Scan Bus Menu - Metasys - LIT-12012443 - Software Application - MS-FIT100-0 Field Inspection Tool

MS-FIT100-0 Field Inspection Tool User Guide

Product name
MS-FIT100-0 Field Inspection Tool
Document type
User Guide
Document number
LIT-12012443
Revision date
2019-09-11

The Scan Bus mode is used to initiate, monitor, and interrogate controllers on the FC/SA bus. In this mode, the FIT communicates with the controllers to read their attributes. The Scan Bus mode is used when there are communications occurring on the bus or if there are no communications occurring. If no communication is occurring, do not initiate the Scan Bus mode until you verify that the idle bus voltage readings are at their desired levels on each bus segment. See Idle Bus Voltage Levels and the Voltage Menu section for more information. Selecting Scan Bus initiates communications to all devices on the bus. A correctly installed bus scan completes within a couple of minutes.

In the Scan Bus mode, the FIT monitors communications and interrogates controllers to report:

  • The number of devices online
  • The address of each device online
  • The communication bus voltage levels of the device
  • Status of EOL termination switch on the device
  • Model
  • Vendor
Figure 1. Scan Bus Menu

Note: Use Expert mode instead of Install mode when you need to read a greater number of attributes from each device. The FIT defaults to Install mode to make user operation easier. The User Mode can be changed from Install to Expert under the System Menu. See System Menu for more information. Using the Expert Mode communication is slower when a large amount of information is being transmitted and received. For Johnson Controls manufactured equipment, Model and Vendor data are displayed.

For a complete list of all attributes, and modes see the FIT Display Table . See Network Communication Voltage Levels for more information on bus voltage levels.