56
XtrapulsCD1-a
Chapter 8
– Appendix
10 - INCREMENTAL ENCODER OUTPUTS
Two A and B channels in quadrature with one Z marker pulse per revolution allow closing the position loop via the
NC.
The
Output encoder resolution
parameter is chosen according to following table:
Maximum motor speed (rpm)
up to 1600
up to 3200
up to 6400
up to 12800
up to 25000
Encoder output resolution (ppr)
512 to 16384
512 to 8192
512 to 4096
512 to 2048
512 to 1024
The resolution value defined in the
Output encoder resolution
parameter can be divided by 2, 4 or 8 by
selecting the
Resolution division ratio
parameter.
The
Output encoder deadband
parameter introduces a deadband at standstill around the current resolver
position in order to avoid oscillations of +/- 1 encoder edge on channels A and B. The value 4095 corresponds to
1/16 of the motor shaft revolution.
The
Zero pulse origin shift
parameter allows shifting the marker pulse position on channel Z with regard to the
resolver zero position. The value 32767 corresponds to one motor shaft revolution. The marker pulse width is
equal to 1/4 of the A and B channels period.
11 - USE OF THE "EXTERNAL CURRENT LIMITATION" INPUT
When
Analog current limit reversal
is selected in the
Current limit
menu, the maximum torque is available for a
10 V voltage applied on the
I limit
input and there is no torque in the motor for a 0 V voltage applied on the
I limit
input.
The default configuration is
Analog current limit reversal
unselected. In this case, there is no torque limitation
for 0 V applied on the
I limit
input, so the maximum torque is available with the
I limit
input is not connected.
