Omron M1 Series User Manual page 763

Alarm
Alarm
sub-
code
code
(0Un)
(PbF)
M1 Series Standard Type User's Manual (I669)
Name Description
(3) Short deceleration
time for the moment of
inertial of the load.
(4) Short acceleration
time
(5) High braking load
Overvoltage
(6) Output has a ground
fault
(7) Malfunction be-
cause of noise
Charging circuit (1) The charging circuit
malfunction (1.5 is damaged
kW min.)
9 Troubleshooting
Check point and remedy reference
Recalculate the deceleration torque from the
moment of inertia of the load and the decel-
eration time.
→ Lengthen the deceleration time (F08,
E11, E13, E15, H56).
→ Enable Anti-regenerative Control Func-
tion Selection (H69) or Over-Excitation
Control Selection during Deceleration
Function Selection (H71).
→ Enable torque limit (F40, F41, E16,
E17).
→ Set 1st Rated Voltage at Base Fre-
quency (F05*) to 0, and increase brak-
ing performance.
→ Consider use of braking resistor.
Check if an overvoltage alarm occurs at the
end of sudden acceleration.
→ Lengthen the acceleration time (F07,
E10, E12, E14).
→ Use Acceleration/Deceleration Pattern
Selection (H07).
→ Consider use of braking resistor.
Compare load braking torque and inverter
braking torque.
→ Set 1st Rated Voltage at Base Fre-
quency (F05*) to 0, and increase brak-
ing performance.
→ Consider use of braking resistor.
If this operates correctly when run with wiring
removed from the inverter output terminal (U,
V, W).
→ Check that the output wiring or the mo-
tor do not have a ground fault.
If an overvoltage is displayed when run with
wiring removed from the inverter output ter-
minal (U, V, W).
→ This indicates an inverter fault possibili-
ty. Please contact OMRON.
Check that the Main Circuit DC Voltage at
the time of overvoltage is at or below the
overvoltage level.
→ Implement measures against noise.
→ Enable Retry Count at Trip (H04).
→ Connect a surge absorber to coils, sol-
enoids, etc. in magnetic contactors that
are the cause of noise.
Repair of the inverter is required.
→ Please contact OMRON.
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