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UEIPAC HMI. Overview. The UEIPAC is an embedded Linux based system without any graphical interface. It is very good at network connectivity which makes it possible to create remote graphical user interfaces (also known as HMI Human-Machine-Interface). Client-Server. - PowerPoint PPT Presentation
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© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
UEIPAC HMI
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
OverviewThe UEIPAC is an embedded Linux based system
without any graphical interface.
It is very good at network connectivity which makes it possible to create remote graphical user interfaces (also known as HMI Human-Machine-Interface).
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
Client-Server• Server typically runs on UEIPAC.
• Example: server acquires data and publishes it for remote display(s)
• One or more client can connect to a server• A HMI client written in C# can display data
acquired on UEIPAC in a chart• A client can subscribe to variable updates
• The client gets notified only when variable value change exceeds a given deadband
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
LibSharedData• The shared data protocol is implemented in a
shared library• Linux: libshareddata.so• Windows: UeiSharedData.dll
• Both server and client(s) use the same shared library to communicate.
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
UEIPAC
Application #1server
LibSharedData
UEIPAC
Applicationclient
LibSharedData
Application #2client
PC #2
Applicationclient
LibSharedData
PC #1
Web browser
LibSharedData
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
LibSharedData 1/2 Implements a simple message based
protocol (set/get variable) using JSON or binary data representation
Local processes communicate over UNIX sockets
Remote processes communicate over TCP/IP sockets
Web browser communicate using Web Sockets
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
LibSharedData 2/2Variables are simply designated using a unique
nameVariable type can be a scalar or array of :
Int32 Int16 Int8 Double Float
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
Protocol 1/3Client or server sends a request to libshareddata
put_value <name>=<value> put_value_json <name>=<value> get_value <name> get_value_json <name> subscribe_value <name> Etc..
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
Protocol 2/3Libshareddata implements a C API that hides the
protocol away
Bindings are available for C#, VB.NET, LabVIEW and Python
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
Protocol 3/3Web browsers can directly connect to remote
processes using web sockets and a little bit of javascript programming.
Data can be displayed using standard HTML controls or more advanced HTML5 ones
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
UEIPAC server exampleCreate Server:UeiSharedDataCreate("tcp://192.168.100.2:2345", &handle);
Acquire voltages:DqAdv207Read(hd, devn, clsize, cl, NULL, fdata);
Publish voltages:UeiSharedDataPut(handle, “voltages",
UeiSharedDataTypeDbl, clsize, fdata);
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
Share Data Client Shared Data client is an application that
provides a quick way to test a server.
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
C# clientCreate a client objectUeiSharedDataClient client = new UeiSharedDataClient();
Open communication with serverclient.Open("tcp://192.168.100.2:2345");
Get shared variable valuedouble[] voltages = client.GetDouble(“voltages", 16);
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
C# client
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
LabVIEW clientCall VIs to open communication with server and
read “voltages” variable values
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
LabVIEW client
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
HTML5 client Web sockets are part of HTML5. Supported in
the following browsers: Google Chrome (fastest javascript engine) Firefox Safari for MacOS and iOS Android web browser Internet Explorer 10
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
HTML5 client There are many HTML5 UI library out there. Most
are business oriented, but are usable for industrial applications
Jquery UI library provides a very easy way to manipulate UI elements of a web page
UEIPAC comes with a default web page to view shared data: http://192.168.100.2:2345/shareddata.html
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
HTML5 client
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com
SVG lab (still experimental)A set of HTML5 UI controls for web based
scientific and industrial applicationsUses SVG (Scalable Vector Graphics) for
drawing Use javascript for programming.
Chart Slider Maybe more...
© 2010 UEI, Inc. All Rights Reservedwww.UEIDAQ.com