Danfoss VLT AutomationDrive FC 301 Programming Manual page 106

Parameter Descriptions
4-20 Torque Limit Factor Source
Option:
3 3
[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
4-21 Speed Limit Factor Source
Option:
[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
104
®
VLT AutomationDrive FC 301/302
Function:
Select an analog input for scaling
the settings in
parameter 4-16 Torque Limit Motor
Mode and parameter 4-17 Torque
Limit Generator Mode 0–100% (or
inverse). The signal levels
corresponding to 0% and 100% are
defined in the analog input scaling,
for example parameter group 6-1*
Analog Input 1. This parameter is
only active when
parameter 1-00 Configuration Mode
is in Speed Open Loop or Speed
Closed Loop.
Function:
Select an analog input for scaling
the settings in parameter 4-19 Max
Output Frequency 0–100% (or the
other way around). The signal levels
corresponding to 0% and 100% are
defined in the analog input scaling,
for example parameter group 6-1*
Analog Input 1. This parameter is
only active when
parameter 1-00 Configuration Mode
is in [4] Torque Open Loop.
Danfoss A/S © 10/2019 All rights reserved.
4-21 Speed Limit Factor Source
Option: Function:
[12] Analog in
X30-11 inv
[14] Analog in
X30-12
[16] Analog in
X30-12 inv
4-23 Brake Check Limit Factor Source
Select the input source for the function in parameter 2-15 Brake
Check. If several frequency converters are carrying out a brake
check simultaneously, 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: Function:
[0] DC-link The frequency converter performs
*
voltage the brake check by monitoring the
DC-link voltage. The frequency
converter injects current in the
brake resistor which lowers the DC-
link voltage.
[1] Analog Input Select to use an external current
53 sensor for brake monitoring.
[2] Analog Input Select to use an external current
54 sensor for brake monitoring.
4-24 Brake Check Limit Factor
Range: Function:
98 % [0 - 100 %] Enter the limit factor that
*
parameter 2-15 Brake Check uses
when performing the brake check.
The frequency converter uses the
limit factor depending on the
selection in parameter 4-23 Brake
Check Limit Factor Source:
[0] DC-link voltage - the frequency
converter 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
M0013101