Omron M1 Series User Manual page 774

Appendices
(6) Short-circuit detection was
activated by the built-in braking
transistor (22 kW or less).
(7) The inverter malfunctioned
due to noise.
Attached in- None
formation
Precautions/ None
Remarks
A-228
Check if the braking resistor con-
nection terminals (P(+) and DB)
are short-circuited. Check if the
resistance value of the connect-
ed braking resistor is extremely
low.
→ Connect an appropriate brak-
ing resistor.
Check the measures against
noise (grounding condition, con-
trol/main circuit wiring and instal-
lation).
→ 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.
M1 Series EtherCAT Type User's Manual (I670)
Connect an appropriate braking
resistor.
Excessive noise may be generat-
ed around the inverter. Consider
taking measures against noise.