Rockwell Automation 1398-DDM-xxx USE MNL/ULTRA 200 DIG.SERVO.DR - Manual (Page 273)

Publication 1398-5.0 – October 1998
Creating Custom Motor Files D-9
The Hall signals, as well as the line-to-line back-EMF voltages, must
sequence according to the Allen-Bradley standard (refer to Figure D.2
and the “Motor Phasing” on page D-3). The Hall offset value is the
value the drive uses to correct for Hall signals that are shifted from the
line-to-line back-EMF.
Figure D.5(a) shows the Allen-Bradley standard for orientation of the
Hall signals to the line-to-line back-EMF voltages. Figure D.5(b)
shows an example of a 60
o
Hall offset from the standard location.
Startup Commutation
The startup commutation list box specifies the type of commutation to
be used at startup. The choices are:
●
6-Step ABS/Index,
●
8-Step ABS/Index,
●
Hall/Index, and
●
Hall/Hall.
The different types of startup are identified by their initial and final
commutation angle measurement. For example, the 6-Step ABS/Index
startup uses the 6-Step ABS for the initial commutation angle
measurement, and the index signal for the final commutation angle
measurement.
The Hall/Hall type of startup commutation should be used unless the
motor is a special version of an Allen-Bradley motor. The reasons for
this are:
●
The ABS signal is only available on Allen-Bradley motors.
●
Hall/Hall commutation means that the location of the Index signal
is unimportant.
Figure D.5 Hall Offsets
Intro Intro
Intro (a) Allen-Bradley Hall Location (0 o Offset) (b) Non-Standard Hall Location (60 o Offset)