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Using HiBeam Screens Application Note www.icstriplexisagraf.com 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 1 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 2