
8. TROUBLESHOOTING
B–62755EN/01
362
This alarm is lit when the transistor for regenerative discharging turns on
more than 1 second.
Its causes are;
1) Mulfunction of servo amplifier such as regenerative discharge circuit.
2) Regenerative discharge energy is excessive due to cutting conditions.
This alarm is lit when regenerative discharge registance is overheated and
the thermost operates.
Its causes are ;
1) Average discharge energy is excessive due to frequent acc./dec. or no
use of balancer in vertical axis
2) Functioning of a thermostat in the power transformer when thermostat
signal TH1 and TH2 are connected.
When turning on MCC, if the contacts are already on.
When you open the cover of the terminal board, you can see the check
terminal below LED.
Terminal name Meaning
OV 0V
5V Control power +5V(+5"0.25)
IRL R–phase motor current of L axis
ISL S–phase motor current of L axis
IRM R–phase motor current of M axis
ISM S–phase motor current of M axis
Type of unit A/V Type of unit (A/V)
A06B–6066–H002 1 A06B–6066–H222 1/1
Left side L axis/Right
A06B–6066–H003 3 A06B–6066–H223 1/3
A06B–6066–H004 10 A06B–6066–H224 1/10
A06B–6066–H006 20 A06B–6066–H233 3/3
A06B–6066–H234 3/10
A06B–6066–H244 10/10
D DCSW alarm
D DCOH alarm
D MCC alarm
D Check terminals on
servo amp.
D Terminal name and
meaning
D Current/volt