issue with strings / Allen Bradley

[danm]

Hello, very new here just downloaded and began playing with this.  I am sure it is something simple but I can not get strings to display using 'basic labels'.  I am connected to an Allen Bradley PLC (control logix) and able to display Booleans and number values but text/strings show nothing? I use KEPWareEX 6 also and can see the tags do have a value by using their client.  I get no errors or "Path Destination Unknown" just no display in the label?
Thank You

[Archie]

Path Destination Unknown is an error that comes back from the PLC saying the tag either does not exist or does not have external access rights.

Are they standard strings or Custom Length? Custom Length will not display in a BasicLabel

[danm]

Hello
  Thanks for the quick response!  I ma not a PLC programmer, I code around them.  I believe they would be considered custom length as they are  defined as "String (char limit 82)" in the documentation I was given.  The format is shown as "ROBOT1LINEABUILD.PRODUCTIONORDERID.DATA/82". I have tried putting it in as "ROBOT1LINEABUILD.PRODUCTIONORDERID.DATA", "ROBOT1LINEABUILD.PRODUCTIONORDERID" and "ROBOT1LINEABUILD.PRODUCTIONORDERID.DATA(82)"  The non strings are displaying fine.  What is the format needed and what control is best to display these inside?  Is there any downloadable help files/system?

[Archie]

Based on the tag name you gave, I am guessing you are using program scope tags as opposed to controller scope. The program scope tags need to be preceded by PROGRAM:

There is a little bit of documentation on it here:

https://advancedhmi.com/documentation/index.php/EthernetIPforCLXCom

I would say try:

PROGRAM:ROBOT1LINEABUILD.PRODUCTIONORDERID

[danm]

Again Thank you for the fast response!  I was able to call up our PLC coder and he says they are "Program Scoped" tags. He also said the strings are just 'standard AB strings". I added "Program:" as suggested and the label shows "Path Segment Error (Invald Tag Name)".  I did some searching and found a old code snippet that loops through the tags (posted below) but only shows the 'upper level' tags ('Robot1LineABuild').  Is there a similar snippet that can show all 'levels' of the tags ('Robot1LineABuild.PRODUCTIONORDERID') and help me identify the correct tag name?

Code: [Select]

        Dim t() As MfgControl.AdvancedHMI.Drivers.CLXTag
        t = EthernetIPforCLXCom1.GetTagList(60000)
        Using sw As New System.IO.StreamWriter(".\TagList.txt")
            For i = 0 To t.Length - 1
                sw.WriteLine(t(i).TagName)
            Next
        End Using

[Archie]

If it shows Robot1LineABuild, that means the strings are inside a UDT named Robot1LineABuild. You will need the program name in which the tags exist.

[Godra]

Would a tag browser help here:

   https://www.advancedhmi.com/forum/index.php?topic=2835.0
   https://www.advancedhmi.com/forum/index.php?topic=2850.0

[danm]

  I tried to compile the CLXTagList_ComboBox and CLXTagList_TreeView they both create errors "'ArrayElements1' is not a member of 'CLXTag'" and repeat for ArrayElements2/3? I also get a error "'UDTStructure' is not a member of 'CLXTag'"? I downloaded "AdvancedHMIv399xR1.zip" from the site here and have only made changes to it as instructed. I placed them under the AdvancedHMIControls/Controls and did a 'clean solution' followed by 'rebuild solution' using Visual Studio 2022 Enterprise ver 17.3.2
  I also found while searching reference to "ReadUDT" (https://advancedhmi.com/documentation/index.php/ReadUDT) and tried using it but it returns "'ReadUDT' is not a member of 'EthernetIPforCLXCom1'"?
  My end goal is to be able to display some of the factory data live using a projector/large screen connected to a PC

Code: [Select]

Private Sub BasicButton3_Click(sender As Object, e As EventArgs) Handles BasicButton3.Click
        Dim MyStructureInstance As CDS
        MyStructureInstance = EthernetIPforCLXCom1.ReadUDT(Of CDS)("Robot1LineABUILD", 1)
    End Sub

    Public Class CDS 'Common Data Structure
        Public PTS_PalletID As Int32
        Public PTS_ProductionOrderID As String
        Public PTS_InternalOrderID As String
        Public PTS_ItemNumber As String
        Public PTS_ItemName As String
        Public PTS_LotCode As String
        Public PTS_ItemGroup As String
        Public PTS_Barcode As String
        Public PTS_CasesPerPallet As Int32
        Public PTS_ProductType As String
        Public PTS_Quarantine As Boolean
        Public PTS_QuarantineOrderID As String
        Public PTS_TimeStamp As String
        Public PTS_PartialCaseCount As Int32
        Public PTS_Partial As Boolean
        Public PTS_MoverClassification As String
        Public PTS_ReservedSalesOrderID As String
        Public PTS_Destination As String
        Public PTS_Location As String
        Public PTS_State As String
        Public PTS_Notes As String
        Public STP_PalletID As String
        Public STP_Destination As String
        Public STP_ACK As Boolean
        Public STP_NACK As Boolean
    End Class


[Archie]

I updated the tag browser to Beta 38 and posted the full source:

https://www.advancedhmi.com/downloads/AdvancedHMIv35TagBrowser399y38.zip

[danm]

Thank You!! That tag browser works wonderfully.  I found the tag needed for my example.  What would be the correct syntax to use in the 'PLCAddressValue' field to display it? I tried "Robot1LineABUILD(Pallet_Data)PALLETID.data","Robot1LineABUILD("Pallet_Data")PALLETID.data","Robot1LineABUILD.Pallet_Data.PALLETID.data" also the same without the '.data' suffix.

[Archie]

What is the program the tag resides in (assuming it is a Program Scope tag)?

[bachphi]

from his screenshot, it's not program scope tags.

 'PLCAddressValue' = Robot1LineABUILD.PALLETID

[Godra]

Not really sure if this is critical but do pay attention to the upper / lower case letters, so the tag should be Robot1LineABuild.PalletID - exactly as the Tag Browser shows them - and if DATA is to be used then add it as such: Robot1LineABuild.PalletID.DATA.