Hey there! I need help with creating an expression for a "Go to Display" button in my HMI program that includes security measures. I want the button to direct users to Page_1 if their access level is 2, 3, or 99, and to Page_2 if not. Is there a way to achieve this using expressions without having to manipulate object visibility? Additionally, I'm looking for detailed documentation on expressions. Your assistance is greatly appreciated. Thank you, David.
A standard go to display button may not be sufficient for controlling the display on a PLC. If the PLC has some control over the current screen, you can handle it within the PLC. Otherwise, you may need to use two buttons with their visibility determined by an expression. Take advantage of the FTV help button in the dialog box to assist with creating your expression. You are on the right track!
Hi David, for your case, you could use a conditional expression. Something like this: "if $AccessLevel="2" or $AccessLevel="3" or $AccessLevel="99" then Page_1 else Page_2". You can attach this expression to your button click action. This way, based on the value of the $AccessLevel, it dynamically redirects users to either Page_1 or Page_2. As for documentation on expressions, I recommend checking out the HMI software manufacturers' website. They usually have a detailed help section or user manuals that explain how to construct and use expressions. Hope this helps!
Hi David, you may consider using the conditional operator in your expression. If you write it like `expression ? value_if_true : value_if_false`, you could create something that works like this: `(AccessLevel == 2 || AccessLevel == 3 || AccessLevel == 99) ? GoToPage('Page_1') : GoToPage('Page_2')`. It checks the user's access level and if it's either 2, 3, or 99, directs them to Page_1, else delivers them to Page_2. As for the documentation, I suggest checking out the official user guide or help files provided with your HMI software—it should contain detailed info about using expressions.
Hey David, you can accomplish this by using an expression in the "Go to Display" button configuration. For instance, something like: If(Access_Level=2 OR Access_Level=3 OR Access_Level=99, "Page_1", "Page_2"). This directs users with specific access levels to Page_1 and others to Page_2, as you'd requested. For a bit more resources on expressions, one tool I've found helpful is the software's built-in Help contents. You should be able to find a section dedicated to expressions with examples given. If you still need supplemental or more detailed resources, I'd recommend checking out online forums and software-specific communities where experienced users often share tips, tutorials, and documentations. Hope this helps!
Hi David! Absolutely, this can be done with an expression based on the user access level. You might consider using an inline if statement; if the user level is 2, 3, or 99, then go to Page_1, else go to Page_2. The exact syntax will depend on your specific HMI software, but it might look something like this: `if(UserLevel==2 || UserLevel==3 || UserLevel==99, "Page_1", "Page_2")`. As for finding more detailed documentation on expressions, it would be helpful if you could share which HMI software you're using. That way, we can guide you to specific docs or tutorials. Hope this helps!
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Answer: 1. How can I create a secure "Go to Display" button in View Studio ME using expressions? - You can achieve this by setting up an expression that directs users to a specific page based on their access level.
Answer: - Yes, you can use expressions to define the behavior of the button based on the user's access level.
Answer: - Yes, you can use expressions to control the navigation behavior of the button without altering object visibility settings.
Answer: - You can refer to the official documentation provided by the software manufacturer for comprehensive information on using expressions in View Studio ME.
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