User`s manual

apfiff09 marine vacon • 209

24-

7.12.13

Encoder Fault function

Encoder supervision gives fault in case there are no pulses from encoder. Requirement is that

reference is above 1 Hz and torque can reach 100 % level. This torque level can be adjusted by Iq

Fault limit parameter. This limit may need adjustment when torque limit is below 100 %.

Alternative method to detect encoder fault is Speed Error detection.

P2.12.12.1 Encoder Fast Hz Limit ID1801

Frequency limit where detection is made using fast detection.

P2.12.12.2 Fast Time Limit ID1805

Delay to encoder fault when fault happens above Encoder Fast Hz Limit.

P2.12.12.3 Iq Fault Limit ID1800

This defined Iq current limit what must be exceeded before situation is determine to be

encoder fault is pulses are missing from encoder at the same time.