DMDDE start up

We are using ifix 3.5 and I have a spreadsheet I am using to publish some data I am gathering off of a couple SCADA nodes.

Every data change is causing a memory increase in excel and I am able to reduce the impact by slowing the refresh down in the dde window

However I hae found no way of starting dmdde with a refresh of X seconds.
does anyone know of a command line option to set a refresh rate automatically, instead of the 2 second default?

Thanks