Emerson Powerdrive F300 Reference Manual page 85

Value Text
0 Coast
1 Ramp
2 Ramp dc I
3 dc I
4 Timed dc I
Stopping is in two distinct phases as shown in the table below for each of the possible values of Stop Mode (06.001).
Stop Mode
Phase 1
(06.001)
0: Coast Inverter disabled
1: Ramp Ramp down to zero frequency
2: Ramp
followed by d.c. Ramp down to zero frequency
injection
3: D.c. injection
Low frequency current injection with detection
with zero speed
of low speed before next phase
detection
Inject d.c. at a level defined by
4: Timed d.c.
Injection Braking Level (06.006) for a time
injection stop
defined by Injection Braking Time (06.007)
5: Disable Inverter disabled
The following should be noted:
1. Once phase 1 has begun with Stop Mode (06.001) = 3 or 4 the stopping sequence must be completed or terminated by de-activating the Final
drive disable or because the drive has tripped.
2. If Stop Mode (06.001) = 5 the drive can be disabled and re-enabled immediately if the Final drive run is de-activated to stop the drive. If the
Final drive enable is used to stop the drive then there is a 1s delay before the drive can be re-enabled.
Parameter 06.003 Supply Loss Mode
Short description Defines the behaviour of the drive when the supply voltage is reduced
Mode Open‑Loop
Minimum 0
Default 0
Type 8 Bit User Save
Display Format Standard
Coding RW, TE
Value Text
0 Disable
1 Ramp Stop
2 Ride Thru
If Supply Loss Mode (06.003) > 0 and the D.c. Bus Voltage (05.005) falls below Supply Loss Detection Level (06.048) - 0.05 x
VM_SUPPLY_LOSS_LEVEL[MIN] then the supply loss condition is detected and Supply Loss (10.015) = 1. If the supply subsequently rises above
Supply Loss Detection Level (06.048) + 0.05 x VM_SUPPLY_LOSS_LEVEL[MIN] then the supply loss condition is no longer active and Supply Loss
(10.015) = 0.
0: Disable
No supply loss detection is provided by monitoring the D.c. Bus Voltage (05.005). The drive will continue to operate normally unless the under voltage
condition is detected.
1: Ramp Stop
The action taken by the drive is the same as for ride through mode, except that the ramp down rate is at least as fast as the currently selected
deceleration ramp and the drive will continue to decelerate and stop even if the supply is re-applied. If Stop Mode (06.001) = 3 or 4 (i.e. d.c. injection) the
drive will use ramp mode to stop on loss of the supply. If Stop Mode (06.001) = 2 (i.e. ramp stop followed by injection) the drive will ramp to a stop and
then attempt to apply d.c. injection. Once the sequencer state machine has reached the DISABLE state, it will be necessary to disable and re-enable the
drive for it to run again because bit 2 of Enable Conditions (06.010) is set when the sequencer state machine changes from the DECELERATION state.
2: Ride through
The drive attempts to control the d.c. link voltage to take energy from the motor and load inertia to ride through the Supply loss condition for as long as
possible.
Parameter 06.006 Injection Braking Level
Short description Defines the level of current used for injection braking
Mode Open‑Loop
Minimum 0.0
Default 100.0
Type 16 Bit User Save
Display Format Standard
Coding RW, RA
Powerdrive F300 Parameter Reference Guide
Issue: 01.15.00
Phase 2
Drive cannot be re-enabled for 1s
Wait for 1s with inverter enabled
Inject d.c. at a level defined by
Injection Braking Level (06.006) for a time
defined by Injection Braking Time (06.007)
Inject d.c. at a level defined by
Injection Braking Level (06.006) for a time
defined by Injection Braking Time (06.007)
No phase 2
No phase 2
Maximum 2
Units
Update Rate Background read
Decimal Places 0
Maximum 150.0
Units %
Update Rate Background read
Decimal Places 1
Phase 3
Delay in phase 2 allows rotor flux to
decay
The drive automatically senses low
speed and adjusts the injection time
to suit the application
Allows drive to be disabled then re-
enabled immediately
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