I understood your question like this:
There are 9 visualization pages (e.g. visu1,..., visu9) in one PLC project
There are 9 WR21, which should display automatically different pages when starting. You don't want to select the page manually. 1. WR21 should display visu1 2. WR21 should display visu2 : : 9. WR21 should display visu9
I found the following in the CoDeSys Docu: Chapter: Configuring and starting a display variant
You just add multiple "WebVisu" objects to the PLC project, where you can define different start pages. I attache a example project with 2 "WebVisu" objects. URL's of example project.
http://<IP-of-ctrlX>:8080/webvisu-a.htm
http://<IP-of-ctrlX>:8080/webvisu-b.htm
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