Speed

The speed calculation determines the mean speed in the time range set via the filter time speed:

Quantization fault_v in min-1 = 

(15 s x min-1) × scaling_factor_denominator / (scaling_factor_numerator x parameterized_filter_time)

Parameters involved (CSS..A):

  • Scaling_factor_numerator (= PPR count of the selected encoder):
    • 8708.1 (encoder 1)
  • Scaling_factor_denominator: 1
  • The scaling factor is fixed based on the configured encoder type.
  • Parameterized_filter_time:
    • 8708.3 (encoder 1)

In the case of safety encoders with MOVILINK® DDI, an additional fault of 0.4% of the actual speed is added to the process-related quantization fault:

Fault_v_DDI = Actual speed x 0.4% + Quantization fault_v

The speed calculation for the encoder EI7C FS determines the average speed over the last 4 recorded encoder increments. The response time of the encoder evaluation is thus dependent on the actual speed. The fault in the calculated speed value equals a maximum of 1% of the actual speed:

Fault_v_EI7C FS = Actual speed x 1%

Setting the Filter time speed HTL (8708.4) parameter makes it possible to filter the calculated speed via a sliding average value filter with the parameterized length.