A31429 — Encoder 1: Position difference hall sensor/track C/D and A/B too large

The drive monitors encoder 1 and raises this alarm when the measured position difference is too large: the error for track C/D is greater than +/-15 ° mechanical or +/-60 ° electrical, or the error for the Hall signals is greater than +/-60 ° electrical. For orientation: one period of track C/D corresponds to 360 ° mechanical, and one period of the Hall signal corresponds to 360 ° electrical. The monitoring responds, for example, when Hall sensors are connected as an equivalent for the C/D tracks with the incorrect rotational sense, or when the supply values are not accurate enough. Depending on the drive's configuration, the same condition can also be output as a fault or without any reaction.

• The error for track C/D is greater than +/-15 ° mechanical or +/-60 ° electrical, or the error for the Hall signals is greater than +/-60 ° electrical.
• Hall sensors are connected as an equivalent for the C/D tracks with the incorrect rotational sense.
• The supply values are not accurate enough.
• Track C or D is not connected.

1. Read the alarm value in r2124 (interpret decimal): it shows the measured deviation as a mechanical angle if track C/D is affected, or as an electrical angle if the Hall signals are affected.
2. Check whether track C or D is not connected.
3. If Hall sensors are connected as an equivalent for track C/D, correct their direction of rotation.
4. Check that the encoder cables are routed in compliance with EMC.
5. Check the adjustment of the Hall sensor.

• The drive stores the measured deviation in r2124; interpret the value as a decimal number (16 bits with sign).
• For track C/D: the measured deviation as a mechanical angle — 182 dec corresponds to 1 °.
• For the Hall signals: the measured deviation as an electrical angle — 182 dec corresponds to 1 °.

• r2124 — the alarm value of this message: read it as a decimal to see the measured deviation (182 dec corresponds to 1 °) and whether track C/D or the Hall signals deviate.
• p0491 — Motor encoder fault response ENCODER: the manual references it for this message; it governs how the drive responds when the condition is output as a fault, so check its setting if that happens.

As an alarm, this message requires no acknowledgment from you and the drive takes no automatic action in response. If the drive's configuration outputs the same condition as a fault instead, it must be acknowledged immediately, and the drive's response then follows the encoder fault response set in p0491.