Panasonic MINAS A6 Multi Series Technical Reference page 302

PSM
alarm
PSM alarm name
number
06 PSM main power supply
overcurrent alarm
07 PSM regenerative
overload alarm
When setting PSM Pr.00 "Regenerative operation setting" to 2, be sure to install external protection such as a thermal fuse.
The regenerative resistor and transistor may not be protected, and the regenerative resistor and transistor may overheat and
burn out.
MINAS A6 Multi cannot be used for continuous regenerative braking.
08 PSM regenerative
transistor alarm
09 PSM regenerative
resistor monitoring alarm
(To be continued)
Cause of alarm
Abnormal current continuously flows to the
main power supply DC bus of the power supply
module in the main power supply established
state.
1) The total output of all motors of the driver
module connected to the power supply
module is excessive.
2) Short circuit of main power supply DC bus. 2) Check the high-voltage power supply bus
3) Power supply module failure:
Related circuit is broken
Regenerative energy exceeded the capacity of
regenerative resistance.
1) The voltage of the converter rises due to
regenerative energy during deceleration
due to a large load inertia, and the voltage
further rises due to insufficient energy
absorption by the regenerative resistor.
Because the motor speed is high, the
regenerative energy cannot be absorbed
in a predetermined deceleration time.
2) The regenerative overload protection
function limits the operating limit of the
external resistor to 10% duty.
Failure of the regenerative drive transistor of
the power supply module.
The regenerative resistor overheat protection
input (DIN2/COM2) of the power supply module
has become an abnormal side.
1) The regenerative resistance temperature
has reached the overheat protection level.
2) Regenerative resistor overheat protection
input (DIN2/COM2) is disconnected.
3) Incorrect logic setting of regenerative
resistor overheat protection input
(DIN2/COM2).
4) Power supply module failure:
Related circuit is broken.
Power Supply Module
Measures of alarm
Reduce the load current of the main power
supply DC bus.
1) The power supply module checks the
operation pattern of all motors connected to
the driver module that supplies power, and
reduces the load.
Decrease the acceleration time.
Reduce the motor speed.
bar connection between the power supply
module and the driver module.
3) Replace the power supply module.
Reduce regenerative energy.
Increase regeneration capacity.
1) The power supply module checks the
operation pattern of all motors connected to
the driver module that supplies power, and
reduces the load.
Decrease the deceleration time.
Reduce the motor speed.
Change to a regenerative resistor with high
regenerative processing capability.
Increased power supply module capacity.
2) Set PSM Pr.00 "Regenerative operation
setting" to 2 (An external resistor is used,
but regenerative overload protection is not
executed)
Replace the power supply module.
Take measures to make the regenerative
resistor overheat protection input (DIN2/COM2)
normal.
1) Change to a regenerative resistor with high
regenerative processing capability.
2) Check the wiring between the regenerative
resistor and the power supply module.
3) Change bit1 "DIN2 logic setting" of PSM
Pr.05 "Regenerative resistance
temperature monitoring setting".
4) Replace the power supply module.
11-12