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Figure 307
35.6.9 Dialog Page
HM4Web supports Dialog pages. You can show them and close them based on the ShowDialog and
CloseDialog macro actions. However Dialog pages are not movable.
35.6.10 User Management
HM4Web uses a login mechanism which will verify user credentials on the server. The user name and
password are based on the user credentials defined in User Management.
HM4Web does not support individual security settings applied to widgets or pages.
35.6.11 Maximum Concurrent User Connections
The web server in the HMI panel supports three (3) concurrent connections at a time. If you try to connect to
the server from more than 3 remote browsers, only the first 3 connections will be permitted.
35.7 Troubleshooting and FAQ
35.7.1 Enable JavaScript
HM4Web requires JavaScript to provide interactivity with the server and the user. HM4Web will not work if
JavaScript is disabled in your browser.
By default most browsers come with JavaScript enabled. But if you have disabled JavaScript in the past,
please re-enable JavaScript before accessing HM4Web pages.
35.7.2 Browser Cache
HM4Web include resources that change infrequently such as CSS files, image files and JavaScript files.
These resources take time to download over the network which increases the time it takes to load the
HM4Web page in your browser. Browser caching allows these resources to be saved by a browser and used
without requesting them each time to the server. This results in faster loading of HM4Web pages.
For optimal HM4Web performance, caching should be enabled in your browser. By default the browser
comes with caching enabled and you do not have to do anything with it unless the cache has been disabled.
Note that HM4Web pages will work properly with disabled browser caching, however resource loading time
will be slower compared with normal cached operations.
35.7.3 Using a Proxy
Some users may be accessing the HM4Web project through a proxy. The proxies may control the number of
parallel connection settings for the browser. If the proxy controls the parallel connection settings then make
sure that the maximum possible parallel connections (max connections) is set to a number greater than 5
and less than or equal to 10.
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