Viewsonic SC-T35 [48/64] Protocol

9.2.2 Communication Setting

- Baud Rate Select: 9600bps (fixed)

- Data bits: 8 bits (fixed)

- Parity: None (fixed)

- Stop Bits: 1 (fixed)

9.2.3 Command Message Reference

PC sends to Monitor command packet followed by “CR”. Every time PC sends

control command to the Monitor, the Monitor shall respond as follows:

1. If the message is received correctly it will send “+” (02Bh) followed by “CR”

(00Dh)

2. If the message is received incorrectly it will send “-” (02Dh) followed by “CR”

(00Dh)

9.3 Protocol

9.3.1 Set-Function Listing

The PC can control the TV/DS for specific actions. The Set-Function command

allows you to control the TV/DS behavior in a remote site through the RS232 port.

The Set-Function packet format consists of 9 bytes.

Set-Function description:

Length: Total Byte of Message excluding “CR”.

TV/DS ID Identification for each of TV/DS (01~98; default is 01)

ID “99” means to apply the set command for all connected

displays. Under such circumstances, only ID#1 display has to

reply.

The TV/DS ID can be set via the OSD menu for each TV/DS

set.

Command Type Identify command type,

“s” (0x73h): Set Command

“+” (0x2Bh): Valid command Reply

“-“ (0x2Dh): Invalid command Reply

Command: Function command code: One byte ASCII code.

Value[1~3]: Three bytes ASCII that defines the value.

CR 0x0D