It is indeed possible to configure the deceleration time for motor shutdown in the B3 series. To do so, you will need to adjust the parameter P5.003. Please refer to the detailed settings illustrated in the figure below.

Additionally, you can configure the deceleration time in PR mode settings using ASDASoft, as shown in the figure below.

For instance, if you set the deceleration time for forward limit to 50ms, you can observe when the forward limit inhibit is triggered by using the DI, the motor speed will not immediately drop to zero but instead experience a deceleration time.