Visual feedback of the EI8Z built-in encoder

The EI8. built-in encoders report their operating state visually via a duo LED. The feedback depends on the version of the firmware of the MOVILINK^® DDI communication unit together with the EI8Z encoder.

The firmware version can be determined with the MOVISUITE^® engineering software from SEW-EURODRIVE under the device and option characteristics of the motor with MOVILINK^® DDI.

If none of the measures are successful, contact SEW-EURODRIVE Service. In this case, decommission the built-in encoder.

EI8Z visual feedback with firmware version 2.00 or later

LED color	Meaning and measures
Off	Encoder not supplied or defective
Permanently green	Encoder operational, no faults
Permanently yellow	The encoder is reporting self-diagnostic information. The function of the encoder is given without restriction. The mechanical adjustment of the encoder is within the permitted tolerance range. No measures are required. In the case of applications with vibration stress or highly fluctuating ambient temperatures, we recommend a mechanical adjustment of the fan and of the distance between the pole ring and the encoder if there are functional faults, see chapter Installing EI8. – DRN../DRU../DR2..71 – 132S motors, with connection unit.
Permanently red Inverter fault message; fault 13.26, 13.27 on the inverter and in MOVISUITE^®	Encoder reports self-diagnostic information or a fault. The mechanical adjustment of the encoder is outside the permitted tolerance range. This fault is also reported on the inverter. Check the encoder and pole ring for damage or magnetizable contamination. Replace or clean the fan if necessary. Check the fan to ensure it is seated correctly and check the distance between the pole ring and encoder. If necessary, readjust and resecure the fan and pole ring, see chapter Installing EI8. – DRN../DRU../DR2..71 – 132S motors, with connection unit.

EI8Z visual feedback with firmware version 1.00

In firmware version 1.00, the visual feedback of the EI8Z encoder is exclusively for product support. Note that, regardless of the LED color, a fault will only be reported via a fault message from the inverter as described below:

Diagnostics	Meaning and measures
Inverter fault message; fault 13.26, 13.27 on the inverter and in MOVISUITE^®	The encoder diagnostics has detected a fault or the encoder is defective. The mechanical adjustment of the encoder is outside the permitted tolerance range. This fault is also reported on the inverter. Check the encoder and pole ring for damage or magnetizable contamination. Replace or clean the fan if necessary. Check the fan to ensure it is seated correctly and check the distance between the pole ring and encoder. If necessary, readjust and resecure the fan and pole ring, see chapter Installing EI8. – DRN../DRU../DR2..71 – 132S motors, with connection unit.

Diagnostics

Meaning and measures

Inverter fault message; fault 13.26, 13.27 on the inverter and in MOVISUITE^®

The encoder diagnostics has detected a fault or the encoder is defective.

The mechanical adjustment of the encoder is outside the permitted tolerance range. This fault is also reported on the inverter.

Check the encoder and pole ring for damage or magnetizable contamination. Replace or clean the fan if necessary.
Check the fan to ensure it is seated correctly and check the distance between the pole ring and encoder. If necessary, readjust and resecure the fan and pole ring, see chapter Installing EI8. – DRN../DRU../DR2..71 – 132S motors, with connection unit.