Parameter 31-10 Bypass Status Word
Table 726: Parameter 31-10 Bypass Status Word
31-10 Bypass Status Word
Default Value: 0
Parameter Type: Range, 0 - 65535
Setup: All set-ups
Conversion Index: 74
Data Type: V2
Change during operation: False
View the status of the bypass as a hexadecimal value.
Parameter 31-11 Bypass Running Hours
Table 727: Parameter 31-11 Bypass Running Hours
31-11 Bypass Running Hours
Default Value: 0 h
Parameter Type: Range, 0 - 2147483647 h
Setup: All set-ups
Conversion Index: 74
Data Type: Uint32
Change during operation: False
View the number of hours in which the motor has run in bypass mode. The counter can be reset in
parameter 15-07 Reset Running
Hours Counter
. The value is saved when the drive is turned off.
Parameter 31-19 Remote Bypass Activation
Table 728: Parameter 31-19 Remote Bypass Activation
31-19 Remote Bypass Activation
Default Value: [0] Disabled
Parameter Type: Option
Setup: 2 set-ups
Conversion Index: -
Data Type: Uint8
Change during operation: True
Option
Name
Description
[0]*
Disabled
[1]
Enabled
4.22 Parameter Group 40-** Special Settings
4.22.1 40-2* PM Motor Specific
Parameter 40-28 Back EMF Protection
Table 729: Parameter 40-28 Back EMF Protection
40-28 Back EMF Protection
Default Value: [1] Enabled
Parameter Type: Option
Setup: All set-ups
Conversion Index: -
Data Type: Uint8
Change during operation: False
The drive is protected by default from Back EMF, which can be generated by IPM or SPM motor types due to calculated speed limita-
tion. The actual limitation is based on
parameter 1-40 Back EMF at 1000 RPM
and protects the drive from motor-generated overvolt-
age.
C A U T I O N
By disabling the speed limitation, a risk of destructive effect on the IGBTs can be encountered when the drive loses the motor. If
the function is disabled, ensure to protect the drive by other means to prevent motor-generated overvoltage.
AU373327181955en-000101 / 130R1208
342 | Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide