx Transmitter
3 Rx Receiver
4 - Not used
5 GND Ground
6 - Not used
7 - Not used
8 - Not used
9 - Not used
2. RS-232
Atlona Technologies’ switcher can be controlled via the RS-232 serial control port to allow for interfacing to a
PC, The serial communication parameters are 9600 baud, 8 bit, No Parity and 1 stop bit - this is often referred
to as 9600 8N1.
When the unit recognizes a complete command it will perform the requested action - there is no delimiter
character required. The unit does not send out a message when a value is changed from the front panel or
by IR control. If the unit needs to be controlled via the front panel in addition to the RS232 control, you should
regularly poll the unit status to ensure the control system accurately reflects the current settings or similar third
party control system.
3. Commands
To Switch Inputs to Outputs
SBI0XO0Y- Where X is Output Number (1-2) and Y is Input Number (1-4)
Unit will respond with
SBUD0XOY- Where X is Output Number (1-2) and Y is Input Number (1-4)
Example : Send Input 4 to Output 2
SBI04O02-Send
SBUD04O2-Rcvd
1 5
6 9
Note: Turning the unit System Power Off over RS232 will distinguish the LED display leaving only the Power
Switch LED on. The Video and Audio outputs will also mute. While the unit is turned off by RS232 it will con-
tinue to accept and act upon switching commands. For example, if the unit is in the off mode (via RS232) and
you send a command to switch an input to an output, that route will complete and the video and audio will now
appear on that channel only. The front panel LED for that particular output will also show the input selected
(for that single output channel only). The remaining LED’s will remain off and video and audio outputs muted.
The unit will still return status and change messages in response to commands sent while in Power Off state. A
hard reset command (SBALLRST) will return the unit to normal operation and also unlock the front panel.