I will need a little more info on the ‘cannot read temperature with another controller’ issue. If you can read the bacnet objects using T3000 → Bacnet Tool → Yabe then you should be able to read it with your Wago controller, assuming its all set up correctly: protocol, baud rate, cabling and so on. Be sure to connect with one device first, get that going first and build from there.
For the continually flashing Tstat7, you may have inadvertently interrupted the firmware update process at some point. You can recover the device by cycling power and flashing the firmware using the T3000 → tools → ‘ISPTool’ in the first few seconds after power up. You can see more info here: