35
E
Controlling the Monitor with a computer (RS-232C)
You can control this monitor from a computer via RS-232C
(COM port) on the computer.
You can also connect multiple monitors via a daisy chain by
using a computer. By assigning ID numbers to each monitor
(see page 36), you can make input mode selection/adjustment
or can check the status of a specific monitor.
TIPS
• To control the monitor via RS-232C, set POWER SAVE
MODE to OFF.
Computer connection
n
One-to-one connection with a computer
Connect with RS-232 straight cable between the computer’s
COM port (RS-232C connector) and the RS-232C input
terminal on the monitor.
To COM port
Computer
RS-232C
input terminal
RS-232 straight cable
(commercially available)
n
Daisy chain connection…
Advanced operation
PN-Y556/PN-Y496/PN-Y436/PN-Y326 or PN-Y555/PN-Y475/
PN-Y425/PN-Y325 monitors can be connected together in a
daisy chain connection.
Connect with RS-232 straight cable between the computer’s
COM port (RS-232C connector) and the RS-232C input
terminal on the first monitor.
Next, connect RS-232 straight cable to the first monitor’s
RS-232C output terminal and to the second monitor’s
RS-232C input terminal. Connect in the same way to the third
and subsequent monitors.
Up to 25 monitors can be connected. (Depending on the
length of the cable used and the surrounding environment.)
To COM port
Computer
First monitor
Second monitor
RS-232C
output
terminal
RS-232C
output
terminal
RS-232C
input
terminal
RS-232C
input
terminal
RS-232 straight cables
(commercially available)
Communication conditions
Set the RS-232C communication settings on the computer 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 computer to the monitor,
the monitor operates according to the received command and
sends a response message to the computer.
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
Do not use spaces for DATE. Specify parameters using a
specified number of characters.
If a command has “R” listed for “DIRECTION” in the
“RS-232C command table” on page 39, the current value can
be returned by using “?” as the parameter.
Example:
VOLM ? ? ? ?
←
From computer to monitor
(How much is current volume
setting?).
30
←
From monitor to computer
(Current volume setting: 30).
* If an ID number (see page 36) has been assigned
(For example, ID number = 1).
VOLM
?
←
From computer to
monitor.
30 001
←
From monitor to
computer.
