Why will the ATV320 autotune function not work in NST state?

Issue:
ATV320 will not autotune in NST state

Product Line:
ATV320

Environment:
All

Cause:
Autotune not functioning

Resolution:
Sometimes, the drive's configuration can prevent an Autotune.
For instance, if the drive’s command channel is from a communication network such as Modbus, then a specific command word order must be sent before performing tuning with the keypad.
1- Power on the drive; ATV320’s state is NST
2- Write CMD = 6; ATV320’s state is RDY
3- Write CMD = 7; ATV320’s state is RDY
4- With the keypad, make “Autotuning” = “Apply Autotuning”; the tune isn’t done
5- Write CMD = 271; ATV320’s state is RDY
6- With the keypad, make “Autotuning” = “Apply Autotuning”; the tune is done

Another possibility is when the drive status is NST.
For instance, if the drive is set for 3-wire control and DI1 is not active, the status will be NST, and an Autotune is not allowed.

“If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions:

Frequently Asked Questions - Schneider Electric (se.com)

If this FAQ did not solve your issue, you can call us at 1-888-778-2733 Option 2 and then 4 or e-mail us at drive.products.support@se.com to create a case with our Technical Support Team.

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