Anti-Stall Feature
Anti-Stall
The Anti-Stall function prevents over-current trips during the Acceleration Ramp Time (P8-03) should the time be too short to accelerate the load to the target speed. It does this by holding a speed until the Output Current (P0-25) has been reduced before carrying on to accelerate to the speed reference.
Enable Anti-stall by setting P10-09 = 1.
Anti-Stall Operation Guide
Anti-Stall Operation Sequence
| Anti-Stall Timing Diagram  |
NoteReal-time Motor Current can be monitored via P0-25 or on the drive display or through OptiTools Pro | |
Parameter Number | Parameter Name | Units | Default | Available Settings | Access | Change During Run | Scaling | Size (Bytes) | CAN Register | CAN Sub Index | Modbus Register |
|---|---|---|---|---|---|---|---|---|---|---|---|
P0-25 | Motor Current | Amps | 0.0A | Drive Dependent | RO | N | 1 = 0.1A | 1 | 200Dh | 0 | 10025 |
P10-09 | Anti-Stall Enable | N/A | 0: Disabled | 0: Disabled 1: Enabled | RW | N | N/A | 1 | 23F1h | 0 | 1009 |
P10-10 | Anti-Stall Limit | % | 100.0% | 100.0 ... 250.0% | RW | N | 1 = 0.1% | 2 | 23F2h | 0 | 1010 |
P10-11 | Anti-Stall Hysteresis | % | 10.0% | 0.0 ... 50.0% | RW | N | 1 = 0.1% | 2 | 23F3h | 0 | 1011 |
Setting | Function |
|---|---|
0 | No Anti-Stall Prevention, if the acceleration time is too short for a given high load, then the drive can trip on over-current. |
1 | Anti-Stall Prevention enabled: If During acceleration the output current exceeds the value set in the Anti-stall limit parameter P10-10 then the drive will stop accelerating and hold the current speed, once the current drops below the value set in P10-10 minus the Anti-Stall hysteresis band P10-11 then acceleration will continue. |
Set as a percentage of Motor Rated Current (P4-03). This forms the limit that if the drive reaches during acceleration the Anti-Stall feature will limit the speed until the current drops below this value.
Set as a percentage of Motor Rated Current in P4-03.
The value set should be below the value set in the torque limit parameters P4-18 and P4-19 so that the 2 functions don’t conflict with each other.