Issue:
What is the cause of  ILF [Internal Link Error] fault on an Altivar Process Drive?

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

Environment:
All serial numbers for Altivar Process Drive

Cause:
N/A

Resolution:

Cause
Communication interruption between option module and the drive.

Remedy

• 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 then it might be a bad option module.
• Replace the option module.

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