Siemens G85139 Manual De Usuario

5.  SYSTEM PARAMETERS

English

© Siemens plc 1997

G85139-H1750-U049-B

23

26/09/97

Frequency setpoint  memory

0 - 1

[0]

0 = Disabled

1 = Enabled after switch-off. i.e. The setpoint alterations made with

the 

∆

 / 

∇

 buttons or digital inputs are stored even when power

has been removed from the inverter.

•

Minimum motor frequency (Hz)

0 - 400.00

[0.00]

Sets the minimum motor frequency (must be less than the value of
P013).

•

Maximum motor frequency (Hz)

0 - 400.00

[50.00]

Sets the maximum motor frequency.

•

Skip frequency 1 (Hz)

0 - 400.00

[0.00]

A skip frequency can be set with this parameter to avoid the effects of
mechanical resonance. Frequencies within +/-(value of P019) of this
setting are suppressed. Stationary operation is not possible within the
suppressed frequency range - the range is just passed through.

•

Automatic restart after mains
failure.

0 - 1

[0]

Setting this parameter to ‘1’ enables the inverter to restart automatically
after a mains break or ‘brownout’, provided the run/stop switch is still
closed, P007 = 0 and P910 = 0, 2 or 4.

0 = Disabled
1 = Automatic restart

•

Start on the fly

0 - 2

[0]

Allows the inverter to start onto a spinning motor.

Under normal circumstances the inverter runs the motor up from 0 Hz.
However, if the motor is still spinning or is being driven by the load, it will
undergo braking before running back up to the setpoint - this can cause an
overcurrent trip. By using a flying restart, the inverter ‘homes in’ on the
motor's speed and runs it up from that speed to the setpoint. Note: If the
motor has stopped or is rotating slowly, some ‘rocking’ may occur as the
inverter senses the direction of rotation prior to restarting. (See also P020)

0 = Normal restart

1 = Flying restart after power up, fault or OFF2 ( if P018 = 1).

2 = Flying restart every time (useful in circumstances where the

motor can be driven by the load).

•

Smoothing type

1 - 2

[1]

1 = Continuous smoothing (as defined by P004).
2 = Discontinuous smoothing. This provides a fast unsmoothed

response to STOP commands and requests to reduce frequency.

P004 must be set to a value > 0.0 for this parameter to have
any effect.

•

Automatic restart after fault

0 - 1

[0]

Automatic restart after fault:

0 = Disabled
1 = The inverter will attempt to restart up to 5 times after a fault. If

the fault is not cleared after the 5th attempt, the inverter will
remain in the fault state until reset.

•

Skip frequency bandwidth (Hz)

0 - 10.00

 [2.00]

Frequencies set by P014, P027, P028 or P029 that are within +/- the
value of P019 are suppressed.

Flying start ramp time (seconds)

0.50 - 25.0

[5.0]

Used in conjunction with P016 (set longer times if persistent F002 trips
occur).

•

Minimum analogue frequency (Hz)

0 - 400.00

[0.00]

Frequency corresponding to the lowest analogue input value, i.e.
0 V or 2 V. This can be set to a higher value than P022 to give an
inverse relationship between analogue input and frequency output (see
diagram in P022).