Using DynaStop® in conjunction with the STO function
To use the DynaStop® function in conjunction with the STO function, SEW-EURODRIVE recommends control using the safety function SS1-t.
To do so, the Behavior at idle state parameter must be set to "Brake applied/drive not energized" (path: Functions > Drive functions > FCB 02 Stop default).
The following table shows the behavior of the DynaStop® function depending on the parameter setting:
Index | Parameter | Setting | Meaning |
|---|---|---|---|
8563.1 | Behavior at idle state (Path: Functions > Drive functions > FCB 02 Stop default) | Drive energized (brake released/ | If the enable signals are revoked, the drive decelerates according to the active deceleration setpoint. When the drive reaches speed "0", DynaStop® is not activated. Motor position hold control is active. |
Drive not energized (brake applied / DynaStop® activated) | If the enable signals are revoked, the drive decelerates according to the active deceleration setpoint. When the speed is "0", DynaStop® is activated. The motor is de-energized. | ||
8501.3 | Apply brake/activate DynaStop® in STO state (Path: Functions > Drive functions > FCB01 Output stage inhibit > Brake/DynaStop®) | 0 (no) | The DynaStop® status remains unchanged when STO is activated. |
1 (yes) | DynaStop® is activated (not safety-related) when STO is activated. Information: Observe the permitted operating range of the DynaStop® function. |
Required setting | ||
Recommended setting |
The following figure shows the use of the DynaStop® function in conjunction with the STO function and controller according to SS1-t:
[1] | Parameter: Behavior at idle state = "Drive not energized (brake applied / DynaStop® activated)" (Factory setting) | |
[2] | Parameter: Behavior at idle state = "Drive energized (brake released / DynaStop® deactivated)" (Path: Functions > Drive functions > FCB 02 Stop default) | |
t | Time | |
t1 | Point in time at which the deceleration ramp is initiated | |
t2 | Point in time at which STO is activated | |
Δt | Time span between initiating the deceleration ramp and STO | |
Range of safe time delay | ||
Range with active STO function |
