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Control Modes (p1300); Faults And Warnings - Siemens Micromaster 420 Operating Instruction

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International English
4.3.5
Compound Braking
Compound Braking is possible with both OFF1 and OFF3. For Compound Braking a DC
component is added to the AC current.
set the braking current:
4.4

Control Modes (P1300)

The various modes of operation of the MICROMASTER 420 control the relationship
between the speed of the motor and the voltage supplied by the inverter. There are four
modes of operation:
Linear V/f control
Can be used for variable and constant torque applications, such as conveyors and
positive displacement pumps.
Flux Current Control (FCC)
This control mode can be used to improve the efficiency and dynamic response of the
motor.
Quadratic V/f control
This mode can be used for variable torque loads, such as fans and pumps.
Multi-point V/f control
For information regarding this mode of operation, please consult the MM420
Reference Manual.
4.5

Faults and warnings

SDP fitted
If an SDP is fitted, the fault states and warnings are indicated by the two LEDs on the
panel, see section 6.1 for further information.
BOP fitted
If a BOP is fitted, the fault states and warnings listed in Section 6.3 for further information.
40
4. USING THE MICROMASTER 420
see P1236
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0

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