I emailed about this a while ago-- It's more of a nuisance than a "broken thing", but here's what happens: This is on Mango 3.6.5,. running on ARM
(1) I verify operation of a New Device using the MODBUS TOOLS in Mango- Polling stuff to make sure it works.
(2) Then I go through, and configure points. This usually starts with me importing a Template file that has the names and such, and then I go through and use the edit buttons to change the Offset as necessary.
(3) It used to be that when the little enable slider was set, the system would poll, and off you go.
Now, it doesn't seem to do that. When I enable the slider, it just sites there saying "No Value"
Restarting the data source doesn't fix it either. I seem to have to restart Mango in order to get this to work, at which point it comes up fine.
This Data Source is attached via a Serial to USB adapter. I have (3) devices on this little RS-485 segment. One of them is a power meter, and it always seems to be fine. The other two are inverters. They all work via Modbus Tools, but it seems there's something strange about adding/editing points and then enabling them.
This is a sort of a pain when I set up net devices, as this behavior seems to exist whenever you turn the thing off and on again.. Ie, if I make a change to a point, and it saves and updates, that point doesn't start polling again.