ViewSonic Set-Function description, Set-Function format, CD4620/CD4220 set command table

6.Protocol 2 : without ID

6.1Set function listing

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. The Set-Function packet format consists of 5 bytes. Note that the “Value” byte is always = 00.

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

Set-Function format:

Name

Byte Count

Bytes order

Length	Command	Value1	Value2	Value3	CR
1 Byte	1 Byte	1 Byte	1 Byte	1 Byte	1 Byte
1	2	3	4	5	6

All Set-Function from PC to Monitor (ASCII)

	Name	Length	Command	Value1	Value2	Value3	CR
	Byte Count	5	1 Byte	1 Byte	1 Byte	1 Byte	00D
	Bytes order	1	2	3	4	5	6
Example: Set Mute-ON command (ASCII)
	Name	Length	Command	Value1	Value2	Value3	CR
	Byte Count	5	6	0	0	0	00D
	Bytes order	1	2	3	4	5	6
Example: Set Mute-OFF command (ASCII)
	Name	Length	Command	Value1	Value2	Value3	CR
	Byte Count	5	6	0	0	1	00D
	Bytes order	1	2	3	4	5	6

Example: Set Tint to 50 command (ASCII)

Name

Byte Count

Bytes order

Length	Command	Value1	Value2	Value3	CR
5	‘	0	5	0	00D
1	2	3	4	5	6

LCD Monitor will send “+” (02Bh) and “CR” bytes to PC after receiving a valid command. LCD Monitor will send “-” (02Dh) and “CR” bytes to PC if the command is not valid.

Value Range: Three bytes ASCII value range

Command Code: Function command code in ASCII

CD4620/CD4220 set command table

Set Function	Length	Command	Command		Value Range	Comments
		Code (ASCII)	Code (Hex)	(Three ASCII bytes)
Power	5	!	21	000: STBY		Controlled power status: ON or
				001: ON		Standby
Input Select	5	“	22	000 : VGA
				001	: HDMI1
				002	: HDMI2
				003	: AV
				004	: YPbPr
				005	: S-Video
Contrast	5	#	23	000 ~ 100

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