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How to troubleshoot an ILF fault on an Altivar Process Drive?

How to troubleshoot an ILF [Internal Link Error] fault on an Altivar Process Drive?

Product Line:
Altivar Process Drive (ATV630, ATV930, ATV650, ATV950, ATV660, ATV960, ATV680, ATV980)

All serial numbers for Altivar Process Drive



Communication interruption between option module and the drive.

  • Verify connection to the proper slot
    • Slot A
      • Communication Modules (DeviceNet, Ethernet IP, Profibus, ProfiNet...)
      • I/O & Relay Module
    • Slot B
      • Encoder Card (Analog, Digital, Resolver...)
      • I/O & Relay Module
  • Verify the environment (electromagnetic compatibility)
  • If using Communication Module, check drives firmware version. (For most cases it should be at least V1.5IExx)
  • Save configuration file on keypad, remove option module and do a factory reset. If fault disappears the possible bad option module. 
  • Replace the option module.
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