ABB ACS850 Firmware Manual page 19

Speed measurement with encoder/resolver
An encoder/resolver feedback can be used for more accurate motor control.
Follow these instructions when encoder/resolver interface module FEN-xx is installed in drive
option Slot 1 or 2. Note: Two encoder interface modules of the same type are not allowed.
Select the used encoder/resolver. For more information,
see parameter group
Set other necessary encoder/resolver parameters:
• Absolute encoder parameters (group 91, page 193)
• Resolver parameters (group 92, page 196)
• Pulse encoder parameters (group 93, page 196).
Save new parameters settings into the permanent
memory by setting parameter
Save.
Set parameter 90.10 Enc par refresh
switch the drive power off and on again) so that the new
parameter settings take effect.
Checking the encoder/resolver connection
Follow these instructions when encoder/resolver interface module FEN-xx is installed in drive
option Slot 1 or 2. Note: Two encoder interface modules of the same type are not allowed.
Set parameter 19.02 Speed fb sel
Enter a small speed reference value (for example 3% of
the nominal motor speed).
Reference can be entered on the control panel by
selecting REF EDIT in the main menu.
Start the motor by pressing the START button.
Check that the estimated
actual (01.08 Encoder1 speed
speeds are equal. If the values differ, check the encoder/
resolver parameter settings.
Hint: If the actual speed (with a pulse encoder) differs
form the reference value by a factor of 2, check the pulse
number setting (93.01 Enc1 pulse nr
nr).
90 Enc module sel on page 191.
16.07 Param save
to Configure
to Estimated.
(01.14 Motor speed
/ 01.10 Encoder2
/ 93.11 Enc2 pulse
90.01 Encoder 1 sel
90.02 Encoder 2 sel
91.01...91.31
92.01...92.03
93.01...93.13
16.07 Param save
to value
(or 90.10 Enc par refresh
19.02 Speed fb sel
est) and 01.14 Motor speed est
speed)
01.08 Encoder1 speed
01.10 Encoder2 speed
Start-up 19