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.
Card Speed:
Select needed Baud rate(in the range from 1200 to 115200 bps) from the list
Filter:
-"Directed BACnet NPDU only" - to receive only directed or Broadcast NPDU. (accepted by any BACstac version). MS/TP information is absent.
Node Address:
Set address of this node in the range [0-254]. IMPORTANT Note: Master node must be in the range [0-Max_master]
Node Type:
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.
Max_info_frames[1-10]:
Leave at default settings.
Max_master[1-127]:
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.