DOWNLOAD Sharp LC-M3700 (serv.man29) Service Manual ↓ Size: 1.49 MB | Pages: 43 in PDF or view online for FREE

Model
LC-M3700 (serv.man29)
Pages
43
Size
1.49 MB
Type
PDF
Document
User Manual / Operation Manual
Brand
Device
TV / LCD / part-2 PC Operation, Settings adjustments, Troubleshooting , Appendix
File
lc-m3700-sm29.pdf
Date

Sharp LC-M3700 (serv.man29) User Manual / Operation Manual ▷ View online

GB
 
36
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.
C1
Command field
(4 prescribed
alphanumerical
characters)
Parameter field
(4 character string
comprised of:
0-9, +, –, space, ?)
Carriage return code
C2
C3
C4
P1
P2
P3
P4
O
Carriage return code
(0D
H
, 0A
H
)
K
Example:
VOLM0030
POWR
1   (“
” indicates a space.)
* Be sure to input 4 characters for the parameter. Pad with spaces if necessary.
× VOLM30
䡩 VOLM
30(
) (“
” indicates a space, “
”  is the carriage return code
 (0D
H
, 0A
H
 or 0D
H
).)
If a command has “R” listed for “Direction” in the “RS-232C Command table” on page 44, the cur-
rent value can be returned by using “?” as the parameter.
Example: 1If an ID number has not been set:
VOLM????
←From PC to monitor (current volume setting: ?)
30
←From monitor to PC (current volume setting: 30)
2If an ID number has been assigned (For example, ID number = 001)
VOLM
?
←PC to monitor (“ ” indicates a space)
30
001
←Monitor to PC (“ ” indicates a space)
<Response code format>
■ When a command has been executed correctly
This is returned when execution of the command is
finished.
■ When a command has not
been executed correctly*
E
Carriage return code
(0D
H
, 0A
H
)
R
R
* 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 execution of the command is
taking some time
W
Carriage return
code (0D
H
, 0A
H
)
A
I
T
If a command takes some time to execute, WAIT may
be returned as the return value. Wait for a moment, and
OK or ERR will be returned. New commands cannot be
received during this time, even if they are sent.
PC Operation (Continued)
■ If RS-232C is locked
If RS-232C control has been locked with Control lock
(see page 52), LOCKED is returned as the returned
value.
L
Carriage return code
(0D
H
, 0A
H
)
K
E
D
O
C
37 
GB
PC Operation
Continued on the next page.
Advanced operation
■ This section explains commands for daisy chain connection. The basic communication procedure is
the same as in the “Basic operation” section.
<ID numbers>
You can assign a unique ID number to each monitor (see page 54). This allows you to control a
particular monitor in a daisy chain of monitors.
Up to about 20 monitors can be connected, depending on the length of RS-232C cables and
installation environment.
You can assign ID numbers either from the menu screen (via remote control or the control buttons on
the monitor) or from the PC using RS-232C cable.
PC
ID number: 1
ID number: 2
ID number: 3
ID number: 4
[Example]
If monitors are connected as shown above, you can execute commands like “Set the volume of the
monitor with ID 4 to 20”.
When controlling monitors linked in a daisy chain by designating ID numbers, you should basically
avoid any duplication of ID numbers.
If the same ID number is assigned to multiple monitors, only the monitor closest to the PC can be
controlled with that ID number.
If monitors are connected as shown below, only the monitor 1 can be accessed with ID number 2.
Monitor 2 cannot be controlled using that ID number.
PC
ID number: 1
ID number: 2
ID number: 2
ID number: 3
[Example]
ID numbers do not have to be assigned in ascending order starting from the PC. They can also be
connected as shown below.
PC
ID number: 3
ID number: 2
ID number: 4
ID number: 1
[Example]
PC Operation (Continued)
GB
 
38
<Commands for ID control>
The command examples shown on this page assume the following connection and ID number set
up.
PC
ID number: 1
ID number: 2
ID number: 3
ID number: 4
IDST······A monitor receiving this command sets its own ID number in the parameter field.
Example:
IDST0001
OK
001
 ←The ID number of this monitor is set to 1.
Note
After linking monitors, you can automatically assign ID numbers by using the IDST command with
the Repeater control (see “Repeater control” on page 40).
PC
Set 1
Set 2
Set 3
Set 4
[Example]
If you connect monitors as shown above, and use the command “IDST001+”, ID numbers
will be set automatically, as shown below.
PC
ID number: 1
ID number: 2
ID number: 3
ID number: 4
[Example]
IDST001+
←ID setting command with repeater control
WAIT
OK
001
←ID = “OK” response from ID number=1
OK
002
←ID = “OK” response from ID number=2
OK
003
←ID = “OK” response from ID number=3
OK
004
←ID = “OK” response from ID number=4 (End)
PC Operation (Continued)
39 
GB
PC Operation
IDSL······ The parameter of this command sets the ID number indicating the monitor subject to the
next command.
Example:
IDSL0002
← The next command is for the monitor with ID number=2.
WAIT
← Searching for monitor with ID number=2.
OK
002
← Found monitor with ID number=2
VOLM0030
← Set volume of monitor with ID number=2 to 30
WAIT
← Processing
OK
002
← OK response from monitor with ID number=2
VOLM0020
← Set volume to 20
OK
001
← The volume of the monitor with ID number=1
(the one directly connected to the PC) is set to
20.
IDLK······ The parameter of this command sets the ID number indicating the monitor subject to all
subsequent commands.
Example:
IDLK0002
← Following commands are for the monitor whose ID number is “2”.
WAIT
← Searching for monitor with ID number=2.
OK
002
← Found monitor with ID number=2
VOLM0030
← Set volume of monitor with ID number=2 to 30
WAIT
← Processing
OK
002
VOLM0020
← Set volume of monitor with ID number=2 to 20
WAIT
OK
002
IDLK0000
← Cancelling ID number setting
WAIT
← Cancelling IDLK
OK
002
← Cancellation complete
VOLM0010
OK
001
← The volume of the monitor with ID number=1 (the one directly connected
to the PC) is set to 10.
IDCK······ Provides screen display of the ID number currently assigned to a monitor, and the ID
number currently set for IDLK (if any).
Example:
(After executing IDLK0002)
IDCK0000
← (Parameter has no meaning)
ID:001  IDLK:002
← Returned response. The ID number is also displayed on the
monitor screen.
IDCK000+
← Repeater control
WAIT
ID:001  IDLK:002
ID:002  IDLK:002
ID:003  IDLK:002
ID:004  IDLK:002
Continued on the next page.
PC Operation (Continued)
The IDSL command is
effective only once, for the
immediately succeeding
command.
The IDLK command
remains effective until it is
cancelled, or power is shut
off.
(If a command is used with repeater control, ID designation using
IDSL or IDLK is cancelled.)
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