Encoder With Htl Level At Di6/Di7 - Lenze L-force HighLine C 8400 Series Reference Manual

5.11.5

Encoder with HTL level at DI6/DI7


Note!
Single-track evaluation of the digital DI6/DI7 terminals as speed feedback
(C0115/2
for speed control at the digital DI6 terminal!
Low speeds with edge counting
The speed measurement is evaluated at the digital terminals DI6/DI7 with the edge-
counting procedure and a fixed scanning time that can be set in C00425/2.
The minimum speed that can be measured and the quantisation error of speed
measurement in the edge-counting procedure depend on the scanning time that can be
set in C00425/2
Depending on accuracy and the requirements with regard to the dynamic performance,
the respective scanning time must be selected and set in C00425/2:
Encoder
resolution
(Number of
increments)
8
16
32
64
128
256
512
1024
Maximum speeds with edge counting
Due to the lower input frequency (max. 10 kHz) compared to the terminals DI1/DI2,
operation with maximum speed at the terminals DI6/DI7 is limited.
terminals
( 310)
Encoder
resolution
(Number of
increments)
8
16
32
64
128
256
512
1024
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= 1 or 3) is not possible. Hence, a single-track encoder cannot be used
and the encoder resolution.
1 2 5 10
Min. measurable speed in [rpm]
1875 938 375 188
938 469 188 94
469 234 94 46.9
234 117 46.9 23.4
117 58.6 23.4 11.7
58.6 29.3 11.7 5.9
29.3 14.6 5.9 2.9
14.6 7.3 2.9 1.5
Max. measurable speed in [rpm]
L
8400 HighLine C | Reference manual
Motor control (MCTRL)
Encoder/feedback system
Scanning time [ms]
20 50 100
93.8 37.5 18.8
46.9 18.8 9.4
23.4 9.4 4.7
11.7 4.7 2.3
5.9 2.3 1.2
2.9 1.2 0.6
1.5 0.6 0.3
0.7 0.3 0.15
No restrictions
37500
18750
9375
4688
2344
1172
586
200 500 1000
9.4 3.8 1.9
4.7 1.9 0.9
2.3 0.9 0.5
1.2 0.5 0.2
0.6 0.2 0.12
0.3 0.12 0.06
0.15 0.06 0.03
0.07 0.03 0.01
Digital input
277