July 2013 7.9 Field orientation 1115
7.9.3 Determination of the field angle with motor motion (MP2254.x = 2/3)
Since the motor moves in a certain direction while finding the field angle, it
should be near the midpoint of the traverse path before the field angle is
determined.
Axes with linear/torque motors can be slid "by hand" if the brakes are not
applied.
While the field angle is being found, the speed controller and position
controller are open and the drive controller is active. This means that the motor
is moved (approx. 2 pole pairs) and the brake must be open until the field angle
is determined.
MP2254.x = 2
The PLC initial servicing program, whose name and path are entered in the
OEM.SYS file after the PLCPWM = entry, must ensure that the inverters are
ready after "Switch on external dc voltage," but that the motor brakes are only
open while determining the field angle. Alternately, the motor brakes can be
opened manually for the duration of the field angle determination.
MP2254.x = 3
Under certain conditions, determination of a field angle with the help of the
PLC is not necessary or desired. Here the motor is moved immediately after
the FIELD ORIENT. key is pressed, and the field angle is determined. This
mode can be used if
there are no brakes,
in the Commissioning Current Controller mode of operation, where the
brakes are always open,
the user ensures that the brakes can be opened manually or with the PLC.
Hanging axes need 100 % weight compensation.
Please contact HEIDENHAIN if this is not the case.
Limit switches are ignored!
If axes move into an illegal area, press the emergency stop button!
When using incremental encoders with distance-coded reference marks,
MP334.x (nominal increment between two fixed reference marks) must be
set correctly.
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