8400 StateLine C | Reference manual
Motor control (MCTRL)
Encoder/feedback system
222
L
Firmware
≤
11.00 - DMS 8.0 EN - 10/2011
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
Min. measurable speed in [rpm]
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
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
