*NOTE* To increase exposure, this message is a duplicate of one just posted on the Lookout board.
Hello,
I am programming a LabVIEW application that need to write REAL4 numbers into GE Series 90 PLC holding registers. Looking at the documentation for the OPC driver, and regarding the numeric holding registers, I see that one can only write %R, %RD, and %RU (but not %RF).
Since I am using LabVIEW, I am forced to use DataSocket to read/write the OPC values. It seems I should be able to cast my SGL number as a U32 and write it to a %RU address. However, when I try this (e.g %RU702), I find that the higher-order word (e.g. %RU703) DOES NOT CHANGE, even though the lower-order word does in fact get updated properly.
Does anyone have a suggestion on how I can get a REAL4 written from LabVIEW to this PLC?
Thanks!
David Moerman
TruView Technology Integration Ltd.
