1-86 Programming Your Application
690+ Series Frequency Inverter
POWER LOSS CNTRL
Designed for all Motor Control Modes.
This function block controls the behaviour of
the drive during a power outage
When enabled, the drive attempts to keep the
dc link high by regeneratively recovering the
kinetic energy in the motor load in the event
of mains supply loss.
This is achieved by ramping the speed
setpoint to zero during the power outage. If during the outage the supply returns, the speed
setpoint is automatically ramped back to the speed setpoint.
When disabled, the drive will trip on UNDERVOLTS if the mains supply is removed.
Power Loss Cntrl
–
PWR LOSS ACTIVE [1271]
–
FALSE
FALSE
–
[1265] ENABLE
–
** 447V
–
[1266] TRIP THRESHOLD
–
20V
–
[1267] CONTROL BAND
–
10.00s
–
[1268] ACCEL TIME
–
5.00s
–
[1269] DECEL TIME
–
0.00%
–
[1677] INITIAL STEP
–
30.00s
–
[1270] TIME LIMIT
–
Parameter Descriptions
ENABLE
Range: FALSE / TRUE
When TRUE, the Power Loss Ride-Through functionality is enabled.
TRIP THRESHOLD
Range: 0V to 1000V
Determines the dc link volts at which the Power Loss Ride-Through sequence is triggered.
CONTROL BAND
Range: 0V to 1000V
Sets the dc link voltage above the TRIP THRESHOLD at which the setpoint Ramp to Stop is
aused. If the dc link volts remain above this level for a period greater than 500ms, the setpoint
is ramped back to the speed demand.
ACCEL TIME
Range: 0.01 to 300.00s
Determines the time in which the speed setpoint is ramped back to the speed demand. This is
expressed as the time to ramp from zero to MAX SPEED.
DECEL TIME
Range: 0.01 to 300.00s
Determines the time in which the speed setpoint is ramped to zero. This is expressed as the
time to ramp from MAX SPEED to zero.
INITIAL STEP
Range: 0.00 to 100.00%
This parameter sets the initial speed reduction step at the start of the power loss control
sequence.
TIME LIMIT
Range: 0.00 to 300.00s
Determines the maximum allowed time of the Power Loss Ride-Through sequence. Once
timeout is reached, the drive is allowed to Coast to Stop and eventually trip on
UNDERVOLTS.
PWR LOSS ACTIVE
Range: FALSE / TRUE
This diagnostic is set to TRUE while the Power Loss Ride-Through sequence is active.
MMI Menu Map
1
SETUP
2
MOTOR CONTROL
POWER LOSS CNTRL
To Next Page
Loading...
