Max Output Frequency; Torque Limit Factor Source; Speed Limit Factor Source; Brake Check Limit Factor - Danfoss VLT AutomationDrive FC 302 Programming Manual

Parameter Descriptions

4-19 Max Output Frequency

Range: Function:
NOTICE
Size [ 1 -
related 590
*
This parameter cannot be adjusted
Hz]
while the motor is running.
NOTICE
Maximum output frequency cannot
exceed 10% of the inverter switching
frequency (parameter 14-01 Switching
Frequency).
Provides a final limit on the output frequency
for improved safety in applications where
overspeeding is to be avoided. This limit is
final in all configurations (independent of the
setting in parameter 1-00 Configuration Mode).

4-20 Torque Limit Factor Source

Option: 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.
[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: 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
MG33MP02
Programming Guide
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
[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:
[0]
*
[1]
[2]

4-24 Brake Check Limit Factor

Range:
98
% 100 %
*
]
Danfoss A/S © 10/2018 All rights reserved.
Function:
parameter 1-00 Configuration Mode is in
[4] Torque Open Loop.
Function:
DC-link voltage The frequency converter
performs the brake check by
monitoring the DC-link
voltage. The frequency
converter injects current in
the brake resistor which
lowers the DC-link voltage.
Analog Input 53 Select to use an external
current sensor for brake
monitoring.
Analog Input 54 Select to use an external
current sensor for brake
monitoring.
Function:
[0 - 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.
3 3
89