VIEWSONIC VS11857 - Manual (Page 59)

ViewSonic CD3200 ix
5 Remote Control Pass-through mode
When PC sets the LCD monitor to Remote Control Pass through mode, the LCD shall send a three bytes
packet (followed by “CR”) in response to RCU button activation.
Note, that in this mode the RCU shall have no
effect on the monitor function. For example: “+Volume” will not change the volume in the LCD but only sends
“+Volume” code to PC over the RS232 port.
Remote Control pass-through packet format from LCD monitor to PC(ASCII)
Name Length RCU-Code1 RCU-Code2 CR
Byte Count 3 MSB LSB 00D
Bytes order 1 2 3 4
Example: Remote Control pass-through when “Menu” key is pressed (1A)
Name Length RCU-Code1 RCU-Code2 CR
Byte Count 3 1 A 00D
Bytes order 1 2 3 4
Example: Remote Control pass-through when key “1” is pressed (01)
Name Length RCU-Code1 RCU-Code2 CR
Byte Count 3 0 1 00D
Bytes order 1 2 3 4
Example: Remote Control pass-through when “OK” key is pressed (1F)
Name Length RCU-Code1 RCU-Code2 CR
Byte Count 3 1 F 00D
Bytes order 1 2 3 4