Siemens MICROMASTER Operating Instructions Manual page 23

5. SYSTEM PARAMETERS
Parameter Function
P011 Frequency setpoint memory
P012 Minimum motor frequency (Hz)
P013 Maximum motor frequency (Hz)
P014 Skip frequency 1 (Hz)
Automatic restart after mains
P015
failure.
Start on the fly
P016
P017 Smoothing type
P018 Automatic restart after fault
P019 Skip frequency bandwidth (Hz)
P020 Flying start ramp time (seconds)
Minimum analogue frequency (Hz) 0 - 400.00
P021
© Siemens plc 1997
Range Description / Notes
[Default]
0 - 1 0 = Disabled
[0]
1 = Enabled after switch-off. i.e. The setpoint alterations made with
the /
has been removed from the inverter.
0 - 400.00 Sets the minimum motor frequency (must be less than the value of
[0.00] P013).
0 - 400.00 Sets the maximum motor frequency.
[50.00]
0 - 400.00 A skip frequency can be set with this parameter to avoid the effects of
[0.00] 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.
0 - 1 Setting this parameter to '1' enables the inverter to restart automatically
[0] 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
0 - 2 Allows the inverter to start onto a spinning motor.
[0]
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).
1 - 2 1 = Continuous smoothing (as defined by P004).
[1]
2 = Discontinuous smoothing. This provides a fast unsmoothed
response to STOP commands and requests to reduce frequency.
Note: P004 must be set to a value > 0.0 for this parameter to have
any effect.
0 - 1 Automatic restart after fault:
[0]
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.
WARNING: While waiting to re-start, the display will flash. This
0 - 10.00 Frequencies set by P014, P027, P028 or P029 that are within +/- the
[2.00] value of P019 are suppressed.
0.50 - 25.0 Used in conjunction with P016 (set longer times if persistent F002 trips
occur).
[5.0]
Frequency corresponding to the lowest analogue input value, i.e.
[0.00] 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).
23
buttons or digital inputs are stored even when power
means that a start is pending and may happen at
any time. Fault codes can be observed in P930.
English
G85139-H1750-U049-B
26/09/97