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3.4.2 Digital frequency input
With the corresponding
configuration
(CO05) you
tan
use the
g-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
X5lX8
InputlOutput
Input
Input
Input
output
Input
2nd encoder Signal
1 st encoder
Signal
inverse
1 st encoder Signal
Supply voltage terminal VE9
Internal ground
not used
not used
not used
2nd encoder
Signal
inverse
(55
= OFF)
If you want to use a digital frequency input, the internal
setpoint
1 is
a frequency setpoint, directly proportional
to
the frequency of the
input Signals. The
conversion
factor
results from the
settings
under
CO26 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
SetpOint
=
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.
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.
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hze
67
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