Operation Manual

29
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 with RS-232 cross cable between the PC’s COM port
(RS-232C connector) and the RS-232C input terminal on the
monitor.
RS-232 cross cable
(commercially available)
To COM port
PC
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 9600bps Stop bit 1 bit
Data length 8 bits Flow control None
Parity bit None
Communication procedure
n
Command 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: VOLM030
* Be sure to input 4 characters for the parameter. Pad with
spaces (“
”) if necessary.
(“
” is a return code (0D
H
))
Wrong : VOLM30
Right : VOLM030
The current value can be returned by using “????” or “? ”
as the parameter.
Example:
VOLM ? ? ? ? ←
From PC to monitor (How much
is current volume setting?).
30 ←
From monitor to PC (Current
volume setting: 30).
Wrong : VOLM ?
Right : VOLM ?
n
Response code format
When a command has been executed correctly
O K
Return code
(0DH)
A response is returned after a command is executed.
When a command has not been executed
R R E
Return code
(0DH)
TIPS
• “ERR”isreturnedwhenthereisnorelevantcommandor
when the command cannot be used in the current state of
the monitor.
• Ifcommunicationhasnotbeenestablishedforreasons
such as a bad connection between the PC and monitor,
nothing is returned (not even ERR).
• “ERR”maybereturnedwhenacommandcannotbe
received correctly due to interference from the surrounding
environment.
Please ensure that the system or software retries the
command if this occurs.
n
Communication interval
• AfterOKorERRisreturned,youmustsendthefollowing
commands.
To set a timeout for the command response, specify 10
seconds or longer.
• Provideanintervalof100msormorebetweenthe
command response and the transmission of the next
command.
• WhenQUICKSTARTissettoOFF,sendacommandafter
waiting for more than 1 minute if you perform the following
operation.
- Connecting the power cord
- Turning power on
- Turning power off