Siemens G85139 - Manual (Page 23)

5. SYSTEM PARAMETERS English
Parameter Function Range
[Default]
Description / Notes
© Siemens plc 1997 G85139-H1750-U049-B
23 26/09/97
P011 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.
P012
•
Minimum motor frequency (Hz) 0 - 400.00
[0.00]
Sets the minimum motor frequency (must be less than the value of
P013).
P013
•
Maximum motor frequency (Hz) 0 - 400.00
[50.00]
Sets the maximum motor frequency.
P014
•
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.
P015
•
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
P016
•
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).
P017
•
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.
Note: P004 must be set to a value > 0.0 for this parameter to have
any effect.
P018
•
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.
WARNING: While waiting to re-start, the display will flash. This
means that a start is pending and may happen at
any time. Fault codes can be observed in P930.
P019
•
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.
P020 Flying start ramp time (seconds) 0.50 - 25.0
[5.0]
Used in conjunction with P016 (set longer times if persistent F002 trips
occur).
P021
•
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).