Determination Of The Field Angle Without Motor Motion (Mp2254.X = 0) - HEIDENHAIN iTNC 530 HSCI Technical Manual

7.9.2 Determination of the field angle without motor motion (MP2254.x = 0)

Field angle not yet
determined
(MP2256.x = 0)
Field angle already
determined
(MP2256.x ≠ 0)
July 2013
A distinction must be made if you intend to determine the field angle without
motor motion:
Commissioning: No field angle has been determined yet (MP2256.x = 0)

A field angle has been already determined (MP2256.x ≠ 0)

The field angle is determined automatically after switching on the drive. This
process lasts approximately 4 to 6 seconds (the PLC program must not
rescind the drive enabling during this time). The Finding field angle progress
bar appears.
If the power module is not active before the determination of the field angle
begins, the error message 8B40 No drive release <axis> appears. If the
power module switches off during the determination, 8B50 Axis module
<axis> not ready appears.
If the field angle on this machine was not yet determined after the control was
started (MP2256.x = 0), the determination starts automatically. The method
for determining the field angle is stored in MP2550.x. The determined field
angle is stored in MP2556.x.
If the field angle on this machine was already determined after the control was
started (MP2556.x ≠ 0), a distinction must be made:
If an absolute encoder with EnDat interface is being used:

The absolute position of the encoder is read immediately after the control
has been started. The field angle from MP2256.x is assigned to this position.
Therefore, the first motor motion already occurs with the determined field
angle.
If an incremental encoder is being used:

Immediately after the control has been started and the control voltage has
been switched on, then depending on MP2250.x a field angle is determined
with which the motor can be traversed over the reference mark. After
traversing the reference mark, the field angle from MP2256.x is assigned.
The subsequent motor motions utilize the field angle from MP2256.x.
7.9 Field orientation
1113