Omron M1 Series User Manual page 783

(5) The braking load is large.
(6) There is a ground fault on the
output side.
(7) A malfunction occurred due to
noise.
Attached in- None
formation
Precautions/ None
Remarks
M1 Series EtherCAT Type User's Manual (I670)
Compare the load's braking tor-
que with the braking torque of
the inverter.
→ Set the value of 1st rated
voltage at base frequency
(3004-06 hex) to 0 to improve the
braking performance.
→ Consider using a braking re-
sistor.
The inverter operates normally
when operated with the wires
disconnected from inverter out-
put terminals (U, V, and W).
→ Check if there is a ground
fault on the output wires or the
motor.
If overvoltage is indicated when
the inverter is operating with the
wires disconnected from the in-
verter output terminals (U, V, and
W).
→ There is a possibility of an in-
verter failure.
Check if the DC link bus voltage
at occurrence of the overvoltage
is below the set overvoltage de-
tection level.
→ Take measures against noise.
→ Enable the function of Auto-
reset Count (3008-05 hex).
→ Connect a surge absorber to
the coil, solenoid, etc. of the
electromagnetic contactor, which
is the noise source.
Appendices
Design the inverter so that the
braking torque of the inverter can
be secured for the load's braking
torque.
Confirm that the motor cables
are not broken and connect them
correctly.
Excessive noise may be generat-
ed around the inverter. Consider
taking measures against noise.
A-237
A