Scanner Not Available to 1771 Rack Adapter

What does F016 mean?

This fault occurs when the communication scanner is unable to establish or maintain communication with a 1771 rack adapter. This prevents I/O modules in the 1771 rack from being read or written to.

• Physical disconnection of the scanner from the 1771 rack adapter.
• 1771 rack adapter power failure or hardware fault.
• Incorrect configuration of the scanner or adapter module.

Click steps to track your progress.

1. 1

   Verify power supply voltage to the 1771 rack adapter and the 1771 I/O rack backplane against specified nominal values.

2. 2

   Inspect all communication cabling between the communication scanner module and the 1771 rack adapter for damage, proper termination, and secure connections.

3. 3

   Check status indicators (e.g., COM, OK, FAULT LEDs) on both the communication scanner module and the 1771 rack adapter for diagnostic information.

4. 4

   Verify the communication parameters and addressing configured in the PLC's scanner module match the physical DIP switch settings or configuration of the 1771 rack adapter.