Power Loss (Menu Index 2.3.3) - Danfoss iC7 Series Application Manual

Application Guide | iC7 Series Industry

Power Loss (Menu Index 2.3.3)

6.3.4.3
P 2.3.3.3 Power Loss Response
Select the response to an insufficient supply voltage.
Default Value: 1 (Undervoltage control)
Parameter
1818
Number:
Data Type:
UINT
The following are the selections for the parameter.
Selection Number Selection Name
0 None
1 Undervoltage control
2 Controlled ramp down
3 Coast
This parameter sets the reaction of the drive when the drive has insufficient supply voltage (DC-link voltage). Insufficient voltage is
detected when the actual voltage falls below the undervoltage limit.
Table 32: Selection Descriptions
Selection name
None
Undervoltage control
Controlled Ramp Down
Coast
P 2.3.3.4 Power Recovery Response
Select the action to take when supply voltage returns after a power loss.
Default Value: 0 (Ramp to reference)
Parameter 1819
Number:
Data Type: UINT
The following are the selections for the parameter.
© 2024.05
Selection description
During a power loss scenario, the drive takes no action. The undervoltage controlled is disabled.
• When the voltage falls below the undervoltage level, the undervoltage controller is activated.
• The controller decelerates the motor speed to regenerate energy to DC-link.
• Use this selection for system module drives.
When the voltage falls below the undervoltage level, the drive stops by ramping the motor speed
to zero before stopping modulation.
When the voltage falls below the undervoltage level, the drive immediately stops modulating.
Parameter Type:
Unit:
Access Type:
Selection Description
The function is disabled.
Drive utilizes the kinetic energy in the system to maintain
operation as long as possible.
Drive utilizes the kinetic energy in the system to perform a
controlled ramp down.
Drive coasts the motor.
Parameter Type:
Unit:
Access Type:
AB480436531518en-000601 / 136R0283 |
Parameter Descriptions
Selection
–
Read/Conditional Write
Selection
–
Read/Conditional Write
101