Using Discrete Ir Codes; Ir Command Protocol; Nec Protocol Message Format - Runco Signature Cinema SC-30d Installation & Operation Manual

External Control
6.2
Using Discrete IR
Codes

IR Command Protocol

The Dimension Digital Controller accepts commands in the form of IR signals that conform
to the NEC protocol. Each Dimension Digital Controller remote control button has an NEC
control code associated with it.
You can use these codes to program a third-party, "universal" remote control unit to work
with the Dimension Digital 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.
The IR control codes have the following characteristics:
• Each code consists of the following:
• A leader pulse (a modulated pulse of 9 ms followed by a non-modulated pulse of
4.5 ms);
• 16 address bits. The default address is 82 09 (0x2011, binary
00100000 00010001). To change it, select Remote Control from the Service menu
and follow the steps given on page 87;
• 16 data bits: eight (8) bits for the command followed by the logical inverse of the
command; and
• An end pulse (a modulated pulse of 0.56 ms, similar to the modulated pulse in the
'0' and '1' bits).The end of the modulated pulse constitutes the end of the data
transmission.
• The carrier frequency is 38 kHz, with the modulated pulses having a 33% duty cycle.
• Commands are sent at a maximum rate of 9 Hz.
For example, here is the NEC control code for the ON button on the Dimension Digital
Controller remote control unit (assuming the default address is used):
Hex 20
00100000
Binary
Function Address Byte 1
Figure 6-1 shows the pulse train for this command.
Leader Pulse Address Byte 1
0 0 1
9 ms 4.5 ms
13.5 ms
Figure 6-1. NEC Protocol Message Format
11
00010001
Address Byte 2
Address Byte 2
0 0 0 0 0 0 0 0 1 0 0 0 1
27 ms
122 Runco SC-30d/SC-35d Installation/Operation Manual
01
00000001
Command
(Logical Inverse)
Command Byte Command Byte (logical inverse)
0 0 0 0 0 0 0 1 1 1 1 1
27 ms
FE
11111110
Command
1 1 1 0