Why do ATV320 parameter changes have no effect?
Resolution:
In many cases, parameter changes cannot be applied on the ATV320 because a Function Block (ATV Logic) program is running. When active, the Function Block logic can override user‑entered parameter values.
To verify this:
Navigate to:
DRI → CONF → FULL → FBM → FBP → NFB → FBST
- FBST = Function Block Status
- If FBST shows anything other than “IDLE,” then a Function Block program is active.
If you change FBST to “STOP,” you may temporarily be able to modify parameters. However, once the Function Block is re‑enabled, it will likely overwrite your changes again.
Because Function Block programs are OEM‑created, you will need to contact the machine builder or OEM for support.
Schneider Electric Drives Technical Support does not have access to OEM Function Block code and cannot modify or override it.
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 atdrive.products.support@se.comto create a case with our Technical Support Team.
If you are not located in North America, please contact your local Customer Care Center for assistance:
Released for: Schneider Electric Canada
