A: The U+4 hardware is an intelligent USB to fieldbus interface. This allows you to use your PC's USB port to connect to an MSTP (RS485) network. The U+4 (along with a BACnet client like the Cimetrics BACnet Explorer) can now communicate with a BACnet/MSTP network to write and read values.
The following needs to be done for a connection;
- In your LAN properties, select your NIC interface and get into Properties | uncheck the Cimetrics BACstac protocol
- Install the driver for the U+4 on your PC
- Plug the device into your PC (In the USB port).Once the U+4 is plugged into the PC in the USB slot, this will add an extra Local Area Connection in your Network Places that corresponds to the U+4. In order to configure settings, you would need to select this Local Area Connection.
Once you are in the Local Area Connection, RT Click | Properties |Configure | Advanced, you will see all the options given below. Please configure according to your use.
Select needed Baud rate(in the range from 1200 to 115200 bps) from the list
-"Directed BACnet NPDU only" - to receive only directed or Broadcast NPDU. (accepted by any BACstac version). MS/TP information is absent.
Set address of this node in the range [0-254]. IMPORTANT Note: Master node must be in the range [0-Max_master]
Select "Master Node".
Master Mode takes part in token passing and is needed for the BACstac. In this mode, you would be able to completely discover the MS/TP network by using the BACnet Explorer.
Leave at default settings.
Leave this at the default settings.
Once the above settings are done, you should be able to start the BACnet Explorer and discover devices from a BACnet/MSTP network.