Cannot Complete Request - Multipacket Change

What does F008 mean?

This fault indicates that a multi-packet communication request could not be completed because the situation or state of the target device changed during the transfer. This often occurs with operations requiring consistent state across multiple packets.

• Target device entered a different mode or state during a multi-packet message.
• Network interruption or timeout during a multi-packet transfer.
• Competing commands causing a state change on the target.

Click steps to track your progress.

1. 1

   Inspect all physical communication cabling and connectors between the Logix/SLC PLC and the target device for damage, proper seating, and shielding integrity.

2. 2

   Verify the stability of power supplies to both the Logix/SLC PLC and the target device, checking for intermittent voltage drops or fluctuations.

3. 3

   Check the operational status indicators, internal diagnostics, and event logs of the target device for any unexpected resets, power cycles, or state changes.

4. 4

   Review the communication configuration parameters within the PLC program (e.g., MSG instruction settings, timeout values) to ensure they are adequately tuned for the network environment and target device response.

5. 5

   Monitor the PLC processor utilization and scan time to confirm sufficient processing resources are available for consistent communication execution.