trapulsPac - User Guide
Chapter 3 – Reference
3.2.2.7.3 - TTL Encoder
An incremental TTL encoder can be connected to Xtrapuls drives as motor feedback or only as position feedback.
Motor Feedback:
Incremental TTL encoder is not absolute for motor commutation, so:
- In a first time, an auto-phasing must be performed to define the motor pole pair number, motor phase order, and
encoder offset.
- Each time the drive is restarted with 24 V, a motor-phasing must be performed before the motor can be
controlled.
Note:
- Motor-phasing applies torque and moves the motor
- Power supply must be on
- Please check that the motor is at standstill and its movement over one revolution dangerous neither for operator
nor machine.
- Motor-phasing does not work with vertical axis or axis with driving load.
Position Feedback:
If the encoder is used as a position feedback only (motor feedback is resolver) then the encoder resolution
defined in object 0x608F must be the encoder counts for one motor revolution.
3.2.2.7.4 - Sin-Cos Encoder
An incremental SinCos encoder can be used with Xtrapuls drives as an incremental TTL encoder.
An internal SinCos interpolation allows the drive working at a higher resolution, which means better results on the
speed loop.
3.2.2.7.5 - Hall Effect Sensor
The Hall effect sensor can be used with a TTL incremental encoder or a Sin-Cos incremental encoder to avoid a
motor phase search with motor-phasing operation each time the 24 V supply is applied.
The Hall effect sensor parameters are calculated with the auto-phasing procedure.
Parameters depending on the Hall effect sensor:
- Motor phase order: 0x3410,2
- Sensor offset: 0x3410,3
- Hall effect sensor parameter: 0x313E,0
Index Object Name Type Attr.
0x313E VAR HES configuration Unsigned16 rw