Communication Procedure - Sharp LC-M3700 Operation Manual

PC Operation (Continued)

Communication procedure

Basic operation
<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.
Example: VOLM0030
If a command has "R" listed for "Direction" in the "RS-232C Command table" on page 46, the cur-
rent value can be returned by using "?" as the parameter.
Example: 1If an ID number has not been set:
<Response code format>
I When a command has been executed correctly
O K
I When a command has not
been executed correctly*
E R
I If execution of the command is
taking some time
W A
I If RS-232C is locked
L O
38
US
C1 C2 C3 C4
Command field
(4 prescribed
alphanumerical
characters)
POWR 1 (" " indicates a space.)
* Be sure to input 4 characters for the parameter. Pad with spaces if necessary.
× VOLM30
VOLM 30( ) (" " indicates a space, " " is the carriage return code
VOLM????
30
2If an ID number has been assigned (For example, ID number = 001)
VOLM
30 001
Carriage return code
(0D , 0A )
H H
↵
Carriage return code
(0D , 0A )
H H
↵
R
Carriage return
code (0D
↵
I T
Carriage return code
(0D , 0A )
H H
C K E D
P1 P2 P3
Parameter field
(4 character string
comprised of:
0-9, +, –, space, ?)
(0D , 0A or 0D ).)
H H H
←From PC to monitor (current volume setting: ?)
←From monitor to PC (current volume setting: 30)
? ←PC to monitor (" " indicates a space)
←Monitor to PC (" " indicates a space)
This is returned when execution of the command is
finished.
* This is returned when there is no such command,
or when the command cannot be used in the
current state of the monitor (i.e. video auto-adjust-
ment with video display).
* If there is a bad connection between the PC and
monitor, or if communication has not been estab-
lished, nothing is returned (not even ERR).
If a command takes some time to execute, WAIT may
be returned as the return value. Wait for a moment, and
, 0A )
H H
OK or ERR will be returned. New commands cannot be
received during this time, even if they are sent.
If RS-232C control has been locked with Control lock
(see page 54), LOCKED is returned as the returned
↵
value.
Carriage return code
↵
P4