Download Using HiBeam Screens

Using HiBeam Screens
Application Note
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Using HiBeam Screens
When using HiBeam screens to monitor control
applications, you can choose from several possible
configurations. You can also run screens on virtual
targets for simulation purposes.
You can run screens on any platform having a Javatechnology enabled browser. The performance of a
system depends on the configuration and the
communication networks used. For a particular
configuration, you need to set the Java permissions of the
browser used to view the screen to enable unsigned
content to access all network addresses.
February 2004
Figure 2 shows a network where a screen communicates
with data servers running on all targets. Each data server
gathers data from resources located on their target, i.e.,
configurations, then relays it to the screen. However, for
this network configuration, you need to set the java
permissions of the browser used to view the screen to
enable unsigned content to access all network addresses.
This configuration offers the greatest performance due to
the direct communication between the data servers and
targets. For details on setting java permissions, see
page 2.
Choosing a Network Configuration
Screens are made up of HTML and have a Java applet
providing control and monitoring capabilities. The Java
applet communicates with one or more data servers
running either on the same or different platform.
Communication between applets and data servers is
event-based using a TCP/IP network. Whereas,
communication between data servers and targets is by
polling using either IXL, IXL on TCP/IP, or IXL on any
other supported network.
Figure 2: Screen with data servers running on all target computers.
When running HiBeam screens, you can set them up
using different network configurations. Figure 1 shows a
screen and data server running on a target. You can use
this configuration for simulation purposes with a virtual
target.
Figure 3 shows a network where a screen communicates
with a single data server which gathers data from all
target nodes then relays it to the screen. This
configuration offers good performance when targets
communicate using a high-efficiency network, e.g.,
targets using a network at 100 Mb/second.
Figure 1: Screen and data server running on a target.
Note: For a network configuration having only one data
server, in the screen’s project settings, you need to
specify the IP address of the default data server.
Whereas, for a configuration having more than one data
server, in the screen’s project settings, on the Data
Servers tab, you need to specify the IP addresses of each
data server.
Figure 3: Screen with data server running on one target computer.
© Copyright 2004: ICS Triplex ISaGRAF Inc. All rights reserved. No portion of this work may be
reproduced in any form or by any means, without the prior written permission of ICS Triplex ISaGRAF
Inc
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Using HiBeam Screens
Figure 4 shows a network where a screen communicates
with a single data server running on the same computer.
The data server gathers the variables data from resources
located on several targets then relays it to the screen. This
configuration offers the lowest performance due to the
repeated polling of each target through a TCP/IP
network.
permissions differs from one browser to another. For
information on setting the Java permissions of other
browsers, refer to the browser’s documentation.
To change the Java permissions for Internet
Explorer 5.0
1.
In Internet Explorer 5.0, from the Tools menu,
choose Internet Options.
2.
In the Internet Options window, select the Security
tab.
3.
In the Security level for this zone section, click
Custom Level.
4.
In the Security Settings window, locate the Java
permissions section, then select Custom.
The Java Custom Settings button appears at the
bottom of the window.
Figure 4: Screen and data server running on the same computer.
Setting the Java Permissions of
the Browser
When using a network where a screen communicates
with data servers running on separate targets, you need to
set the java permissions of the browser used to view the
screen to enable unsigned content to access all network
addresses. The product CD-ROM includes Microsoft’s
Internet Explorer 5.0 browser for use on the Windows
platform. You can use any other Java-technology
enabled browser. The procedure for setting Java
5.
Click Java Custom Settings.
6.
In the Internet window, select the Edit Permissions
tab.
7.
In the Unsigned Content permissions, set the
Access to all Network Addresses property to
enable.
8.
Accept all changes.
© Copyright 2004: ICS Triplex ISaGRAF Inc. All rights reserved. No portion of this work may be
reproduced in any form or by any means, without the prior written permission of ICS Triplex ISaGRAF
Inc
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