Lenze 8615E - Manual (Page 67)

65
3.4.2 Digital frequency input
With the corresponding configuration (C005) you can use the
9-pole Sub-D socket X5 or X8 as digital frequency input, where two
complementary signals shifted by 90° are provided. If you use an
HTL-encoder, it is sufficient to provide only the signals A and B.
The inputs A\ and B\ must then be bridged using +Vcc (pin 4).
The maximum input frequency is 300 kHz for TTL encoders and
100 kHz for HTL encoders.
Assignment of sockets X5/X8
Pin Name Input/Output Explanation
1
2
3
4
5
6
7
8
9 B
A\
A
+Vcc
GND
---
---
---
B\ Input
Input
Input
Output
Input
2nd encoder signal
1st encoder signal inverse
1st encoder signal
Supply voltage terminal VE9
Internal ground
not used
not used
not used
2nd encoder signal inverse (S5 = OFF)
If you want to use a digital frequency input, the internal set-value 1
is a frequency set-value, directly proportional to the frequency of
the input signals. The conversion factor results from the settings
under C026 and C027.
Frequency set- value = Digital frequency
Encoder adjustment (C027)
Encoder constant (C026)
⋅
Example:
Digital frequency =
0...25 kHz
Encoder constant (C026) = 512 [pulses/Hz]
Encoder adjustment (C027) = 1,024
Frequency set-value =
0...50 Hz
The phase position of the input signals is also used to select the
direction of rotation of the drive. The influence of the terminals 21
and 22 remains active.
A
B
CW rotation CCW rotation
B
B
-
A
-
A
A
-
B
-
With the controller enabled and the system cable only connected at
one side of the digital frequency input X5/X8, interferences may
cause the drive to start or reverse unexpectedly.