Why Does an S-Flex (SFD212) with Bypass Freewheel to a Stop Instead of Following the Deceleration Ramp Time?

When an S-Flex (SFD212) drive with a bypass configuration receives a stop command, it does not follow the programmed deceleration ramp time (DEC). Instead, the motor performs a freewheel (coast) stop.

Why This Happens

When the stop command is issued:

1. The Drive Output Contactor (DOC) opens immediately.
2. This causes the run permissive signal on terminal R (when F112 = 1) to be removed.
3. The motor is disconnected from the VFD output.
4. Since the drive is no longer controlling the motor, the programmed deceleration ramp cannot be applied.
5. The motor coasts to a stop based on its inertia and load conditions.

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:

Support | Schneider Electric Global (se.com)