Asus PQ321Q - Manual (Page 24)

2
E
Controlling the Monitor with a PC (RS-232C)
You can control this monitor from a PC via RS-232C (COM port) on
the PC.
PC connection
Connect the COM port on the PC (RS-232C connector) to the
CONTROL terminal (RS-232C input terminal) on the monitor using
the RS-232C conversion cable (supplied) and an RS-232 straight
cable (commercially available).
Bind the RS-232C conversion cable with the cable clamp.
RS-232 straight cable
(commercially available)
RS-232C conversion
cable (supplied)
To COM port
PC
CONTROL terminal
(RS-232C
input terminal)
Communication conditions
Set the RS-232C communication settings on the PC to match the
monitor’s communication settings as follows:
Baud rate * Stop bit 1 bit
Data length 8 bits Flow control None
Parity bit None
* Set to the same baud rate as the BAUD RATE setting of SETUP
menu. (Initial setting: 38400 bps)
Communication procedure
nCommand format
When a command is sent from the PC to the monitor, the monitor
operates according to the received command and sends a
response message to the PC.
C1 C2 C3 C4 P1 P2 P3 P4
Return code
Command field
(4 prescribed
alphanumerical characters)
Parameter field
(4 character string comprised of:
0-9, +, -, space, ?)
Example: VOLM0030
VOLM 30
* Be sure to input 4 characters for the parameter. Pad with spaces
(“ ”) if necessary.
(“ ” is a return code (0D
H , 0A H or 0D H ))
Wrong : VOLM30
Right : VOLM 30
When inputting a negative value, specify a numerical value in
three digits.
Example: OFSR-127
If a command has “R” listed for “Direction” in the
“RS-232C command table” on page 26, the current value can be
returned by using “?” as the parameter.
Example:
VOLM ? ? ? ?
• From PC to monitor (How much
is current volume setting?).
30
• From monitor to PC (Current
volume setting: 30).