Firmware Manual

9000X AF Drives
8-52 For more information visit: www.eaton.com
MN04004001E
August 2010
Description of Parameters
504 Brake chopper 234567 (P1.4.5)
0 No brake chopper used
1 Brake chopper in use and tested when running. Can be tested also in
READY state
2 External brake chopper (no testing)
3 Used and tested in READY state and when running
4 Used when running (no testing)
When the frequency converter is decelerating the motor, the inertia of the motor and
the load is fed into an external brake resistor. This enables the frequency converter to
decelerate the load with a torque equal to that of acceleration (provided that the
correct brake resistor has been selected). See the separate Brake resistor installation
manual.
505 Start Function (P1.4.6)
Ramp:
0 The frequency converter starts from 0 Hz and accelerates to the set
reference frequency within the set acceleration time. (Load inertia or
starting friction may cause prolonged acceleration times.)
Flying start:
1 The frequency converter is able to start into a running motor by applying
a small torque to motor and searching for the frequency corresponding
to the speed the motor is running at. Searching starts from the maximum
frequency towards the actual frequency until the correct value is
detected. Thereafter, the output frequency will be increased/decreased to
the set reference value according to the set acceleration/deceleration
parameters.
Use this mode if the motor is coasting when the start command is given,
with the flying start it is possible to ride through short utility voltage
interruptions.
506 Stop Function (P1.4.7)
Coasting:
0 The motor coasts to a halt without any control from the frequency
converter, after the Stop command.
Ramp:
1 After the Stop command, the speed of the motor is decelerated
according to the set deceleration parameters. If the regenerated energy is
high it may be necessary to use an external braking resistor for faster
deceleration.
Normal stop: Ramp/ Run Enable stop: coasting
2 After the Stop command, the speed of the motor is decelerated
according to the set deceleration parameters. However, when Run
Enable is selected, the motor coasts to a halt without any control from
the frequency converter.
Normal stop: Coasting/ Run Enable stop: ramping
3 The motor coasts to a halt without any control from the frequency
converter. However, when Run Enable signal is selected, the speed of the
motor is decelerated according to the set deceleration parameters. If the
regenerated energy is high, it may be necessary to use an external
braking resistor for faster deceleration.