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IPL T SF24 and IPL T SFI244 • Communication and Control
IPL T SF24 and IPL T SFI244 • Communication and Control
Communication and Control, cont’d
Customization
In the IPL T interface family, varying degrees of customization
are possible. Server side includes make it possible to obtain
information from the unit and display the information on Web
pages. URL encoding allows you to send information and
commands to the unit to change its configuration or provide
you with feedback.
Server side includes
Server sides includes (SSIs) are a type of HTML comment that
directs the Web server to dynamically generate data for a Web
page whenever it is requested. SSIs typically use Extron’s
Simple Instruction Set (SIS) to communicate commands to the
products or attached control devices. Using SSIs, custom pages
can be designed and displayed, with IPL T interface information
provided by the SIS commands.
The basic format for an Extron SSI is:
<!—#echo var=”x”—>
Where x is the SIS command to be executed.
The SIS instructions sent to IP Link-enabled products fall into
two categories: “host” or “remote”.
1. Host commands instruct the IP Link product to act or
respond.
2. Remote commands pass data to an external control
port on an IP Link product.
When a Web page is requested, the Web server removes the SSI
and replaces it with the answer to the SIS command within
quotes.
Figure 4-22 — Example of SSI “host” command
In figure 4-22 above, the “N” command is used to request the IP
Link product’s part number.
<!--#echo var=" "-->
SIS Command
Server Side Include Using
the Host SIS command
*type with no spaces
SIS command
to be processed
by the IP Link
N
4-28
Command ASCII (Telnet) URL Encoded (Web) Response
Event Control
Read event buffer memory
27
Esc
X35
,
X36
,
X37
,
X38
E W
X35
X36
,
X37
,
X38
E|
X54
Read event status
27
Esc
X35
E W
X35
E| <see
X48
>
Write event memory
24
27
Esc
X35
,
X36
,
X37
,
X39
,
X38
E W
X35
,
X36
,
X37
,
X39
,
X38
E| Evt
X39
Read string from event memory
27
Esc
X35
,
X36
,
X37
,
X44
FE W
X35
,
X36
,
X37
,
X44
FE| {string}
Write string to event memory
24
27
Esc
X39
*
X35
,
X36
,
X37
FE W
X39
%2A
X35
,
X36
,
X37
FE| Evt
X39
Start Events
24
27
Esc 1AE W1AE| Ego
Stop Events
24
27
Esc 0AE W0AE| Est
Read number of events running Esc AE WAE| Enm#
Reset (ZAP)/Erase Commands
Erase user-supplied Web Esc filename EF WfilenameEF| Del•filename
page and files
24 28
Erase flash memory
24
Esc ZFFF WZFFF| Zpf
Reset all device setting to factory
24
Esc ZXXX WZXXX| Zpx
Absolute System Reset
24
Esc ZQQQ WZQQQ| Zpq
(Includes IP address = 192.168.254.254, subnet mask = 255.255.0.0)
Commit RAM to Flash Esc 1FF
W1FF| Nvr
X6
(responds when done)
View whether RAM needs Esc FF
WFF|
X6
to be saved to Flash.
4-29