Runco D-73D Using Discrete IR Codes, Command Parameter min/max Value Stored? Description

External Control

Table 6-1. Serial Commands (continued)

Command

Parameter (min/max)

Value

Stored?

Description

The following serial commands are meant to emulate buttons on the remote control or DHD Con- troller front panel. Each button has its own serial command, so effectively it is as if you were using the IR remote only you’ll be doing so via serial commands. These commands provide active OSD responses just like the IR remote.

DOWN	NA	NA	Down-Arrow ( ) key
ENTER	NA	NA	ENTER key
EXIT	NA	NA	EXIT key
LEFT	NA	NA	Left-Arrow ( ) key
MENU	NA	NA	MENU
RIGHT	NA	NA	Right-Arrow ( ) key
UP	NA	NA	Up-Arrow ( ) key

6.2

Using Discrete IR Codes

The DHD Controller accepts commands in the form of IR signals that conform to the Phillips RC5 protocol. Each DHD Controller remote control button has an RC5 control code associated with it.

You can use these codes to program a third-party, “universal” remote control unit to work with the DHD Controller. These third-party products usually come with a computer software application for this purpose. For more information, consult the documentation provided with the remote control unit.

IR Command Protocol ➤ The IR control codes have the following characteristics:

•Each code consists of 14 bits:

•Two (2) start bits (always 1);

•A toggle bit. This bit is inverted every time a key is released and pressed again. This allows the DHD Controller to distinguish between a button that remains down and one that is pressed repeatedly.

•Five (5) address bits. The default address is 17 (binary 10001). To change it, select Remote Code from the Miscellaneous menu (in the Service menu) and follow the steps given on page 92.

•Six (6) data bits.

•The carrier frequency is 36 kHz, with the modulated pulses having a 25% duty cycle.

•Commands are sent at a maximum rate of 9 Hz.

108 D-73d Series Installation/Operation Manual