Controlling The Monitor With A Computer (Rs-232C); Computer Connection; Communication Conditions; Communication Procedure - Sharp PN-B501 Operation Manuals

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 RS-232C/LAN
SELECT to RS-232C.
• You cannot use RS-232C and LAN control simultaneously.

Computer connection

nOne-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.
RS-232C RS-232 straight cable
input terminal (commercially available)
nDaisy 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.)
Second monitor
RS-232C
input
terminal
First monitor
RS-232C
input
terminal
Computer
To COM port
Advanced operation
RS-232 straight cables
(commercially available)
Computer
To COM port

Communication conditions

Set the RS-232C communication settings on the computer to
match the monitor's communication settings as follows:
Baud rate *
Data length 8 bits
Parity bit None
* Set to the same baud rate as the BAUD RATE setting of
SETUP menu. (Initial setting: 38400 bps)
* When connecting multiple monitors in a daisy chain, set all
monitors to the same BAUD RATE.

Communication procedure

nCommand 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
Command field
(4 prescribed
alphanumerical characters)
Example: VOLM0030
VOLM 30
* Be sure to input 4 characters for the parameter. Pad with
spaces (" ") if necessary.
(" " is a return code (0D
Wrong : VOLM30
Right : VOLM 30
When inputting a negative value, specify a numerical value in
three digits.
Example: OFSR-127
When the parameter part is 5 or more characters, specify
parameters using a specified number of characters without
using spaces.
Example: MPOS010097
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 ? ? ? ? ←
30 ←
* If an ID number (see page 36) has been assigned
(For example, ID number = 1).
VOLM ? ←
30 001 ←
Stop bit 1 bit
Flow control None
Return code
P1 P2 P3 P4
Parameter field
(4 character string comprised of:
0-9, +, -, space, ?)
, 0A or 0D ))
H H H
From computer to monitor (How
much is current volume setting?).
From monitor to computer
(Current volume setting: 30).
From computer to monitor.
From monitor to computer.
35
E