Group 6.4 - Speed Error Detection
Parameter Number | Parameter Name | Units | Default | Available Settings | Access | Change During Run | Scaling | Size (Bytes) | CAN Register | CAN Sub Index | Modbus Register |
|---|---|---|---|---|---|---|---|---|---|---|---|
P6-11 | Speed Error Trip Level | % | 10.0% | 0.0 ... 100.0% | RW | Y | 1 = 0.1% | 2 | 2262h | 0 | 611 |
P6-12 | Speed Error Trip Detection Time | sec | 0.5s | 0.0 ... 5.0s | RW | Y | 1 = 0.1 | 1 | 2263h | 0 | 612 |
Note
The Speed Error Trip does not operate (Function disabled) under the following conditions :
When P6-11 is set to zero
When motor control mode P4-01 is set to 2 (IM VF Mode)
In Open Loop operation this parameter defines the maximum permissible speed error (as % of the motor rated speed P4-06) between the Post-ramp Speed Controller Reference and the estimated rotor speed as calculated by the motor control algorithms. If the speed error exceeds this limit (for the time set in Parameter P6-12 Speed Error Trip Detection Time) , the drive will trip Sp-Err.
Example below was on an application with a 1370 rpm rated speed motor, 0.3s detection time and a 0.1% speed error trip level, where 0.1% equates to 1.37rpm (0.001*1370rpm)
In Closed loop operation this parameter defines the maximum permissible speed error between the encoder feedback speed value and the estimated rotor speed calculated by the motor control algorithms. If the speed error exceeds this limit (for the time set in Parameter P6-12 Speed Error Trip Detection Time) , the drive will trip Sp-Err.
Used in Conjunction with P6-11 (Speed Error Trip Level) to define to allowed time when the speed is above the value in P6-11 before tripping.