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Connection problems with Simatic NET OPC server

Created by: adam_son at: 2/3/2009 9:14 AM (3 Replies)

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Problem description:

I’m using following hardware and software:

Hardware:

SIMATIC MICROBOX PC (industrial PC) with OPCServer.

PC where OPC client is running.

Software:

Industrial PC: windows XP Embedded SP2 , NETFramework 1.1 , SIMATIC NET (OPC SERVER)

PC : Windows XP SP3 ; VB application (using Netframework 3.5) made in VS2008Proffesional.

Two computers are in local network (connected by switch) , working in the same Workgroup.

I tested the local and remote communication using OPCScout (Siemens OPC client – SimaticNET component). It works correctly. I have access to variables in PLC.

So I’m suggesting that DCOM configuration on both machine are OK. DCOM was configured according specification (DCOM with the OPC servers for SimaticNET ).

Code sample:Option Explicit OnPublic Class Form1 Inherits System.Windows.Forms.Form Private MyOPCServer As OPCServer Private MyOPCGroup As OPCGroup Private ServerName As String Private GroupName As String Private ItemCount As Long Private ItemIds() As String Private Clienthandles() As Long Private Serverhandles() As Long Private Errors() As Long Private Values() As Long Private OPCCache As Short Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load MyOPCServer = New OPCServer End Sub Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button_Search.Click On Error GoTo ErrorHandler Dim LocalServer As Object LocalServer = MyOPCServer.GetOPCServers(TextBox1_MachineName.Text) Dim tmpServer For Each tmpServer In LocalServer Call ComboBox1_ServerList.Items.Add(tmpServer) Next Exit SubErrorHandler: MsgBox("Error!" & Err.Description & " Source:" & Err.Source & ". ErrNr:" & Err.Number & ". ErrHelpFile:" & Err.HelpFile & ". ErrHelpContext:" & Err.HelpContext)

End Sub

Private Sub Button_Connect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button_Connect.Click On Error GoTo ErrorHandler ServerName = ComboBox1_ServerList.Text Call MyOPCServer.Connect(ServerName) Button_AddGroup.Enabled = True Button_Disconnect.Enabled = True Exit SubErrorHandler: MsgBox("Error!" & Err.Description & " Source:" & Err.Source & ". ErrNr:" & Err.Number & ". ErrHelpFile:" & Err.HelpFile & ". ErrHelpContext:" & Err.HelpContext) 'Resume Next

End Sub

Problem is appearing when I want to use VB application. To communicate server and client I used the Automation Interface (SiemensOPCDAAutomation 2.0). First I’m using in VB application the function GetOPCServers. It works fine , I’m getting all available names of OPC servers on remote computer. Then I’m using function Connect and I get the following massages:

The RPC server is unavailable (Exception from HRESULT: 0x800706BA)

ErrNr: 462

Source: Interop.OPCSiemensDAAutomation.

Application also generates a file (SOPCDAAUTO_ERR) where there can be read following messages:

00000001	18:33:18,602	0D60	***	TRACEEVENT IS CREATED
00000002	18:33:18,602	0D60	***	TRACE IS INITIALIZED
00000003	18:33:18,602	0D60	->	DLL_PROCESS_ATTACH
00000004	18:33:18,602	0D60	<-	DLL_PROCESS_ATTACH
00000005	18:33:26,753	0D60	ERR	'gpOPC->GetClassDetails' OPCAutoServer::GetOPCServers, [hr2=0x80040154]
00000006	18:33:31,760	0D60	ERR	'CoCreateInstance' OPCAutoServer::Connect, [hr=0x800706BA] ProgID: 'OPC.SimaticNET'
00000007	18:56:14,210	0D60	->	DLL_PROCESS_DETACH
00000008	18:56:14,210	0D60	<-	DLL_PROCESS_DETACH
00000009	18:56:14,210	0D60	***	TRACEEVENT IS DELETED
00000010	18:56:14,210	0D60	***	TRACE IS UNINITIALIZED

I also found some message in Component Service-> Event Viewer-> System:

"DCOM was unable to communicate with the computer “NAME” using any of the configured protocol"
I checked the DCOM configuration (Default protocols)– the protocols on both computers are the same : Connection oriented TCP/IP.
Has anybody the same problem?

Last edited by: adam_son at: 2/3/2009 9:16 AM

2/3/2009 11:42 AM	Rate (0)
adam_son Posts: 4 Rating: (0)	Problemis solved. I instaled Simatic NET PC software on client machine and it start working. regards
adam_son Posts: 4 Rating: (0)
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2/3/2009 12:38 PM	Rate (0)
umencho Grandmaster-Expert Joined: 3/21/2006 Last visit: 1/10/2026 Posts: 10247 Rating: (1183)	Hello Thank you for feedback. regards

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2/6/2009 1:10 PM	Rate (0)
J_Bell Posts: 5822 Rating: (412)	Hello, I also thank you about your Feedback... even so I am a bit confused because I thought seen from you first post that you have the OPC Scout already installed on the DCOM Client... but well, as it runs now, great. Best regards J_Bell
J_Bell Posts: 5822 Rating: (412)
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Connection problems with Simatic NET OPC server

Created by: adam_son at: 2/3/2009 9:14 AM (3 Replies)

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Last edited by: adam_son at: 2/3/2009 9:16 AM

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Connection problems with Simatic NET OPC server

Created by: adam_son at: 2/3/2009 9:14 AM (3 Replies)

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adam_son

Last edited by: adam_son at: 2/3/2009 9:16 AM

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