We have established communication with Wonderware over NETDDE.
In Cimplicity, a device has been made with the Trusted Share in the topic, application is \\(correct_nodename)\ndde$.

Communication tests ok.

BUT I recieve this error: item TEMP expect data type FLOATING receive data type PTT_DOUBLE & item TEMP expect data len 4 receive data len 8

Excell reads the temperature fine. Why it seems to be sending 4 words, I have no idea.

Anybody got an idea?

Thanks in advance.

 

sorry, i should have included that those error messages appear both in the netdde dos troubleshooter and in cimplicity's cor stat log.

 

There are so many ways this could be screwed up, I hardly know where to start. Check out the tools at this site: <a href=http://www.angelfire.com/biz/rhaminisys/>RHA Mini Systems</a>. (demo use is free and that's pretty much all you might need until you start writing VB software...)

They sell DDE related software and it helps for link diagnostics quite a bit...

 

Moin Mr. Perry,
to me it looks like a wrong data type for the tag. 4 Byte floating point (float) instead of 8 Byte floating point (double.) And for the data length I would read Bytes instead of words.

Friedrich Haase
email [email protected]