25249

Network: user fault 1

Lenze · i550 Protec Drive

What does 25249 mean?

This fault indicates that the 'Activate fault 1' function has been triggered via the NetWordIN1 data word. The activation signal was detected within the NetWordIN1 data word 0x4008:001 (P590.01). This fault type typically results in the motor being brought to a standstill.

Common Causes

  • The network master (e.g., PLC) is setting the 'Activate fault 1' bit within NetWordIN1 (Parameter 0x4008:001 (P590.01)) erroneously.
  • Logical fault in the PLC or network master program, causing an incorrect value to be written to NetWordIN1.
  • Communication issues on the industrial network, leading to corrupted or incorrect data in NetWordIN1.
  • Parameter 0x4008:001 (P590.01) is mapped to a process value that has exceeded its configured threshold, triggering the fault.
  • Malfunctioning network interface card or module on the drive, misinterpreting network data.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Use network diagnostic tools (e.g., Wireshark, PLC diagnostics) to monitor the exact value of NetWordIN1 (Parameter 0x4008:001 (P590.01)) from the master.

  2. 2

    Examine the network master's program logic (e.g., PLC code) for the conditions that cause the 'Activate fault 1' bit in NetWordIN1 to be set.

  3. 3

    Inspect the network cabling (e.g., Ethernet, Profibus) and connectors for physical damage or loose connections.

  4. 4

    Verify the network communication parameters (e.g., IP address, baud rate, node ID) on both the drive and the network master.

  5. 5

    Temporarily disable the 'Activate fault 1' function linkage to NetWordIN1 in the drive's configuration to confirm if the network signal is the source.

Browse all codes in this manual (52)
Verified technical data. Last updated: March 2026

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