Omron VARISPEED F7 User Manual page 340

Display
Motor Overload
Detected when L1-01 = 1 to 3 and
the Inverter's output current
exceeded the motor overload
OL1 curve.
Motor Overload The overload curve is adjustable
using parameter E2-01 (Motor
Rated Current), L1-01(Motor Pro-
tection Selection) and L2-02
(Motor Protection Time Constant)
Inverter Overload
OL2 The Inverter output current
Inv Overload exceeded the Inverter's overload
curve.
Overtorque Detection 1
The Inverter's output current (V/f
OL3 control) or the output torque (Vec-
Overtorque Det 1 tor Control) exceeded L6-02 for
longer then the time set in
L6-03 and L6-01 = 3 or 4.
Overtorque Detection 2
The Inverter's output current (V/f
OL4
control) or the output torque (Vec-
Overtorque Det 2
tor Control) exceeded L6-05 for
longer then the time set in
L6-06 and L6-04 = 3 or 4.
High Slip Braking OL
The output frequency stayed con-
OL7
stant for longer than the time set
HSB OL
in n3-04 during High Slip Brak-
ing.
Undertorque Detection 1
The Inverter's output current (V/f
UL3 control) or the output torque (Vec-
Undertorq Det 1 tor control) fell below L6-02 for
longer then the time set in
L6-03 and L6-04 = 7 or 8.
Undertorque Detection 2
The Inverter's output current (V/f
UL4 control) or the output torque (Vec-
Undertorq Det 2 tor control) fell below L6-05 for
longer then the time set in
L6-06 and L6-04 = 7 or 8.
Motor Overspeed
Detected when F1-03 = 0 to 2 and
A1-02 = 1 or 3.
OS
The motor speed feedback
Overspeed Det
(U1-05) exceeded the setting in
F1-08 for a longer time than the
setting in F1-09.
Table 7.1 Fault Detection
Meaning Probable Causes
The load is too large. The acceler-
ation time, deceleration time or
cycle time are too short.
The voltage settings of the V/f
pattern is incorrect for the appli-
cation.
The setting of Motor Rated Cur-
rent (E2-01) is incorrect.
The load is too large. The acceler-
ation time or deceleration times
are too short.
The voltage settings of the V/f
pattern is incorrect for the appli-
cation.
The size of the Inverter is too
small.
Motor was overloaded.
Motor was overloaded.
The inertia of the load is too large.
Motor was underloaded.
Motor was underloaded.
Overshooting/Undershooting are
occurring.
The reference was too high.
The settings in F1-08 and F1-09
are not appropriate.
Corrective Actions
Recheck the cycle time and
the size of the load as well as
the accel/decel times
(C1- ).
Check the V/f characteristics
(E1- ).
Check the setting of Motor
Rated Current Setting (E2-01).
Recheck the cycle time and
the size of the load as well as
the accel/decel times
(C1- ).
Check the V/f characteristics
(E1- ).
Check the setting of Motor
Rated Current Setting (E2-01).
Ensure the values in L6-02
and L6-03 are appropriate.
Check application/machine
status to eliminate fault.
Ensure the values in L6-05
and L6-06 are appropriate.
Check application/machine
status to eliminate fault.
Make sure the load is an iner-
tial load.
If possible, reduce the load
inertia.
Ensure the values in L6-02
and L6-03 are appropriate.
Check application/machine
status to eliminate fault.
Ensure the values in L6-05
and L6-06 are appropriate.
Check application/machine
status to eliminate fault.
Adjust the ASR settings in the
C5 parameter group.
Check the reference circuit
and reference gain.
Check the settings in F1-08
and F1-09.
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