Runco Q-750d Ultra Series Specifications download pdf (Page 118)

External Control

102 Q-750d Ultra Series Installation/Operation Manual

PRE

IMINAR

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

enables 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 80.

• 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.

For example, here is the RC5 control code for the ON button on the DHD Controller

remote control unit (assuming the default address is used):

➤

With Toggle Bit = 0

Hex 3 4 4 1

Binary 11 0 10001000001

With Toggle Bit = 1

Hex 3 C 4 1

Binary 11 1 10001000001

Function

Start

Bits

Toggle

Bit

Address Command

1 2 ... 113 114 115 116 117 118 119 120 121 122 123 ... 133 134

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Runco Q-750d Ultra Series Specifications Page 118