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F4-S Instuction Manual
P O W E R T R A N S M I S S I O N
4.
Glossary
Analog/Digital Common
EMC
Energy-Saving Function
Frequency-dependent Switch
Actual Value
LA-Stop
RS232/485
Set Value
Speed Search
Stall
Glossary
The F4-S inverter has potential separated (galvanically isolated)
digital inputs and power supply. With this design, electrical noise
and leakage currents are greatly reduced. As a result, the digital
common (6) serves as a reference for the power supply and all
digital inputs. The analog common (9) serves only as a common
for the analog signals. For best results, it is important to avoid
connecting these two commons together.
Electro- magnetic compatibility, guidelines for reducing high
frequency interference caused by the inverter.
When motors are running under "no-load" conditions, the voltage
can be reduced, and as a result energy can be saved.
Relay or transistor output that activates at a preset frequency.
A value that is measured by sensors in the inverter or a value that
is calculated from a measured value and a preexisting condition.
Acceleration stop, prevents over current errors during acceleration
by stopping the ramp. The current level is specified by the max.
ramp current (CP.14).
RS232, is the standard serial interface for connection between an
inverter and computer or PLC with a cable length of 45 feet
maximum . RS485, is the standard serial interface for multiple
inverters connected to a computer or PLC . Maximum cable length
is 3000 feet.
The preset analog or digital value with which the frequency inverter
shall operate.
Speed search prevents an over current error when starting the
inverter into a running motor. The motor speed is determined and
the inverter begins to accelerate the motor at this frequency.
The Stall-function protects the inverter against an E.OC error while
running at a constant speed. When exceeding the level adjusted
with CP.15, the output frequency is reduced until the load level
drops below the level in CP.15.
