Operating Mode Notch Position Search - Baumuller b maXX BM3000 Operating Manual

Description of the Software Modules and Parameters
4.8.8

Operating mode Notch position search

The operating mode Reference notch position is used to determine the installation posi-
tion (notch angle) of the encoder with synchronous machines.
For Baumüller motors with absolute value encoder and electronic type plate the notch an-
gle is stored in the electronic type plate and therefore does not have to be determined.
For motors with absolute value encoder without electronic type plate the notch angle is
determined once and stored in the EEPROM of the controller.
For motors with relative encoder system the notch angle search must occur after each
commissioning and activation of the motor bearing encoder!
x
DANGER!
A motor that is operated with an incorrect notch position can move uninten-
tional with maximum power!
Dangerous movings can be caused from faulty triggering of connected motors. Caus-
es could be:
n Incorrect or faulty wiring or cabling
n Error at the operation of the components
n Incorrect input of parameters before commissioning
n Error at the sensor or signal encoder
n Defective components
n Error in the software
This error can appear immediately after switch on or after an undefined time period
during operation.
Therefore:
m Activate position error speed monitoring. This monitoring reliably avoids an uncon-
Three methods are available to determine the notch position (refer to Z127.1–).
A current set value is specified at the methods 0 and 1 by the controller. This set value is
limited to the set value, which was preset in parameter Z127.4–.
m Method 0
trolled running of the motor.
The motor must be movable by one pole pair in both directions in order to use this
method. This method is suitable for the dismounted motor, which is free of load.
During this procedure the Current set value is linearly
Z127.4–
increased to the
is shifted by a half pole pitch. The notch position is calculated from the relevant encoder
angle.
The determination of the notch position is made twice. Both results must be checked
for consistency. If both of the notch positions deviate by more than 22.5°, a third pole
position search must be completed. This result must be compared with the result of the
2nd calculation. If the deviation of both notch positions is out of tolerance, the error No.
716 is generated..
Maximum current. The motor engages into a position, which
Parameter manual b maXX BM3000
Document no.: 5.12001.07
(Z127.5– Rate of current rise)
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