Configuring a Fibaro Motion Sensor

With the shortage of Insteon products I figured I would try out Z-Wave.  I broke down and upgraded to Isy ver 5.3, bought the new Z-Wave 500 board ver. 6.82.01 and set it up.  Seems to work.  I purchase a Fibaro Motion Sensor per @lilyoyo1suggestion.  So now I am trying to configure it.

note: "Query" and "Write Changes" appear under the settings.  I just moved up in picture above to save space.

So for configuration I have a "Set Configuration", "Parameter Number", "Parameter Vales", "Write Changes.  I want to write 900 to parameter 64.  The manual says 2 bytes.  It doesn't say "unsigned" or "signed" which is a option.  Being battery operated I have to open communication by pressing button B once.    So now what order do I click on the buttons to write to the device.  How can I verify this change was successful?  Is there an App or something I can use to program this or read the configuration?  I am not using a Z-Wave hub just the Isy.  Next I want to put 300 in parameter 42.