visual-devel

[Visual-devel] Fwd: Re: Dear Mr. Thomas Hergenhahn,

[Thomas H. <Tho...@we...>]

"Thomas Hergenhahn" <Tho...@we...> schrieb am 10.05.04 11:46:00:


"Can Cui" <cac...@fh...> schrieb am 10.05.04 01:47:06: 
>  
> Dear Mr. Thomas Hergenhahn, 
>  
> When we click the menanisa picture on the right site"(hmiTool.class) of 
> "Design.html, the picutre will not appear on the left site of it 
> (hmiDesigner.class). We thought it could be the problem of hmiMultiIcon, 
> but it turned out to be all right. So we just wrote the HTML code for 
> displaying picture to complete the HMI page of our application. 
Ok, I got reports about this problem earlier, but I did not think it was this you 
meant, because the designer is already far from functional (I hope to release a mostly 
funtional one, not web based, but as a JAVA application, this week). 
Problems occured for two reasons: 
1.) depending on the browser or better, tthe JAVA implementation used by it, two 
Applets running in the same page do or do not share the same CodeBase in class 
AppletStub or AppletContext. 
2.) The size of the displayed imgage is not identical to the configured size of 
hmiMultiIcon (the image is always shown in real size regardles what width and height 
hmiMulticon has). Here, the active area (where it reacts on clicks) was only a small 
area (about one third) in the upper left corner. This  was my fault when setting up the 
page: -( 
 
Thomas  

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[Visual-devel] Fwd: Re: Dear Mr. Thomas Hergenhahn,

[Thomas H. <Tho...@we...>]

"Thomas Hergenhahn" <Tho...@we...> schrieb am 12.05.04 00:01:0=
4:


"Can Cui" <cac...@fh...> schrieb am 11.05.04 22:53:11:=20
> =20
> Dear Mr. Thomas Hergenhahn,=20
> =20
> In your former email, you said these about how to send commands from=20
> client to the server:=20
> =20
> >> how do we send operation commands from the client to the=20
> >>server. The connection between client and server has already been set =
up.=20
> >=20
> > The client (HMI page) sends commands to the server, which will update=20
> > values in the=20
> > spreadsheet. You can watch the changes in the spreadsheet editor direc=
tly.=20
> >=20
> =20
> Would you please explin this in detail=3F For example, if we want to send=20
> commands to the server, which function, class are we going to use=3F=20
> =20
Again, I=B4m not quite sure what you want to do.=20
Using VISUAL as mainly intended (hmi and server together), any page will h=
ave the line:=20
<param name=3D"communicator" value=3D"hmiVisualCI">=20
or, in the newer version:=20
<param name=3D"communicator" value=3D"org.visual.hmi.protocol.hmiVisualCI">=20
All your widgets put their variable names int a hashtable held by hmiViewe=
r Applet.=20
hmiViewer passes them to the communication interface.=20
hmiVisualCI will issue a request like the following to VISUAL=B4s server:=20
"getlist A1,A2,B9,H111,G7,2:F3<lf>"=20
The server would respond with something like:=20
A1=3D1.0<lf>=20
A2=3D8.222<lf>=20
B9=3D1.122<lf>=20
H111=3D12.1<lf>=20
G7 =3D=3F=3F=3F<lf>  // assumed this cell doesn=B4t exist=20
2:F3=3D8.444<lf>=20
end of list<lf>=20
=20
If you include a widget that can change values, e.g. a potentiometer, then=
, if the user=20
changes its position clicking it, the potentiometer will call hmiViewers p=
utVal()=20
method, e.g. putVal(Q13,17.0). hmiViewer passes this to hmiVisualCI=B4s putV=
al method,=20
which will issue a call to the server:=20
set Q13=3D17.0<lf>=20
The server should responds with:=20
ok<lf>=20
=20
There are some more commands in the protocol:=20
From hmi pages, these are also used:=20
sheet=3D[number] sets the standard spreadsheet after connecting.=20
tset [col][row]=3D1<lf> sets a variable to 1, which will then be reset to 0 =
after=20
delivering it to the PLC. This is for pushbuttons, see better explanations=
 in=20
hmiVisualCI.java or the server source or in plcdrv.cc=20
savesettings<lf> instructs the server to save all values changed by hmi pa=
ges into=20
files to save settings permanently. (so they are still present after serve=
r restart)=20
=20
There are other commands the server can understand, which are used to disp=
lay/edit a=20
spreadsheet remotely. I also may have forgotten something here :-)=20
=20
If you view the spreadsheet, you could watch how the value of Q17 changes =
in above=20
example.=20
You could also change values manually and see how they are propagated to t=
he hmi page=20
in the next refresh cycle.=20
=20
You can test the server with some Perl scripts coming with VISUAL, servert=
est.pl and=20
any other file named like s*test.pl. You can modify these scripts to test =
just what you=20
like or what variables exist in your spreadsheets.=20
=20
Thomas=20
=20
=20

=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
... and the winner is... WEB.DE FreeMail! - Deutschlands beste E-Mail
ist zum 39. Mal Testsieger (PC Praxis 03/04) http://f.web.de/=3Fmc=3D021191