Processor Downloading, Not Accessible

What does B000 mean?

This fault occurs when the target processor is undergoing a program download, making it temporarily inaccessible for other operations or communications. During a download, the processor's resources are dedicated to the update, preventing external access.

• Another user or process initiated a program download to the processor.
• System is performing a firmware update on the processor.
• Network congestion interfering with download completion.

Click steps to track your progress.

1. 1

   Verify if an authorized program download operation is currently active or recently initiated from any connected programming workstation or HMI.

2. 2

   Inspect the PLC processor's status indicator LEDs (e.g., RUN, FAULT, COMM, PROG) for patterns consistent with a program download or busy state.

3. 3

   Attempt to establish communication with the PLC using the appropriate programming software (e.g., Studio 5000 Logix Designer or RSLogix 500) to determine the exact processor mode and download progress.

4. 4

   Check for any communication disruptions or network issues that might be prolonging or interrupting a download process, leading to a 'not accessible' state.