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<Repeater control>

This system has a function to allow setting of multiple monitors connected in a daisy chain using a
single command. This function is called repeater control.
Up to about 20 monitors can be connected, depending on the length of RS-232C cables and
installation environment.
You can use Repeater control function without assigning ID numbers.

PC

Set 1

Set 2

Set 3

Set 4

[Example]

If monitors are connected as shown above, you can execute a command like “Set all
monitors’ input settings to INPUT”.

<Repeater control command>

Repeater control is achieved by setting the FOURTH CHARACTER of the parameter to “+”.

Example: VOLM030+

← Sets volume of all monitors to 30.

In repeater control, responses are returned by all the connected monitors.*
If you want to determine that a value has been returned by a specific set, assign ID numbers to
each monitor in advance.
If no response is returned, this may be because the monitor has not received (or is still pro-
cessing) the command, so it is possible that new commands may not be executed even if they
are sent.
* If power is turned “OFF” using Repeater control, only the monitor closest to the PC returns a

response.

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.

Repeater control can also be used for reading settings.

Example:

VOLM???+
WAIT
10

001

20

002

30

003

40

004

Volume settings for all monitors are returned.

» If repeater control is used during ID designation (IDSL, IDLK), the ID designation is cancelled.

<Response format in  Advanced operation >

■ Normal response

1Response when no ID number has been set.

O

Carriage return code
(0D

H

, 0A

H

)

K

↵

A response is returned when execution of the
pertinent command is finished.

2Response when an ID number has been set.

O

ID number of

responding monitor

Carriage return code
(0D

H

, 0A

H

)

K

SPC

0

0

1

↵

Space (20

H

)

■ When a command has not been executed correctly*

1Response when no ID number has been set.

E

Carriage return code
(0D

H

, 0A

H

)

R

R

↵

2Response when an ID number has been set.

E

Carriage return code
(0D

H

, 0A

H

)

R

R

SPC

0

0

1

↵

ID number

Space (20

H

)

* 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-adjustment with video display).

* If communication has not been established for reasons like a bad connection with the monitor,

nothing is returned (not even ERR).

* If no monitor has been assigned the designated ID number (e.g. if the command IDSL0002[X] is

issued, but no monitor with ID=002 is found), ERR

XXX[X] is returned.

(ID number at the furthest end)

In the above case
IDSL0004

←Non-existent ID number

WAIT
ERR 003

←Monitor with ID=3 at the furthest end returns ERR

PC

Set 1

Set 2

Set 3

[Example]

■ If execution of the command is taking some time.

W

Carriage return code
(0D

H

, 0A

H

)

A

I

T

↵

If execution of a command takes some time, WAIT may be returned as the returned value. In this
case, a value will be returned if you wait a while. During this time, new commands will not be
received, even if they are sent.

No ID number is attached to WAIT response.

L

O

C

K

E

D

↵

Carriage return code
(0D

H

, 0A

H

)

T

Carriage return code
(0D

H

, 0A

H

)

I

M

E

O

U

T

↵

Carriage return code
(0D

H

, 0A

H

)

T

I

M

E

O

U

T

0

0

1

↵

SPC

Space (20

H

)

• Cases where WAIT is returned

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, INP1, INP2, INP3, INPC, INPS, ITGD,

IAVD, IPCD, CLSY, ASNC, WIDE, EMAG, EPOS, PXSL, POWR

■ When control via RS-232C is locked (to prevent use) using the Control lock function (see page 52).

■ If a timeout occurs while waiting for a command

■ If a timeout occurs while waiting for a command (when the monitor waiting for the command is

assigned an ID number = 001 in the following example)

■ If the current parameter is read out using "?" for the parameter (for numerical values etc.)

1Response when no ID number has been set.

<Example>

VOLM????
10

2Response when an ID number has been set. (In the example below: ID=001)

<Example>

VOLM????
10

001

VOLM0020
OK

INP10000
OK

Leave an interval of 100 ms

<Communication interval>

If the next command is sent in the interval before OK or ERR is returned, it will basically be ignored.
(Exception: Forced end using ASNC command)
Leave an interval of 100 ms between command response and transmission of the next command.
You can use Repeater control function without assigning ID numbers.