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PN-S655

CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTION

2 – 12

■ Communication conditions

Set the RS-232C communication settings on the PC to match the moni-

tor's communication settings as follows:

■ 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.

* Be sure to input 4 characters for the parameter. Pad with spaces

(“

”) if necessary.

(“

” is a return code (0DH, 0AH or 0DH))

Wrong : VOLM30
Right

: VOLM

30

When inputting a negative value, specify a numerical value in three dig-

its.

Do not use spaces for MPOS, DATE, and SC01 through SC08. Specify

parameters using a specified number of characters.

If a command has “R” listed for “DIRECTION” in the “RS-232C com-
mand table” on page 16, the current value can be returned by using “?”

as the parameter.

■ Response code format

<When a command has been executed correctly>

A response is returned after a command is executed.

*If an ID number has been assigned

<When a command has not been executed>

*If an ID number has been assigned

Note:

• “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

 is used, but no monitor with ID number: 2 is

found), no response is returned.

• If RS-232C/LAN COMMAND is set to options other than NORMAL,

the return code for a response is 0D

H

 only.

<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, EMHV, EPHV, ESHV

<When control via RS-232C is locked (to prevent use) 
using the operation lock function>

Baud rate

9600 bps

Data length

8 bits

Parity bit

None

Stop bit

1 bit

Flow control

None 

C1 C2 C3 C4 P1 P2 P3 P4 

Return code 

(4 prescribed  

alphanumerical characters) 

Parameter field 

(4 character string comprised of: 

0-9, +, -, space, ?)

 Example:  VOLM0030
 VOLM 

 

 30

 Example: AUTR-009

 Example: MPOS010097

 Example:

VOLM ? ? ? ?

From PC to monitor (How much 
is current volume setting?).

30

From monitor to PC 
(Current volume setting: 30).

∗ If an ID number has been assigned 

(For example, ID number = 1).

VOLM 

?

From PC to monitor.

30 

 001

From monitor to PC.

O K 

Return code
(0D

H

, 0A

H

)

O K 

SPC 

0  0  1 

ID number of responding monitor 

Space (20

H

) 

Return code
(0D

H

, 0A

H

)

R R 

E 

Return code
(0D

H

, 0A

H

)

R R 

E SPC 

0 

0 

1 

ID number 

Space (20

H

) 

Return code
(0D

H

, 0A

H

)

I 

W T 

A 

Return code
(0D

H

, 0A

H

)

E 

C D 

K 

O 

L 

Return code
(0D

H

, 0A

H

)

PN-S655

CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTION

2 – 13

<When RS-232C/LAN SELECT is set to LAN>

■ Communication interval

•  After OK or ERR is returned, you must send the following commands.

To set a timeout for the command response, specify 10 seconds or

longer.

• Provide an interval of 100 ms or more between the command

response and the transmission of the next command.

Note:

•  When executing ALL RESET, set the timeout period to 30 seconds or

longer.

•  When turning the power on while the POWER ON DELAY function is

in use, set the timeout period to the POWER ON DELAY period + 10

seconds or longer.

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.

■ 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.

You can assign ID numbers either from the menu screen (using the

remote control) or from the PC using RS-232 cable.

If monitors are connected as shown above, you can execute com-

mands 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.
ID numbers do not have to be assigned in ascending order starting from

the PC. They can also be connected as shown below.

■ Commands for ID control

The command examples shown on this page assume the following con-

nection and ID number set up.

Note:

You can automatically assign ID numbers by using the IDST command

with the Repeater control.

For example, using the command “IDST001+” automatically sets the ID

numbers, as shown below.

U N S E L  E C T E D 

Return code
(0D

H

, 0A

H

)

VOLM0020 

OK 

 

 

INPS0001 

WAIT 

OK 

Interval of 100 ms or more

[Example] 

ID number: 1 

ID number: 2 

ID number: 3 

ID number: 4

[Example] 

ID number: 3 

ID number: 2 

ID number: 4 

ID number: 1

A monitor receiving this command sets its own ID number in
the parameter field.

The parameter of this command sets the ID number of the
monitor. The monitor is subject to the next command.

ID number: 1 

ID number: 2 

ID number: 3 

ID number: 4

 Example:

IDST0001

OK 

 001

The ID number of this monitor is set to 1.

[Example] 

ID number: 1 

ID number: 2 

ID number: 3 

ID number: 4

IDST001 +

ID setting command with repeater control

WAIT

OK 

 001

“OK” response from ID number: 1

OK 

 002

“OK” response from ID number: 2

OK 

 003

“OK” response from ID number: 3

OK 

 004

“OK” response from ID number: 4 (End)

 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

Sets volume of monitor with ID 
number: 2 to 30.

WAIT

Processing

OK 

 002

OK response from monitor with ID 
number: 2

VOLM0020

Sets 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.*

*   The IDSL command is effective only once, for the 

immediately succeeding command.

PN-S655

CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTION

2 – 14

■ Repeater control

This system has a function to allow setting of multiple monitors con-

nected in a daisy chain using a single command.
This function is called repeater control. You can use Repeater control

function without assigning ID numbers.

*If monitors are connected as shown above, you can execute a com-

mand like “Set all monitors’ input settings to PC1 DVI-D”.

■ Repeater control command

Repeater control is achieved by setting the FOURTH CHARACTER of

the parameter to “+”.

In repeater control, responses are returned by all the connected moni-

tors.
If you want to determine that a value has been returned by a specific

set, assign ID numbers to each monitor in advance.

When some monitors do not return their responses, the probable cause
is that the monitors could not receive the command or command pro-

cessing is not complete. Do not send a new command.

Repeater control can also be used for reading settings.

Note:

• If repeater control is used during ID designation (IDSL, IDLK), the ID

designation is canceled.

IDLK: The parameter of this command sets the ID number of the

monitor. The monitor is subject to all subsequent commands.

IDCK: Provides screen display of the ID number currently assigned to

a monitor, and the ID number currently set for IDLK (if any).

 Example: 

IDLK0002

Following commands are for the monitor 
with ID number: 2.

WAIT

Searching for monitor with ID number: 
2

OK 

 002

Found monitor with ID number: 2

VOLM0030

Sets volume of monitor with ID 
number: 2 to 30.*

WAIT

Processing

OK 

 002

VOLM0020

Sets volume of monitor with ID 
number: 2 to 20.*

WAIT

OK 

 002

IDLK0000

Canceling fixed ID number settin

WAIT

Canceling IDLK

OK 

 002

Cancelation complete

VOLM0010

OK 

 001

The volume of the monitor with ID number: 
1 (the one directly connected to the PC) is 
set to 10. (IDLK is canceled.)

*   The IDLK command remains effective until it is 

canceled, or power is shut off.

 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. (If a command 
is used with repeater control, ID 
designation using IDSL or IDLK 
is canceled.)

WAIT

ID : 001    IDLK : 000

ID : 002    IDLK : 000

ID : 003    IDLK : 000

ID : 004    IDLK : 000

[Example] 

Set 1 

 

Set 2 

Set 3

Set 4

Example:

VOLM030 +

Sets volume of all monitors to 30.

Example:  (When 4 monitors are connected, and 

assigned ID numbers: 1 through 4)

VOLM030 +

WAIT

OK 

 001

OK 

 002

OK 

 003

OK 

  004

If 4 monitors are connected in 
a chain, reliable operation can 
be ensured by sending a new 
command only after a reply 
has been returned by 4th (last) 
monitor.

Example:

VOLM ? ? ? +

WAIT

10 

 001

Volume settings for all 
monitors are returned.

20 

 002

30 

 003

30 

 004

PN-S655

CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTION

2 – 15

■ Power control/Input mode selection

■ SCREEN menu

Command: Command 

field

Direction:

W

When the “Parameter” is set in the parameter field, the command functions as described under “Control/
Response Contents”.

R

The returned value indicated under “Reply” can be obtained by setting “????”, “

?” or “???+”

(repeater control) in the parameter field.

Parameter:

Parameter field

Reply:

“A” indicates a command which can be used in power standby mode regardless of the STANDBY MODE setting.

“B” indicates command which can be used in power standby mode when STANDBY MODE is set to STANDARD.
(It cannot be used in the power standby mode when LOW POWER is selected.)

“

Æ

” indicates a command which cannot be used in power standby mode.

POWER CONTROL

POWR

W

0

 

Switches to standby mode.

A

1

Returns from standby mode.

R

0

Standby mode

1

Normal mode

2

Input signal waiting mode

INPUT MODE SELECTION

INPS

W

0

Toggle change for input mode. Terminals not selected in DVI SELECT/
BNC SELECT/HDMI SELECT cannot be selected.

B

1

PC1 DVI-D
“ERR” when AV1 DVI-D is selected for DVI SELECT.

2

PC3 D-SUB

3

AV3 COMPONENT
“ERR” when PC4 RGB is selected for BNC SELECT.

4

AV5 VIDEO

6

PC4 RGB 
“ERR” when AV3 COMPONENT is selected for BNC SELECT.

7

AV1 DVI-D
“ERR” when PC1 DVI-D is selected for DVI SELECT.

8

AV4 S-VIDEO

9

AV2 HDMI
“ERR” when PC2 HDMI is selected for HDMI SELECT.

10

PC2 HDMI
“ERR” when AV2 HDMI is selected for HDMI SELECT.

R

1

PC1 DVI-D

A

2

PC3 D-SUB

3

AV3 COMPONENT

4

AV5 VIDEO

6

PC4 RGB

7

AV1 DVI-D

8

AV4 S-VIDEO

9

AV2 HDMI

10

PC2 HDMI

AUTO

ASNC

W

1

When the input mode is PC3, PC4.

-

CLOCK

CLCK

WR

0-1200

0-1200

When the input mode is PC3, PC4. Varies depending on the signal.

PHASE

PHSE

WR

0-63

0-63

When the input mode is PC3, PC4.

POSITIONING

POSITION OF 
THE LONGEST 
DIRECTION

HPOS

WR

0-100

0-100

0-800 on PC3/PC4.  
Varies depending on the signal.

POSITION OF 
THE SHORTEST 
DIRECTION

VPOS

WR

0-100

0-100

0-200 on PC3/PC4. 
Varies depending on the signal.

SIZE

POSITION OF 
THE LONGEST 
DIRECTION

HSIZ

WR

0-100

0-100

POSITION OF 
THE SHORTEST 
DIRECTION

VSIZ

WR

0-100

0-100

RESOLUTION

H-RESOLUTION

HRES

WR

300-1920

300-1920

When the input mode is PC3, PC4.  
Only even numbers are valid for parameters. 
Varies depending on the signal.

V-RESOLUTION

VRES

WR

200-1200

200-1200

RESET

ARST

W

1