Danfoss VLT AutomationDrive EZ FC 321 Programming Manual page 127

VLT® AutomationDrive EZ FC 321
Programming Guide
Select the input source for the function in parameter 2-15 Brake Check. If several drives are carrying out a brake check simultaneous-
ly, the resistance in the grid leads to a voltage drop on the mains or DC-link and a false brake check can occur. Use an external
current sensor on every brake resistor. If an application requires a 100% valid brake check, connect the sensor to an analog input.
Option Name
[0]* DC-link voltage
[1] Analog input 53
[2] Analog input 54
Parameter 4-24 Brake Check Limit Factor
Table 235: Parameter 4-24 Brake Check Limit Factor
4-24 Brake Check Limit Factor
Default value: 98%
Conversion index: -1
Enter the limit factor that parameter 2-15 Brake Check uses when performing the brake check. The drive uses the limit factor depend-
ing on the selection in parameter 4-23 Brake Check Limit Factor Source: [0] DC-link voltage - the drive applies the factor to the EEPROM
data in the DC-link. [1] Analog Input 53 or [2] Analog Input 54 - the brake check fails if the input current on the analog input is lower
than the maximum input current multiplied by the limit factor. For example, in the following configuration the brake check fails if
the input current is lower than 16 mA:
• A current transducer with a range of 4-20 mA is connected to analog input 53.
• Parameter 4-24 Brake Check Limit Factor is set to 80%.
Parameter 4-25 Power Limit Motor Factor Source
Table 236: Parameter 4-25 Power Limit Motor Factor Source
4-25 Power Limit Motor Factor Source
Default value: [0] No function
Conversion index: –
Select the input that scales the value in parameter 4-82 Power Limit Motor Mode from 0% to 100%.
Option
[0]*
[2]
[4]
[6]
[8]
[10]
[12]
[14]
[16]
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Description
The drive performs the brake check by monitoring the DC-link voltage. The drive injects current in
the brake resistor which lowers the DC-link voltage.
Select to use an external current sensor for brake monitoring.
Select to use an external current sensor for brake monitoring
Parameter type: Range, 0 - 100%
Data type: Uint8
Parameter type: Option
Data type: Uint8
Name
No function
Analog in 53
Analog in 53 inv
Analog in 54
Analog in 54 inv
Analog in X30-11
Analog in X30-11 inv
Analog in X30-12
Analog in X30-12 inv
Parameter Descriptions
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
Description
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