Up to three encoder channels can be evaluated simultaneously. This makes it possible to select the encoder channel for the commutation angle, the speed configuration and the position information. The evaluation is made via interfaces X6, X7 and – if the option is available – on X8.
Channels 1 and 2 are part of the controller's standard on-board configuration. A third channel X8 is optional. This must be taken into consideration in designing the controller.
Determining the encoder offset
For third-party motors the encoder offset is determined using a wizard. For the definition the motor is run in "Current control" mode (at rated current). For a correct definition it is necessary for the motor to be able to align itself freely. It is not necessary to determine the encoder offset for LTi standard motors.
A connected brake is automatically vented, provided it is connected to the brake output and the output has been configured for use of a brake. The process takes about 10 seconds. Then the current value of the offset is entered in the display field and the original parameter setting is restored.
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NOTE: With the encoder configuration, wire break detection is activated. |
Bild: Encoder selection
Parameters
| P. no. |
Parameter name |
Function |
|---|---|---|
| P 0520 | ENC_MCon | Selection of encoder channel for commutation angle (feedback signal for field oriented control) |
|
P0521 |
ENC_SCon | Selection of encoder channel for speed configuration (feedback signal for speed control) |
| P 0522 | ENC_PCon | Selection of encoder channel for position information (feedback signal for position control) |
Tabelle: Channel selection
Copyright © LTi DRiVES GmbH, Januar 2013, ID-Nr.: 0842.26B.1-00 DE