B&R Inverter | ILF error

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Hi @kuma1p ,
from ACOPOSinverter P66 User’s manual:

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I see in our Support database, when a customer reports ILF fault, the cause of the problem is related, in most of cases, to:

  1. HW failure
  2. EMC problem
  3. old firmware installed on POWERLINK card

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I see an interesting post Required AR upgrade for new P66 inverters made by @Mohamed where He suggested to upgrade the AR too.
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Regarding powerlink communication card 8I0IF108.400-3 (Which hw version do you have? Do you have the same hw version for all of yours 6 ACOPOS inverters):

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Final input from AI: Which is the cause of ILF error on B&R Automation ACOPOSinverter 8I66T400150.0P-000?

The ILF error (Internal Link Fault) on a B&R Automation ACOPOSinverter, specifically the P66 series model 8I66T400150.0P-000, is primarily caused by an interruption in communication between the inverter’s main power section and its option board (communication card).

Common Root Causes

  • Missing 24 VDC Supply: The communication option board requires a separate 24 VDC supply to function. If this power is missing when the drive is switched on, it cannot establish a link, triggering the ILF fault.

  • Hardware Incompatibility/Firmware Mismatch: Using a newer P66 inverter release with older Automation Runtime (AR) versions can lead to communication board interruptions.

  • Physical Connectivity Issues: Poor seating of the communication card or faulty internal wiring between the card and the base unit.

  • Electromagnetic Interference (EMC): High levels of electrical noise can disrupt the internal high-speed serial link between the module and the inverter control.

    Thanks
    Ciao
    Valerio