Siemens G85139 P011, P012 ∙ P013 ∙ P014 ∙ P015 ∙, P016 ∙, P017 ∙ P018 ∙, P019 ∙ P020 P021 ∙

5. SYSTEM PARAMETERS English

Parameter

P011

Function		Range
		[Default]
Frequency setpoint memory	0 - 1
	[0]

Description / Notes

0 = Disabled

1 = Enabled after switch-off. i.e. The setpoint alterations made with the Δ / ∇ buttons or digital inputs are stored even when power has been removed from the inverter.

P012 ∙

P013 ∙

P014 ∙

P015 ∙

Minimum motor frequency (Hz)	0 - 400.00		Sets the minimum motor frequency (must be less than the value of
	[0.00]		P013).
Maximum motor frequency (Hz)	0 - 400.00		Sets the maximum motor frequency.
	[50.00]
Skip frequency 1 (Hz)	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.
Automatic restart after mains	0 - 1		Setting this parameter to ‘1’ enables the inverter to restart automatically
failure.	[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

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 ∙

P018 ∙

Smoothing type	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.

Automatic restart after fault	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 means that a start is pending and may happen at any time. Fault codes can be observed in P930.

P019 ∙

P020

P021 ∙

Skip frequency bandwidth (Hz)	0 - 10.00		Frequencies set by P014, P027, P028 or P029 that are within +/- the
	[2.00]		value of P019 are suppressed.
Flying start ramp time (seconds)	0.50 - 25.0		Used in conjunction with P016 (set longer times if persistent F002 trips
		[5.0]	occur).
Minimum analogue frequency (Hz)	0 - 400.00		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).

© Siemens plc 1997G85139-H1750-U049-B

23 26/09/97