Show Posts
1
Support Questions / AdvHMI controls are not being updated on OpcDaCom driver, soft ver 3.97a
« on: January 15, 2015, 05:35:18 PM »
Bug report
Tools:
for application development I am using: RSLogix Emulate 5000 to emulate PLC, RSLinx Classic as OPC server and wanted to try AdvancedHMI v3.97a.
Bug:
I open a new basic AdvancedHMI project, add communication driver OPCDaCom and set its all neccessary parameters then add any HMI controls like BasicLabel for example and set a PLCAddressValue and build and run application. Main Forms opens but the BasicLabel is not updated with the PLC read value, nothing happens, no any faults. I try the previous version 3.7 of AdvancedHMI and follow the same pattern. Result: works great, I try the newest relase v3.97c and the same: no updates, nothing happends on the screen.
Some troubleshooting:
When this happends I can see in RSLinx Classic: OPC Group Diagnosctics that groups are added properly and Subscription Packets are flowing. Also Active DDE/OPC Topic/Item List shows that desired tag is being read from a PLC. So subscriptions work there is sth wrong with callbacks
Possible root cause:
After studing the code for a little I have found the following conditional in SubscriptionHandler.vb in SubscibedDataReturned sub
the second part of the last conditional compares two strings but when using OpcDaCom driver the address variable is in the form:
address=PLCtag
while e.PlcAddress=[OPCTopic]PLCtag what may cause the problem
so even when everything os OK the condition fails and the control is never updated on the screen. When I change the condition everything works, controls are updated but this is not a solution for the problem
Best Regards
Tools:
for application development I am using: RSLogix Emulate 5000 to emulate PLC, RSLinx Classic as OPC server and wanted to try AdvancedHMI v3.97a.
Bug:
I open a new basic AdvancedHMI project, add communication driver OPCDaCom and set its all neccessary parameters then add any HMI controls like BasicLabel for example and set a PLCAddressValue and build and run application. Main Forms opens but the BasicLabel is not updated with the PLC read value, nothing happens, no any faults. I try the previous version 3.7 of AdvancedHMI and follow the same pattern. Result: works great, I try the newest relase v3.97c and the same: no updates, nothing happends on the screen.
Some troubleshooting:
When this happends I can see in RSLinx Classic: OPC Group Diagnosctics that groups are added properly and Subscription Packets are flowing. Also Active DDE/OPC Topic/Item List shows that desired tag is being read from a PLC. So subscriptions work there is sth wrong with callbacks
Possible root cause:
After studing the code for a little I have found the following conditional in SubscriptionHandler.vb in SubscibedDataReturned sub
Code: [Select]
Private Sub SubscribedDataReturned(ByVal sender As Object, ByVal e As MfgControl.AdvancedHMI.Drivers.Common.PlcComEventArgs)
For Each Subscript In SubscriptionList
Dim address As String = Subscript.PLCAddress
If Subscript.Invert Then
address = Subscript.PLCAddress.Substring(4)
End If
If (e.PlcAddress Is Nothing) OrElse (String.Compare(address, e.PlcAddress, True) = 0) Then
[and so on until control update]the second part of the last conditional compares two strings but when using OpcDaCom driver the address variable is in the form:
address=PLCtag
while e.PlcAddress=[OPCTopic]PLCtag what may cause the problem
so even when everything os OK the condition fails and the control is never updated on the screen. When I change the condition everything works, controls are updated but this is not a solution for the problem
Best Regards