Read Sharp PN-525E (serv.man3) Service Manual online
PN-525E
CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTION
2 – 10
2-4. 232C CONTROL
(1) Communication procedure
<Command format>
When a command is sent from the PC to the monitor, the monitor oper-
ates according to the received command, and sends a response mes-
sage to the PC.
Example: VOLM0030
VOLM
30
*Be sure to input 4 characters for the parameter. Pad with spaces
(“
”) if necessary.
(“[Enter]” is a return code (0DH, 0AH or 0DH))
Wrong : VOLM30 [Enter]
Right : VOLM
Right : VOLM
30 [Enter]
When inputting a negative value, specify a numerical value in three digits.
Example: AUTR-009
Do not use spaces for MPOS, DATE, and SC01 through SC08. Spec-
ify parameters using a specified number of characters.
Example: MPOS010097
If a command has “R” listed for “DIRECTION” in the “RS- 232C com-
mand table”, the current value can be returned by using “?” as the
parameter.
parameter.
Example :
VOLM????
1 From PC to monitor
(How much is current volume setting?)
30
1 From monitor to PC (Current volume setting: 30)
If an ID number has been assigned (For example, ID number
=
1)
VOLM
?
1 From PC to monitor
30
001
1 From monitor to PC
<Response code format>
• “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).
• If no monitor has been assigned the designated ID number (e.g. if the
command IDSL0002 [Enter] is used, but no monitor with ID number: 2
is found), no response is returned.
■ If execution of the command is taking some time
When the following commands are used, “WAIT” is returned.
In this case, a value will be returned if you wait a while. Do not send any
command during this period.
No ID number is attached to WAIT response.
• Commands which return WAIT:
1 When repeater control is used
2 When an IDSL or IDLK command is used
3 When one of the following commands is used:
RSET, INPS, ASNC, WIDE, EMAG, EPOS, PXSL, POWR,
AGIN, MWIN, MWIP, MWPP, ESTG
■ When control via RS-232C is locked (to prevent use) using the
operation lock function
Advanced operation
This section explains commands for daisy chain connection. The basic
communication procedure is the same as in the “One-to-one connection
with a PC” section.
with a PC” section.
<ID numbers>
You can assign a unique ID number to each monitor. This allows you to
control a particular monitor in a daisy chain of monitors.
control a particular monitor in a daisy chain of monitors.
You can assign ID numbers either from the menu screen (using the
remote control) or from the PC using RS-232C cable.
[Example]
If monitors are connected as shown above, you can execute commands
like “Set the volume of the monitor with ID 4 to 20”.
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.
■ When a command has been executed correctly
A response is returned after a command is executed.
* If an ID number has been assigned
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, ?)
O
K
Return code (0D
H
, 0A
H
)
O
K
SPC
0
0
1
ID number of responding monitor
Space (20H)
Return code (0DH, 0AH)
■ When a command has not been executed
*If an ID number has been assigned
R
R
E
Return code (0D
H
, 0A
H
)
R
R
E
SPC
0
0
1
ID number
Space (20H)
Return code (0DH, 0AH)
I
W
T
A
Return code (0D
H
, 0A
H
)
E
C
D
K
O
L
Return code (0D
H
, 0A
H
)
ID number: 1 ID number: 2 ID number: 3 ID number: 4
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