Schneider Electric DMOPC User Guide | Manualzz
...........DM OPC
Released September 2012
DMOPC, Overview
About DM OPC
How To: Set Up the DM OPC
About DM OPC User Interface
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DMOPC, Overview
About DM OPC
The concept of OPC (OLE for Process Control) is all about open connectivity in industrial automation. OPC standards are
specified and maintained by the OPC Foundation. For details see (last accessed September
2012). OPC includes 7 standards (active or planned) where OPC Data Access (OPC DA) is the original and first used to
exchange real-time data between SCADA systems and external applications/clients. OPC DA can be used for I/O communication, and is the most commonly used of the OPC protocols.
The principle of communication is that data is sent via defined attribute setpoints from either Aquis or Termis and then
sent to a DM OPC database. From there the DM OPC connects to the OPC Server and maps the required available data
tags and submits data to the SCADA system. Communication is event driven and there will be updates as soon as there
are changes.
For optimal performance you are recommended to use the OPC connection type to send data to a SCADA system
as the OPC is standard setup for most SCADA systems. The use of other connection types depends on what the
appropriate SCADA system supports.
Before your begin DM OPC configuration
Before you start the configuration of the DM OPC application you must ensure that you observe the following:
You have basic knowledge of OPC concepts.
DM OPC and OPC Server must be installed on the same machine.
OPC Server and SCADA (for example IGSS) must be properly configured and running when you start the DM OPC
DM OPC graphical overview
The illustration in the ensuing shows the data flow when you use DM OPC as the connection data type from either Aquis
or Termis, or the stand-alone Data Manager application.
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DMOPC, Overview
Explain modules and databases in the preceding figure…
The following table lists the modules and databases used for the DM OPC communication.
Module / Database
Master (Aquis or Termis) andIn-
As of version 5.0 of Aquis/Termis, Data Manager is an integrated part of the
tegrated Data Manager function
application. From Aquis or Termis, data is sent via setpoints to the DM
OPC database. The setpoints are configured in Aquis or Termis
For details on data services, you can download the documentation from the
corporate web site, or you can view the documentation provided with Aquis or
Through the use of the DM OPC application you can subscribe to SCADA tags.
A Microsoft Access database contains the DM OPC configuration.
OPC Server
The OPC Server is a SCADA application that allows the DM OPC to subscribe to
SCADA tags.
The OPC Server and the DM OPC application must be installed
on the same machine (as illustrated in the figure).
The OPC Server provides a list of tags that can be selected and assigned to a
tag name. You can edit this tag name if required for easy identification.
Your SCADA system provider must inform you of the appropriate OPC server name. Tag names are supplied with the OPC
In addition, to complete the OPC Server setup you must perform a proper configuration of the DCOM (Distributed COM) component. The DCOM is an integral security mechanism in the Windows operating system. It operates as a
network extension of the component object model (COM) technology that
enables interprocess communication across network.
If you use IGSS as your SCADA system you are referred to the documentation
provided with IGSS. You will find in-depth description of DCOM and OPC Server
configuration. For details see the online help named IGSS Interface Help.
Supervisory Control & Data Acquisition.
For details on DCOM
The OPC Foundation provides a number of white papers and articles (PDF format) in regards to DCOM security.
OPC and DCOM White Papers (Web site last visited September 2012)
Select Downloads then White Papers>, and point to either OPC, DCOM and Securit or OPC, DCOM and
Performance Issues.
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DMOPC, Overview
How To: Set Up the DM OPC
This topic provides guidelines for setting up the DM OPC to allow for the transfer of data between the DMOPC DB and
your preferred SCADA system.
For background information see About DM OPC, page 3.
The communication setup encompasses the following steps that are explained in the ensuing sections:
Create new DM OPC configuration database.
Connect to SCADA server. (This documentation uses IGSS as the sample SCADA system.)
Configure DM OPC
The DM OPC uses a Microsoft Access database to store both configuration and real-time state (data).
Open DM OPC.
If you installed to the default folder you can (in Vista) launch it from Start>All Programs>Schneider
Electric>DM OPC.
To create new database and connect to server
1. From the DM OPC menu bar select File, then New and locate the relevant Microsoft Access database.
2. From the menu bar select Server, then Connect and under the dialog Select Server point to the required
In the right-most pane you can see a list of all available objects.
3. Optional. If you want to rename one of the objects, such as for easier identification, right-click the appropriate
object and select Edit DM Name. Edit the Alias name as appropriate.
Any changes are now reflected in the SCADA system; this could for example be the open/close status of valves.
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DMOPC, Overview
About DM OPC User Interface
This topic provides an overview of the DM OPC user interface.
Explain DM OPC menu bar and right-click menu
Menu Contents
Menu Description
New configuration
Select this menu to create a new configuration. The configuration is stored in
a file with the extension .csv.
Open configuration
Select this menu to open an existing configuration (saved as a .csv file.
Import CSV
Use these menus to perform manual edits of large chunks of data.
Export CSV
Save changes and exit the application.
Establish a connection to an already running OPC Server.
Disconnect the connection to a running connection to an OPC Server.
View basic information on the data transmission activity.
About DM OPC
Displays the current software version of the DM OPC.
Explain DM OPC right-click menus…
Left pane
Menu Description
Select this menu to reestablish the connection to the required server.
Select this menu to cancel the connection to the server.
View Status
View the status of the server and additional information on the server, such
as vendor information, start time and current time, etc.
Right pane
Edit Group
Point to the required tag and perform edits on the group level. You can only
edit a few of the options, such as the name and the update rate.
Edit DM Name
Point to the required tag and change the alias name if you want a name that
is different and easier to identify than the default OPC name.
Remove Tag
Point to the tag you no longer need to remove it from the list of selected tags.
Remove All Tags
Remove all the previously selected tags.
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