Lenze 8400 motec User Manual download pdf (Page 162)

100

101

5 Motor control (MCTRL)

5.11 Encoder/feedback system

162

Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05

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Low speeds with edge counting

The minimum speed that can be measured and

the quantisation error of speed measurement in the

edge-counting procedure (C00496

= 3) depend on the scanning time that can be set in C00425/1

and the encoder resolution.

Depending on accuracy and the requirements with regard to the dynamic performance, the

respective scanning time must be selected and set in C00425/1

Encoder

resolution

(Number of

increments)

Scanning time [ms]

1 2 5 10 20 50 100 200 500 1000

8 1875 938 375 188 93.8 37.5 18.8 9.4 3.8 1.9

16 938 469 188 94 46.9 18.8 9.4 4.7 1.9 0.9

32 469 234 94 46.9 23.4 9.4 4.7 2.3 0.9 0.5

64 234 117 46.9 23.4 11.7 4.7 2.3 1.2 0.5 0.2

128 117 58.6 23.4 11.7 5.9 2.3 1.2 0.6 0.2 0.12

256 58.6 29.3 11.7 5.9 2.9 1.2 0.6 0.3 0.12 0.06

All data in [1/min]

1 2 ... 157 158 159 160 161 162 163 164 165 166 167 ... 517 518

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