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ANTRIEBSTECHNIK

KEB COMBIVERT F4-C

Name: Basis

25.03.98

AnnexSearch and Find

Section PageDate

Chapter

13.1.2 Term Definition

Analog/Digital Earth The COMBIVERT F4 has isolated digital inputs, i.e. the inputs are galvanically

separated from the internal potential. Thus equalizing currents between the components

are avoided. The digital earth is the reference point of this separated control circuit. The

analog earth is directly connected with the inverter ground, it serves as potential for the

analog setpoint setting.

EMC Electromagnetic compatibility; the guidelines for the reduction of interferences emitted

by units as well as the safety of operation of troubled units.

Energy-saving Function When motors run at no-load the voltage can be lowered once this state is reached

thereby saving energy.

Frequency-dependent Switch Relay or transistor output which switches dependent of a preadjusted frequency.

Actual value At a closed-loop controlled system it is the feedback value supplied by the external

detection. At controlled systems it is the value calculated on the basis of the adjusted

conditions.

LA-Stop Acceleration stop prevents overcurrent errors during acceleration by stopping the ramp.

The current level is determined through the max. ramp current (CP.14).

RS232/485 RS232, standardized serial interface for max. 1 end unit at a max. line length of 15 m.

RS485, standardized serial interface for max. 240 end units and 1000 m line lengths.

Setpoint Value The analog and digital preset values with which the frequency inverter shall operate.

Speed Search Speed Search prevents overcurrent errors at the connection to rotating motors. The

motor speed is indirectly determined , the inverter accelerates only after it has adapted

its rotary speed.

Stall The Stall function protects the inverter from switch off due to overcurrent at constant

output frequency. On exceeding the level adjusted with CP.15 the output frequency is

reduced until the value is again below the adjusted value.

KEB COMBIVERT F4-C Applications Manual

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