ViewSonic IFP5550 User Manual page 102

10.3.3 Remote Control Pass-through Mode
When PC sets the Display to Remote Control Pass through mode, the Display shall
send a 7-byte packet (followed by "CR") in response to RCU button activation. In this
mode the RCU shall have no effect on the Display function. For example: "Volume+"
will not change the volume in the Display but only sends "Volume+" code to PC over
the RS232 port.
IR Pass Through-Function format
Reply: (Command Type="p")
Name Length
Byte 1 Byte
Count
Bytes 1
order
Example1: Remote Control pass-through when "VOL+" key is pressed for
Display (#5)
Send (Hex Format)
Name Length
Hex 0x36
Key
1
2
3
4
5
6
7
8
9
0
-
RECALL (LAST)
INFO (DISPLAY)
ASPECT (ZOOM, SIZE)
VOLUME UP (+)
VOLUME DOWN (-)
MUTE
CHANNEL/PAGE UP (+)/
BRIGHTNESS+
ID Command
Type
2 Byte 1 Byte
2~3 4
ID Command
Type
0x30 0x70
0x35
Code (HEX) Basic *3.1.1
01 V
02 V
03 V
04 V
05 V
06 V
07 V
08 V
09 V
0A V
0B
0C
0D
0E
0F
10 V
11 V
12 V
13
94
RCU Code1 RCU Code2
(MSB) (LSB)
1 Byte 1 Byte
5 6
RCU Code1 RCU Code2
(MSB) (LSB)
0x31 0x30
Optional *3.1.1
V
V
V
V
V
CR
1 Byte
7
CR
0x0D