Emerson unidrive m200 - Input Phase Loss Detection Mode; Supply Loss Detection Level; Hold Supply Loss Active; Motor Pre-Heat Current Magnitude;Output Phase Loss Detection Time

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If CoolingFancontrol (06.045) = 5 is the same as CoolingFancontrol (06.045) = 2 but with an additional lower temperature threshold that causes the fan to run at low speed if

StackTemperature (07.004) is above the lower threshold - “theatre mode”. In some applications this may prevent the fan running at full speed and so keep the audible noise down to a

minimum. This mode is not available on size 1 and so if selected, mode 2 is used instead.

Parameter 06.047 Input Phase Loss Detection Mode

Short description Defines how the input phase loss is detected

Mode Open‑loop

Minimum 0 Maximum 2

Default 0 Units

Type 8 Bit User Save Update Rate Background read

Display Format Standard Decimal Places 0

Coding RW, TE

Value Text

0 Full

1 RIPPLE

2 diS

Input phase loss is detected by monitoring the d.c. link voltage ripple which increases with load. When compared to normal operation, if an input phase is missing or there is excessive input

phase imbalance the d.c. link ripple level is higher. The high ripple level is detected to initiate a PH.Lo trip. For drive sizes 8 and above an additional input phase loss detection is provided by

direct monitoring of the supply voltages (PH.Lo trip). Unlike the d.c. voltage ripple based detection which can only operate when the drive is enabled and on load, the additional input phase loss

detection can operate whether the drive is enabled or not. InputPhaseLossDetectionMode (06.047) defines the methods used for input phase loss detection provided by the drive.

Input Phase Loss Detection Mode (06.047) Drive Active (10.002) = 0 Drive Active (10.002) = 1

0 *Direct input phase loss detection

*Direct input phase loss detection

D.c. link voltage ripple detection

1 *Direct input phase loss detection D.c. link voltage ripple detection

2 No input phase loss detection No input phase loss detection

*Frame sizes 8 and above

Input phase loss detection can be disabled when the drive is required to operate from a d.c. supply connected to the d.c. link or from a single phase supply. If the drive operates from a single

phase supply or a supply with high levels of phase imbalanced under load the input stage and d.c. link thermal protection system may produce a OHtdcbus trip.

Parameter 06.048 Supply Loss Detection Level

Short description Defines the threshold for indicating when the supply loss condition is detected

Mode Open‑loop

Minimum 0 Maximum VM_SUPPLY_LOSS_LEVEL

Default See exceptions below Units V

Type 16 Bit User Save Update Rate Background read

Display Format Standard Decimal Places 0

Coding RW, VM, RA

Voltage Default Value

110V 205

200V 205

400V 410

575V 540

690V 540

Defines the threshold for indicating when the supply loss condition is detected.

The threshold can be adjusted to higher levels using this parameter. If the value is reduced below the default value the default value is used by the drive. If the level is set too high so that supply

loss detection becomes active under normal operating conditions, the motor will coast to a stop.

Parameter 06.051 Hold Supply Loss Active

Short description Hold Supply Loss Active

Mode Open‑loop

Minimum 0 Maximum 1

Default 0 Units

Type 1 Bit Volatile Update Rate 1ms read

Display Format Standard Decimal Places 0

Coding RW, NC

If supply loss is detected (i.e. SupplyLoss (10.015) = 1) or HoldSupplyLossActive (06.051) = 1 the supply loss indication and the action taken on supply loss will be active. For

example, HoldSupplyLossActive (06.051) can be controlled by an external rectifier or a Regen system (via a digital input) to prevent power from being taken from the supply if supply loss ride-

through mode is being used until the input system is ready to provide power. This can allow for the charge system in an external rectifier to complete the charging, or it can allow a Regen

system to become synchronised.

Parameter 06.052 Motor Pre-heat Current Magnitude

Short description Defines the current in the motor when the state machine is in the stop state

Mode Open‑loop

Minimum 0 Maximum 100

Default 0 Units %

Type 8 Bit User Save Update Rate Background read

Display Format Standard Decimal Places 0

Coding RW

See HoldZeroFrequency (06.008).

Parameter 06.058 Output Phase Loss Detection Time

Short description Output Phase Loss Detection Time