Danfoss VLT AutomationDrive FC 300 Programming Manual page 9

1 Introduction
Smart Logic Control (SLC)
The SLC is a sequence of user defined actions executed when the associated user defined events are evaluated as true by the Smart Logic Controller.
1
(Parameter group 13-** Smart Logic Control (SLC).
STW
Status Word
FC Standard Bus
Includes RS 485 bus with FC protocol or MC protocol. See par. 8-30
Thermistor:
A temperature-dependent resistor placed where the temperature is to be monitored (frequency converter or motor).
Trip
A state entered in fault situations, e.g. if the frequency converter is subject to an over-temperature or when the frequency converter is protecting the
motor, process or mechanism. Restart is prevented until the cause of the fault has disappeared and the trip state is cancelled by activating reset or, in
some cases, by being programmed to reset automatically. Trip may not be used for personal safety.
Trip Locked
A state entered in fault situations when the frequency converter is protecting itself and requiring physical intervention, e.g. if the frequency converter is
subject to a short circuit on the output. A locked trip can only be cancelled by cutting off mains, removing the cause of the fault, and reconnecting the
frequency converter. Restart is prevented until the trip state is cancelled by activating reset or, in some cases, by being programmed to reset automatically.
Trip may not be used for personal safety.
VT Characteristics
Variable torque characteristics used for pumps and fans.
plus
VVC
If compared with standard voltage/frequency ratio control, Voltage Vector Control (VVC
reference is changed and in relation to the load torque.
60° AVM
Switching pattern called 60°Asynchronous Vector Modulation (par. 14-00
Power Factor
The power factor is the relation between I
The power factor for 3-phase control:
The power factor indicates to which extent the frequency converter im-
poses a load on the mains supply.
The lower the power factor, the higher the I
formance.
In addition, a high power factor indicates that the different harmonic currents are low.
The frequency converters' built-in DC coils produce a high power factor, which minimizes the imposed load on the mains supply.
1.1.5 Safety Precautions
The voltage of the frequency converter is dangerous whenever connected to mains. Incorrect installation of the motor, frequency
converter or fieldbus may cause death, serious personal injury or damage to the equipment. Consequently, the instructions in this
manual, as well as national and local rules and safety regulations, must be complied with.
Safety Regulations
1. The mains supply to the frequency converter must be disconnected whenever repair work is to be carried out. Check that the mains supply has
been disconnected and that the necessary time has elapsed before removing motor and mains supply plugs.
2. The [OFF] button on the control panel of the frequency converterr does not disconnect the mains supply and consequently it must not be used
as a safety switch.
8
Protocol
.
Switching Pattern
and I .
1 RMS
for the same kW per-
RMS
®
MG.33.M8.02 - VLT
plus
) improves the dynamics and the stability, both when the speed
).
x U x I cos
3
1
Power factor =
3 x U x I RMS
I
I x cos
1 ϕ1 1
since cos
= =
I RMS I RMS
2 + 2 + 2 + .. +
I RMS I I I
=
1 5 7
is a registered Danfoss trademark
FC 300 Programming Guide
ϕ
ϕ1 = 1
2
I n