How can resolve problem A2027 FEN TEMP MEAS FAILURE alarm in ABB ACS850 Drive ?
Cause : Error in temperature measurement when temperature sensor (KTY or PTC) connected to encoder interface FEN-xx is used.
Check that parameter 31.02 Mot temp1 src / 31.06 Mot temp2 src setting corresponds to actual encoder interface installation (09.20 Option slot1 / 09.21 Option slot2):
If one FEN-xx module is used:
- Parameter 31.02 Mot temp1 src / 31.06 Mot temp2 src must be set either to KTY 1st FEN or PTC 1st FEN. The FEN-xx module can be in either Slot 1 or Slot 2.
If two FEN-xx modules are used:
- When parameter 31.02 Mot temp1 src / 31.06 Mot temp2 src is set to KTY 1st FEN or PTC 1st FEN, the encoder installed in drive Slot 1 is used.
- When parameter 31.02 Mot temp1 src / 31.06 Mot temp2 src is set to KTY 2nd FEN or PTC 2nd FEN, the encoder installed in drive Slot 2 is used.
Error in temperature measurement when KTY sensor connected to encoder interface FEN-01 is used.
-FEN-01 does not support temperature measurement with KTY sensor. Use PTC sensor or other encoder interface module.