Speed Following Error; Speed Difference; Following Error Timer - KEB COMBIVERT F5 Instruction Manual

Parameter Description - Special Functions
Speed following error
Speed difference
Following error timer
i
Triggers a drive warning if the actual motor speed deviates from the com-
manded speed by more than the window defined in parameter LF.58 and
for the length of time defined in LF. 5. This function only works in close
loop speed control mode, ie. LF30=2,3 or 5.
Settings: 0 = Off (Use when LF.30 = 4)
1 = On, drive indicate speed following error when motor
speed varies from the set speed by the amount in LF.58
and for the time in LF.5, output X2A.18 (or whichever
output is programmed with ASd function).
2 = Can be used to trigger an external drive fault when a speed
deviation occurs. For the function to work, a jumper wire
must be connected betwen output X2A.18 (or whichever
output is programmed with ASd function) and the option
input X2A.10. Note however that when this is selected
it is not possible to us the option input to activate emer-
gency power mode from the same input (LF.61 = di 1).
additionally, this function is not available when LF.2 = d
spd. If LF.57 = 2 and the jumper is not present, the drive
will trigger the error E.EF.
Sets the +/- window for the speed following error in percent of the
set speed.
Unit: %
Value range: 0...30%
Default setting: 10%
Adjustment value: as necessary
Defines the length of time the following error can exist before the fault is
triggered.
Unit: Seconds
Value range: 0.0...1.0 sec.
Default setting: 1.0 sec.
Adjustment value: as necessary
When trying to trouble shoot the cause of this fault, it helps to increase
LF.58 and LF.59 to the maximum values to prevent the fault from
triggering.
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