Request Is Redundant

What does F00D mean?

This error indicates that the system received a request that is identical to a previously received or currently active request. The device determines the operation is already in progress or has been completed, thus marking the new request as redundant.

• Repeated command sent unnecessarily by the source system.
• Previous request still being processed by the target device.
• Incorrect logic causing a loop of identical requests.

Click steps to track your progress.

1. 1

   Inspect the PLC program logic associated with the redundant request (e.g., output bits, handshake signals) to verify proper interlocking and status checking prevents re-sending before completion or status update.

2. 2

   Verify communication parameters and the physical connections between the PLC and the target device receiving the request (e.g., network settings, cable integrity, communication module status indicators).

3. 3

   Monitor the status feedback signals from the target device in the PLC programming software to confirm they are updating correctly and accurately reflect the completion or active state of the request.

4. 4

   Check the target device's internal status, fault logs, or operational parameters (if accessible) for any indications of why it might consider the incoming request redundant or if it is stuck in an active state.

5. 5

   Verify any timing parameters within the PLC logic that govern the request trigger to ensure sufficient time for the target device to process and acknowledge the command before a new request is initiated.