ViewSonic VS11857 manual CD3200 Viii

ƒThe following is an example of PC requesting the volume value from the LCD Monitor:

PC send Get-Volume-value packet to Monitor (In ASCII)

Name	Length	Command	Value1	Value2	Value3	CR
Byte Count	5	f	0	0	0	00D
Bytes order	1	2	3	4	5	6

LCD Monitor will send “-” (02Dh), “CR” to PC if command is not recognized.

Otherwise the LCD Monitor will respond with the volume value as outlined below:

LCD-Monitor response packet to Get-volume-value (in this example the volume value is 50):

Name	Length	Value1	Value2	Value3	Value4	CR
Byte Count	5	0	0	5	0	00D
Bytes order	1	2	3	4	5	6

ƒThe following is an example of PC requesting the On-hours value from the LCD Monitor

PC send “Get-On hours” command to Monitor (In ASCII)

Name	Length	Command	Value1	Value2	Value3	CR
Byte Count	5	m	0	0	0	00D
Bytes order	1	2	3	4	5	6

LCD Monitor will send “-” (02Dh), “CR” bytes to PC if the command is not valid Otherwise the LCD Monitor will respond with the On-Hours value as outlined below:

LCD-Monitor response packet to Get-On-hours value is 12,500 hours):

Name	Length	Value1	Value2	Value3	Value4	Value5	CR
Byte Count	6	1	2	5	0	0	00D
Bytes order	1	2	3	4	5	6	7

Note that this response contain 6-bytes

A special command “Get-ACK” is used to test the communication link between PC and the LCD Monitor. The LCD Monitor shall response to “Get-ACK” command with a “+” or “-“.

Get-ACK from PC to LCD (ASCII)

Name	Length	Command	Value1	Value2	Value3	CR
Byte Count	5	z	0	0	0	00D
Bytes order	1	2	3	4	5	6

LCD Monitor will send “+” (02Bh); “CR” bytes to NMP-530 after receiving the command indicating that the communication link is OK

ViewSonic CD3200 viii