Gefen GTB-MINI-PACS Manual do Utilizador descarregar pdf (Página 60)

RS-232 / TELNET COMMAND

Brid

Settin

-2

2 Feedback and Delimiter

ne advanta

e o

-232 serial control over IR control is that R

-232 o

ers

2-wa

communications between a device and the control s

stem. This allows

the controlled device to provide

eedback to con

ﬁ

rm that its operatin

state

atches the control s

stem

’

s assumptions. For example, when the control

stem sends Volume Up or Volume Down commands to the device,

eedback

allows the device to send its current volume settin

back to the control s

stem.

This prevents the device

rom

ettin

out o

nc with the controller, especiall

the user chan

es the volume manuall

on the device, or with an IR remote.

It also allows the control s

stem to accuratel

track the current power state, input

ettin

s, and other important data.

owever, in some cases, the controlled device mi

ht send more data than the

ontrol s

stem can easil

decode

(

parse

)

and act on, or ma

send random data

that the control s

stem does not require or understand.

Delimiters are supported b

the Mini PA

to control

eedback data sent

rom a

ontrolled device to the control s

stem. Delimiters allow the Mini PA

to i

nore,

or to collect and store the data, until a reco

nizable command arrives, and then

end that complete command to the control s

stem.

“S

tart Delimiter” is speci

ﬁ

ed, the Mini PA

will i

nore

eedback

rom th

ontrolled device until the speci

ﬁ

ed strin

characters arrives. The strin

be one, two, or three speci

ﬁ

ed hex characters

(

tes

)

rom

“

00” –

“ff

” each. Each

haracter can be speci

ﬁ

ed, or

“**

”ma

be used i

character can appear in the

trin

(

“

wild card”

)

When the

“S

tart Delimiter” is detected, the Mini PA

will be

in to collect the

data strin

that

ollows in an internal bu

er memor

until either

1. An

“

End Delimiter” has been speci

ﬁ

ed and is detected,

2. The speci

ﬁ

ed time-out is exceeded, or

. A speci

ﬁ

ed maximum number o

tes

(

up to 255

)

are collecte

When an

these events occur, the data in the bu

er is sent to the control

stem over the IP connection.

The

tart Delimiter, End Delimiter, Force

end Timeout, and Force

end B

ount can all be speci

ﬁ

ed in the Web Inter

ace, or throu

h Telnet commands.

The End Delimiter has the same parameters as the

tart Delimiter- zero, one,

two, or three characters or

“

wild cards”.

Note that the delimiters onl

ect

eedback

rom a controlled device- the

have

o e

ect on commands sent

rom the Mini PA

to the device.

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Gefen GTB-MINI-PACS Manual do Utilizador Página 60

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