
apfiff09 marine
VACON®
•
249
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
Classified as Public
7.12.13
Encoder Fault function
Encoder supervision gives fault in case there are no pulses from encoder. It is required that the
reference is above 1 Hz and that the 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 Supervision
ID1353
Do not select 3 while drive is in run state.
1
= Warning
2
= Fault
3 =
Warning; Change to Open Loop
This selection changes operation mode to Open Loop Sensorless when encoder fault
is detected.
Note: It’s recommended to activate I/f start when this is selection is used and
speed
remains long period of times in zero speed area.
P2.12.12.2
Encoder Fast Hz Limit
ID1801
Frequency limit where detection is made using fast detection.
P2.12.12.3
Fast Time Limit
ID1805
Delay to encoder fault when fault happens above Encoder Fast Hz Limit.
P2.12.12.4
Iq Fault Limit
ID1800
This defines the Iq current limit that must be exceeded before the situation is determined
to be an encoder fault, if pulses are missing from encoder at the same time.
P2.12.12.5 EncPulseFltLimit
ID778
Fault counter limit when F43 S14 is given.
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