Lenze 8400 motec - Manual (Page 158)

5 Motor control (MCTRL)
5.11 Encoder/feedback system
158 Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05
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5.11 Encoder/feedback system
This function extension is available from version 02.00.00!
The speed feedback mandatory for the V/f control (VFCplus + encoder) can be fed in at the digital
input terminals (DI1/DI2) via an HTL encoder.
• In order that the HTL encoder can be evaluated correctly, the digital input terminals (DI1/DI2)
must be configured as frequency inputs.  Configuring DI1 and DI2 as frequency inputs ( 185)
• The actual speed value ( C00051 ) is also calculated when motor control without encoder
feedback has been selected if an encoder is connected and "1: Encoder signal FreqIn12" has been
selected in C00495 .
[5-14] Signal flow - encoder interface

Danger!
• For (open circuit) monitoring of the encoder, it is recommended to set the "Fault"
response (Lenze setting) in C00586 for safety reasons!
• To avoid interference when using an encoder, only use shielded motor and encoder
cables.
• Make sure that the maximum input frequency of 10 kHz at the frequency inputs is not
exceeded when the V/f control (VFCplus + encoder) is used.
• When evaluating a single-track encoder, make sure that the sign has been selected
correctly. Otherwise, there is a risk that the motor may overspeed.
1
0
2
C00495
FreqIn12
C00497/1
C00051
C00420/1
C00425/1
10 kHz
C00496
Speed encoder
selection
Filter time Encoder number of incr.
Actual speed value
Speed controller/
slip regulator Encoder sampling time
Encoder evaluation procedure