Emerson unidrive m200 - Injection Braking Level; Injection Braking Time; Hold Zero Frequency; Catch a Spinning Motor;Enable Conditions

Start/StopLogicSelect (06.004), EnableSequencerLatching (06.040), DigitalIO2Source/DestinationA (08.022), DigitalInput03DestinationA (08.023) and DigitalInput04DestinationA
(08.024) are also saved when this parameter is modified. Action will only occur if the drive is inactive. If the drive is active the parameter will return to its pre altered value on exit from edit mode.
In mode 6 the user is free to assign the terminals as appropriate to their application.
Parameter 06.006 Injection Braking Level
Short description Defines the level of current used for injection braking
Mode Open‑loop
Minimum 0.0 Maximum 150.0
Default 100.0 Units %
Type 16 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 1
Coding RW, RA
InjectionBrakingLevel (06.006) defines the level of current used for injection braking as a percentage of MotorRatedCurrent (05.007).
Parameter 06.007 Injection Braking Time
Short description
Defines the time during which d.c. current is injected into the motor during stopping with injection
stopping modes
Mode Open‑loop
Minimum 0.0 Maximum 100.0
Default 1.0 Units s
Type 16 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 1
Coding RW
InjectionBrakingTime (06.007) defines the time during which d.c. current is injected into the motor during stopping with injection stopping modes. See StopMode (06.001).
Parameter 06.008 Hold Zero Frequency
Short description Set to 1 to hold the motor at zero frequency
Mode Open‑loop
Minimum 0 Maximum 1
Default 0 Units
Type 1 Bit User Save Update Rate 16ms
Display Format Standard Decimal Places 0
Coding RW
If HoldZeroFrequency (06.008) = 0 the sequencer state machine goes to the DISABLE state and the inverter is disabled when the Final drive run is de-activated and the motor reaches
standstill.
If HoldZeroFrequency (06.008) = 1 and MotorPre-heatCurrentMagnitude (06.052) = 0% the sequencer state machine goes to the STOP state when the Final drive run is de-activated and the
motor reaches standstill. The drive remains enabled with a frequency reference of zero. If MotorPre-heatCurrentMagnitude (06.052) is set to a non-zero value it defines the current in the
motor when the sequencer state machine is in the STOP state. This is intended for applications where there is no motor load at standstill, but motor current is required to prevent condensation
in the motor when it is stopped. If the motor is not force cooled the motor cooling is less effective at standstill than when the motor is rotating, and so care should be taken not to damage the
motor by leaving it at standstill for prolonged periods with a high level of current.
When in HEAT mode i.e. MotorPre-heatCurrentMagnitude (06.052) is a non-zero value, the current used is a percentage of the motor rated current.
Parameter 06.009 Catch A Spinning Motor
Short description Defines the behaviour of the drive when the drive is enabled whilst the motor is rotating
Mode Open‑loop
Minimum 0 Maximum 3
Default 0 Units
Type 8 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW, TE
Value Text
0 diS
1 Enable
2 Fr.Only
3 Rv.Only
If CatchASpinningMotor (06.009) = 0 the PostRampReference (02.001) is set to zero when the drive is started. This is suitable for applications where the motor is at standstill or rotating at a
low speed when the drive is enabled.
If CatchASpinningMotor (06.009) > 0 a test is carried out to measure the frequency of the motor when the sequencer state machine enters the RUN state. The minimum time for the test is
approximately 250ms, but this may be extended as time is allowed for the motor flux to build up based on the setting of the motor parameters including MotorRatedSpeed (05.008) which
should be set to approximately the correct value. The measured frequency is used to preset the PostRampReference (02.001) and give a smooth start even if the motor is already spinning.
The test is not carried out if the Final drive run is activated when the sequencer state machine is in the STOP state or if a stator resistance measurement is carried out when the drive is enabled
(see Open-loopVoltageMode (05.014)). For the test to be successful it is important that the motor parameters, especially the StatorResistance (05.017), are set up correctly even if fixed boost
mode is selected with Open-loopVoltageMode (05.014). For larger motors it may also be necessary for SpinStartBoost (05.040) to be increased from its default value of 1.0.
Restrictions can be placed on the direction of movement and the possible direction of the detected frequency as given in the table below.
Catch A Spinning Motor (06.009) Function
0 Catch a spinning motor disabled
1 Detect all possible frequencies
2 Detect positive frequencies only
3 Detect negative frequencies only
Parameter 06.010 Enable Conditions
Short description Displays all the conditions needed to change the state of the final drive enable
Mode Open‑loop
Minimum
0
(Display: 000000000000)
Maximum
4087
(Display: 111111110111)
Default Units
Type 16 Bit Volatile Update Rate 4ms
Display Format Binary Decimal Places 0
Coding RO, ND, NC, PT
The Final drive enable is a combination of the HardwareEnable (06.029), DriveEnable (06.015) and other conditions that can prevent the drive from being enabled. All of these conditions are
Unidrive M200 Parameter Reference Guide
Issue: 01.05.00.10
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