Danfoss VLT AutomationDrive FC 301 Programming Manual page 720

VLT AutomationDrive FC 301/302
Programming Guide
Preset reference
Process PID
Pulse input/incremental encoder
Pulse reference
R
RCD
Ref
MAX
Ref
MIN
S
SFAVM
SLC
STW
Safe Torque Off (STO)
Setup
Slip compensation
Start-disable command
Stop command
720 | Danfoss A/S © 2022.12
I × cosϕ1
1
Power factor = =
I
RMS
The power factor indicates to which extent the drive imposes a load on the
mains supply.
The lower the power factor, the higher the I
ance.
2 2 2
I = I + I + I + .. + I
RMS 1 5 7
In addition, a high-power factor indicates that the different harmonic cur-
rents are low.
The DC coils in the drive produce a high-power factor, which minimizes the
imposed load on the mains supply.
A defined preset reference to be set from -100% to +100% of the reference
range. Selection of 8 preset references via the digital terminals.
The PID control maintains the required speed, pressure, temperature, and
so on, by adjusting the output frequency to match the varying load.
An external, digital pulse transmitter used for feeding back information on
motor speed. The encoder is used in applications where great accuracy in
speed control is required.
A pulse frequency signal transmitted to the digital inputs (terminal 29 or
33).
Residual-current device.
Determines the relationship between the reference input at 100-% full scale
value (typically 10 V, 20 mA) and the resulting reference. The maximum ref-
erence value is set in parameter 3-03 Maximum Reference.
Determines the relationship between the reference input at 0-% value (typi-
cally 0 V, 0 mA, 4 mA) and the resulting reference. The minimum reference
value is set in parameter 3-02 Minimum Reference.
Switching pattern called stator flux-oriented asynchronous vector modula-
tion (parameter 14-00 Switching Pattern).
The SLC (smart logic control) is a sequence of user-defined actions execu-
ted when the associated user-defined events are evaluated as true by the
SLC. (See parameter group 13-** Smart Logic Control).
Status word.
The STO function brings the drive safely to a no-torque state.
Save parameter settings in 4 setups. Change between the 4 parameter set-
ups and edit 1 setup, while another setup is active.
The drive compensates for the motor slip by giving the frequency a supple-
ment that follows the measured motor load keeping the motor speed al-
most constant.
A start command belonging to Group 2 control commands, see the table
Function Groups under Control Command.
A stop command belonging to Group 1 control commands, see the table
Function Groups under Control Command.
I
1
since cosϕ1 = 1
I
RMS
for the same kW perform-
RMS
2
n
AU275636650261en-000101/130R0334
Glossary