Danfoss VLT CANopen MCA 105 Programming Guide

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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
Description
[0]*
DC-link voltage
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.
[1]
Analog input 53
Select to use an external current sensor for brake monitoring.
[2]
Analog input 54
Select to use an external current sensor for brake monitoring
Parameter 4-24 Brake Check Limit Factor
Table 274: Parameter 4-24 Brake Check Limit Factor
4-24 Brake Check Limit Factor
Default value: 98%
Parameter type: Range, 0 - 100%
Setup: All setups
Conversion index: -1
Data type: Uint8
Change during operation: True
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 275: Parameter 4-25 Power Limit Motor Factor Source
4-25 Power Limit Motor Factor Source
Default value: [0] No function
Parameter type: Option
Setup: All setups
Conversion index: –
Data type: Uint8
Change during operation: True
Select the input that scales the value in parameter 4-82 Power Limit Motor Mode from 0% to 100%.
Option
Name
Description
[0]*
No function
[2]
Analog in 53
[4]
Analog in 53 inv
[6]
Analog in 54
[8]
Analog in 54 inv
[10]
Analog in X30-11
[12]
Analog in X30-11 inv
[14]
Analog in X30-12
[16]
Analog in X30-12 inv
AU275636650261en-000101 / 130R0334158 | Danfoss A/S © 2022.12
Parameter Descriptions
VLT AutomationDrive FC 301/302
Programming Guide

Danfoss VLT CANopen MCA 105 Specifications

General

Brand	Danfoss
Model	VLT CANopen MCA 105
Category	DC Drives
Language	English