Omron SYSDRIVE 3G3RV, User Manual

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7
-2
Protective and Diagnostic Functions
This
section describes the alarm functions of the Inverter. The alarm functions include fault detection,
alarm
detection, operation error detection, and autotuning error detection.
K K K K
Fault Detection
When
the Inverter detects a fault, the fault contact output operates, and the Inverter output is shut OFF causing
the
motor to coast to a stop. (The stopping method can be selected for some faults, and the selected stopping
method
will be used with these faults.) A fault code is displayed on the Digital Operator.
When
a fault has occurred, refer to the following table to identify and correct the cause of the fault.
Use
one of the following methods to reset the fault after restarting the Inverter:
• Set
a multi-function contact input (H1-01 to H1-05) to 14 (Fault Reset) and turn ON the error reset signal.
• Press
the RESET Key on the Digital Operator.
• Turn
the main circuit power supply OFF and then ON again.
Table 7.1 Fault Displays and Processing
Display Meaning Probable Causes Corrective Actions
Over
Current
Overcurrent
The
Inverter output current exceeded
the
overcurrent detection level. (200%
of
rated current)
• A
short-circuit or ground fault
occurred
at the Inverter output. (A
short
or ground fault can be caused
by
motor burn damage, worn insu-
lation,
or a damaged cable.)
• The
load is too large or the accelera-
tion/deceleration
time is too short.
• A
special-purpose motor or motor
with
a capacity too large for the
Inverter
is being used.
• A
magnetic switch was switched at
the
Inverter output.
Reset
the fault after correcting its
cause.
Ground
Fault
Ground Fault
The
ground fault current at the
Inverter
output exceeded approxi-
mately
50% of the Inverter rated out-
put
current.
A
ground fault occurred at the Inverter
output.
(A ground fault can be caused
by
motor burn damage, worn insula-
tion,
or a damaged cable.)
Reset
the fault after correcting its
cause.
DC
BUS
Fuse
Open
Fuse Blown
The
fuse in the main circuit is blown.
The
output transistor has failed
because
of a short-circuit or ground
fault
at the Inverter output.
Check
whether there is a short-circuit
between
the following terminals. A
short-circuit
will damage the output
transistor:
B1
( 3) U, V, W
U, V, W
Replace
the Inverter after correct-
ing
the cause.
DC
Bus
Overvolt
Main Circuit Overvoltage
The
main circuit DC voltage exceeded
the
overvoltage detection level.
200
V class: Approx. 410 V
400
V class: Approx. 820 V
The
deceleration time is too short and
the
regenerative energy from the
motor
is too large.
Increase
the deceleration time or
connect
a braking resistor (or
Braking
Resistor Unit).
The
power supply voltage is too high.
Decrease
the voltage so it's within
specifications.