Option
Name
Description
[0]
Disabled
[1]*
Enabled
Parameter 40-29 B-EMF Protection Log Readout
Table 730: Parameter 40-29 B-EMF Protection Log Readout
40-29 B-EMF Protection Log Readout
Default Value: 0
Parameter Type: Range, 0 - 65535
Setup: All set-ups
Conversion Index: 0
Data Type: Uint16
Change during operation: True
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.
4.22.2 40-4* Extend. Fault Log
Parameter 40-40 Fault Log: Ext. Reference
Table 731: Parameter 40-40 Fault Log: Ext. Reference
40-40 Fault Log: Ext. Reference
Default Value: 0%
Parameter Type: Range, -200 - 200%, Array [10]
Setup: All set-ups
Conversion Index: -1
Data Type: Int16
Change during operation: False
View the present reference value applied on impulse or analog basis when the logged event occurred.
Parameter 40-41 Fault Log: Frequency
Table 732: Parameter 40-41 Fault Log: Frequency
40-41 Fault Log: Frequency
Default Value: 0 Hz
Parameter Type: Range, 0 - 6500 Hz, Array [10]
Setup: All set-ups
Conversion Index: -1
Data Type: Uint16
Change during operation: False
View the actual motor frequency value when the logged event occurred.
Parameter 40-42 Fault Log: Current
Table 733: Parameter 40-42 Fault Log: Current
40-42 Fault Log: Current
Default Value: 0 A
Parameter Type: Range, 0 - 10000 A, Array [10]
Setup: All set-ups
Conversion Index: -2
Data Type: Int32
Change during operation: False
View the motor current measured when the logged event occurred.
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Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide