6. Serial Communications
To interface the DHD Controller with a home theater automation/control system or a PC running terminal emulation software, connect it to your control system or PC as shown in Figure
Configure the
6.1
RS-232 Connection and Port Configuration
Serial commands to the DHD Controller take the following form:
•Commands are not
•For a single command that takes no parameters, type the command followed by a carriage return; for example, to set the aspect ratio to Letterbox, type
LETTERBOX <Enter>.
•For a single command that takes a parameter, type the command, a space or a comma and the desired value followed by a carriage return; for example, to set the brightness to
BRIGHTNESS,-10 <Enter>.
•You can also send a string of multiple commands on a single line, separated by commas. For example, COMPOSITE,BRIGHTNESS 100,ANAMORPHIC <Enter> switches to the Composite video input, sets the brightness to 100 and sets the aspect ratio to Anamorphic. Command strings can be up to 255 characters long.
Avoid combining the ON or POWER 1 commands with other commands Note on a single line. After sending ON or POWER 1, allow at least 15
seconds for the DHD Controller to power up. Once it does, it will accept and properly execute multiple serial commands.
Table
When you enter a valid command, the DHD Controller executes it and acknowledges it with a plus sign on the command line (+ >). When you enter an invalid command – one that is misspelled or followed by values outside the valid range for that command – the DHD Controller ignores it and returns a minus sign (- >).
Table 6-1. Serial Commands
Command | Parameter |
| Value | Description |
(min/max) |
| Stored? | ||
|
|
| ||
|
|
|
|
|
|
| Power On/Off Commands | ||
|
|
|
|
|
OFF | NA |
| NA | Turns projector off |
|
|
|
|
|
ON | NA |
| NA | Turns projector on |
|
|
|
|
|
POWER | 0/1 |
| NA | Turns projector on and off |
|
|
|
|
|
POWER? | NA |
| NA | Returns power status |
|
|
|
|
|
6.2
Serial Command Syntax
Runco | 83 |
