The 1-ON-1 mode is used to test a single controller that is disconnected from the network with the FIT connected to the FC Bus. In the 1-ON-1 mode, the FIT supplies the proper EOL termination to test the communications of the device. In the 1-ON-1 mode, all of the attributes of the controller can also be read, such as Model name, Firmware revision, EOL termination switch, and other attributes. The 1-ON-1 mode is used to verify the operation of any single controller that does not communicate on the bus. It is used to help determine if a Johnson Controls manufactured controller is defective.
The FIT only validates MS/TP controllers and devices that are hardwired to a FC/SA Bus. Wireless devices are not currently supported other than the 1-ON-1 mode at the controller’s SAB port.