Danfoss VLT AutomationDrive FC 301 Programming Manual page 664

VLT AutomationDrive FC 301/302
Programming Guide
Parameter 40-29 B-EMF Protection Log Readout
Table 1355: Parameter 40-29 B-EMF Protection Log Readout
40-29 B-EMF Protection Log Readout
Default value: 0
Conversion index: 0
Readout parameter to log events if the Back EMF has been enabled or disabled. The range of the readout parameter is between [0x0
-0xFFFF] hex. The value indicates the bit pattern to identify the current state of Back EMF in the drive. Bit 1 is set: When Back EMF is
enabled, the bit is set to 1. Once enabled the Back EMF cannot be reversed. Bit 1 and bit 2: Motor frequency exceeded Back EMF
limitation. Bit 2 can be reversed. Bit 1, bit 2, and bit 3: The drive has been coasted as motor frequency exceeded the Back EMF limita-
tion. Bit 1, bit 2, bit 3, bit 4: The drive has generated an overvoltage alarm because the drive has coasted as the motor frequency
exceeded Back EMF limitation.
5.30.3 40-4* Extend. Fault Log
Parameters in this group are array parameters, where up to 10 alarm logs can be viewed. [0] is the most recently logged data and [9]
is the oldest. This parameter group provides details on reference, frequency, motor current, voltage, DC-link voltage, status, and
control word values at the time an alarm occurred.
Parameter 40-40 Fault Log: Ext. Reference
Table 1356: Parameter 40-40 Fault Log: Ext. Reference
40-40 Fault Log: Ext. Reference
Default value: 0%
Conversion index: -1
View the present reference value applied on impulse or analog basis when the logged event occurred.
Parameter 40-41 Fault Log: Frequency
Table 1357: Parameter 40-41 Fault Log: Frequency
40-41 Fault Log: Frequency
Default value: 0 Hz
Conversion index: -1
View the actual motor frequency value when the logged event occurred.
Parameter 40-42 Fault Log: Current
Table 1358: Parameter 40-42 Fault Log: Current
40-42 Fault Log: Current
Default value: 0 A
Conversion index: 0
View the motor current measured when the logged event occurred.
Parameter 40-43 Fault Log: Voltage
Table 1359: Parameter 40-43 Fault Log: Voltage
40-43 Fault Log: Voltage
Default value: 0 V
Conversion index: 0
View the motor voltage when the logged event occurred.
664 | Danfoss A/S © 2022.12
Parameter type: Range, 0 - 65535
Data type: Uint16
Parameter type: Range, -200 - 200%, Array [10]
Data type: Int16
Parameter type: Range, 0 - 6500 Hz, Array [10]
Data type: Uint16
Parameter type: Range, 0 - 10000 A, Array [10]
Data type: Int32
Parameter type: Range, 0 - 6000 V, Array [10]
Data type: Uint16
Parameter Descriptions
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: False
Setup: All setups
Change during operation: False
Setup: All setups
Change during operation: False
Setup: All setups
Change during operation: False
AU275636650261en-000101 / 130R0334