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What is INFR error or Internal Error 27 in ATV930 Drive ?

INFR or error 27 is the watchdog of the CPLD. It can happen when the communication between one microcontroller and another component is corrupted.
It can be due if the application is noisy (Electro Magnetic Noise). Therefore, check the EMC of the application.
Another possibility is if you are using an external 24V power supply to supply the control block.
In this case, the drive and the control block should be switched on together.

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