Ncommunication interval, Nid numbers – Sharp PN-S655 User Manual

Page 13

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E

13

Controlling the Monitor with a PC (RS-232C)

n

Response code format

When a command has been executed correctly

O

K

Return code

(0D

H

, 0A

H

)

A response is returned after a command is executed.

* If an ID number has been assigned

O

K SPC 0

0

1

ID number of responding monitor

Space (20

H

)

Return code

(0D

H

, 0A

H

)

When a command has not been executed

R

R

E

Return code

(0D

H

, 0A

H

)

* If an ID number has been assigned

R

R

E

SPC 0

0

1

ID number

Space (20

H

)

Return code

(0D

H

, 0A

H

)

TIPS

• “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

I

W

T

A

Return code

(0D

H

, 0A

H

)

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 (see page 11)

E

C

D

K

O

L

Return code

(0D

H

, 0A

H

)

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

U N S E L E C T E D

Return code

(0D

H

, 0A

H

)

n

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.

VOLM0020
OK


INPS0001
WAIT
OK

Interval of 100 ms or more

TIPS

• 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.

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.

n

ID numbers

You can assign a unique ID number to each monitor (see

page 7). 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.

[Example]

ID number: 1 ID number: 2 ID number: 3 ID number: 4

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.

ID numbers do not have to be assigned in ascending order

starting from the PC. They can also be connected as shown

below.

[Example]

ID number: 3 ID number: 2 ID number: 4 ID number: 1

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