ViewSonic EP4220, User Manual

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12
8.2. RS232 Command Table
The PC can control the LCD Monitor for specific actions. The Set-Function command allows you to control the
LCD monitor behavior in a remote sit through the RS232 port.
Communication Setting
- Baud Rate Select: 9600bps (fixed)
- Data bits:
8bits (fixed)
- Parity: None (fixed)
- Stop Bits: 1 (fixed)
The Set-Function packet format consists of 5 bytes.
Name Length Command Value1 Value2 Value3 CR
Byte Count 1 Byte 1 Byte 1 Byte 1 Byte 1 Byte 1 Byte
Bytes order 1 2 3 4 5 6
Set-Function description:
Length:
Total bytes of message = 5 ASCII (35H) excluding “CR”
Command:
Function command code: One byte ASCII code
Value[1~3]: Three bytes ASCII that defines the value
EP4220 set command table
Set Function Length Command Code
(Hex)
Value Range
(Three ASCII bytes)
Comments
Power 5 21 000 : STBY
001 : ON
Controlled power status:
ON or Standby
Input Select 5 22 004 : HDMI
006 : PC
008 : SD Card
Contrast 5 23 000 ~ 100
Brightness 5 24 000 ~ 100
Sharpness 5 25 000 ~ 100
Color 5 26 000 ~ 100
Volume 5 35 000 ~ 100
900:Volume down(-1)
901:Volume up(+1)
Mute 5 36 000: OFF
001: ON (mute)
Restore default 5 7E 000 Rests to factory
setting
EP4220 get command table
Get Function Length Command Code
(Hex)
Value Range
(Three ASCII bytes)
Comments
Get power status 5 6C 000 : STBY
001 : ON
Gets the status of the power:
000 = ePoster is in standby
001 = ePoster is ON