Omron VARISPEED E7 User Manual page 255

Display
7
4
7-
Meaning
Motor Overload
The motor overload protection
function has operated based on the
internal electronic thermal value.
Inverter Overload
The Inverter overload protection
function has operated based on the
internal electronic thermal value.
Overtorque Detected 1
There has been a torque higher
than the setting in L6-02 for longer
than the time in L6-03.
High-slip Braking OL
The output frequency did not
change for longer than the time set
in N3-04.
Undertorque Detected 1
There has been a torque lower than
the setting in L6-02 for longer than
the time in L6-03.
PI Feedback Lost
A PI feedback loss detection is
enabled (b5-12 ≠ 0) and the PI
feedback input was less than b5-13
(PI feedback loss detection level)
for longer than the time set in b5-
14 (PI feedback loss detection
time).
External fault input from Commu-
nications Option Card
External fault (Input terminal 3)
External fault (Input terminal 4)
External fault (Input terminal 5)
External fault (Input terminal 6)
External fault (Input terminal 7)
Digital Operator Connection Fault
The connection to the Digital
Operator was broken during opera-
tion using the operator as RUN
command source.
Probable Causes
The load is too heavy. The accelera-
tion time, deceleration time, and cycle
time are too short.
The V/f characteristics voltage is too
high or too low.
The Motor Rated Current (E2-01) is
incorrect.
The load is too heavy. The accelera-
tion time, deceleration time and cycle
time are too short.
The V/f characteristics voltage is too
high or too low.
The Inverter capacity is too low.
–
The inertia of the connected machine
is too large.
–
–
–
An "external fault" was input from a
multi-function input terminal (S3 to
S7).
–
Corrective Actions
Check the size of the load and the
length of the acceleration, deceler-
ation, and cycle times.
Check the V/f characteristics.
Check the Motor Rated Current
Setting (E2-01).
Check the size of the load and the
length of the acceleration, deceler-
ation, and cycle times.
Check the V/f characteristics.
Replace the Inverter with one that
has a larger capacity.
• Make sure that the settings in
L6-02 and L6-03 are appropri-
ate.
• Check the mechanical system
and correct the cause of the
overtorque.
Make sure the load is an inertial
load.
• Make sure that the settings in
L6-02 and L6-03 are appropri-
ate.
• Check the mechanical system
and correct the cause of the
undertorque.
• Check the PI feedback signal
source for correct operation.
• Check the wiring.
Check the Communications
Option Card and communications
signals.
Remove the cause of the external
fault.
Check the connection to the Digi-
tal Operator.