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List Boxes and Strings

Created by: masmith1553 at: 9/22/2014 10:31 PM (4 Replies)

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9/22/2014 10:31 PM	Rate (0)
masmith1553 Experienced Member Joined: 12/13/2011 Last visit: 4/19/2023 Posts: 123 Rating: (14)	Hello, I am trying to replace our current HMI with WinCC in TIA Portal V12. One of the screens we currently use is a display of list boxes that contain information about valves (i.e. the valve name). We currently fill the list box with a FOR loop using indirect tags. I have not been able to find a way to display an array of strings into a list box. I have created a DB in a S7 1500 PLC which contains 120 structures that contain several strings. Is there a way to use a FOR loop in the VB scripts to display the strings? Sub OnGenerateScreen() Dim i Int For i = 1 To 120 Do SmartTag("list_box1") = Set ("ValveStucture".Valve[i]."Valve Name"); End For; End Sub

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9/23/2014 7:31 AM	Rate (0)
K!ke Posts: 1299 Rating: (136)	Hello, here you can find a sample project about dynamization of the list boxes: http://support.automation.siemens.com/WW/view/en/57025748 K!ke
K!ke Posts: 1299 Rating: (136)
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10/1/2014 3:23 PM	Rate (0)
masmith1553 Experienced Member Joined: 12/13/2011 Last visit: 4/19/2023 Posts: 123 Rating: (14)	I was able to fill the list box using the following: Dim i, listbox1, tag Set listbox1 = ScreenItems("ListBoxValveName") For i = 1 To 120 tag = "ValveName"&i&"" listbox1.SelectedIndex = i Set listbox1.SelectedText = SmartTags.Item(tag) Next Where I create a HMI tag ValveName"#" with a PLC connection to the structure in the DB. So my next question is how would I create a structure in the HMI tags to match the structure in the DB?

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10/2/2014 12:05 PM	Rate (0)
K!ke Posts: 1299 Rating: (136)	Hello, which datatype do you use in plc? an array with all names or aplc udt for each valve? K!Ke
K!ke Posts: 1299 Rating: (136)
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10/2/2014 10:38 PM	Rate (0)
masmith1553 Experienced Member Joined: 12/13/2011 Last visit: 4/19/2023 Posts: 123 Rating: (14)	I created a PLC data type "Valve" in the PLC which conatins strings, integers, and bools. Then I created a DB with an array of the data type "Valve". Attachment valvestruct.JPG (342 Downloads)

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