Slip Compensation - Instantaneous Overload Signalling - Prevention Of Short Mains Blackout - Pickup Of Motor In Free Rotation (Flying Restart) - Automatic Boost - Siei QUIXDrive F Manuel D'instruction

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INVERTER PARAMETERS

Slip compensation - Instantaneous overload signalling - Prevention of short mains blackout -

Pickup of motor in free rotation (flying restart) - Automatic boost

ARA

UNCTION

METER

Defines value of the

P - 3 2

motor rated slip (% )

s=(n

-n

)*100/n

nom

Compensation time

P - 3 3

constant

Enable the overload

b - 1 7

detection function

Select when the detec-

b - 1 8

tion function is active

Set the overload locked

b - 1 9

state

Set the tripping level of

P - 5 5

the protection

Set the delay before

P - 5 6

the protection trip

Enables the prevention

b - 2 8

of short mains blackout

Determines the under-

voltage protection trip-

P - 7 5

ping threshold

Set the max. duration of

the

short

mains

P - 7 6

blackout before the

alarm is enabled

Enables the tripping of

b - 2 9

the motor pickup

Selects the initial

b - 3 0

scanning frequency

Enables the function

b - 3 1

with the first run control

after startup

Sets the max. current

P - 8 0

threshold

during the

motor pickup phase

Delay to activate the

P - 8 1

motor pickup function

Sets the rate of change

P - 8 3

of the frequency during

the lock search

Set the max. rate of

P - 8 4

change of the voltage

Enables the automa-

b - 3 4

tic boost.

26-GB

ANGE

[ D

]

EFAULT

The parameters compensate for the motor speed reduction when increasing the

0.0 - 25.0

applied load (slip), changing the inverter output frequency proportionally to the

applied load. Note: a too quick response (P-33 too short) can cause fluctuations

[ 0.0 ]

in the output frequency. To obtain a good compensation properly set P-09, P-11,

0.0 - 10.0

P-12 and if the reference frequency is close to the maximum frequency, it is

advisable to set on P-37 a value beyond 100%

[ 0.1 ]

( s )

The aim of the function which detects the overload is to signal or avoid exces-

0 = off - 1 = on

sive efforts on the load, causing the istantaneous locking of the inverter and

[ 0 ]

the allarm signalling.

0=always - 1= con.

The threshold defined by P-55 is in % of the motor rated load as obtained

speed [ 0 ]

through parameters P-09, P-11.

0 = off - 1 = on

The threshold exceeding can be signalled through terminal board by configu-

[ 0 ]

ring the Ox-GTT output.

20 - 200

The parameter P-12 must be accurately set too.

[ 110 ]

( % )

P-56 Set how long the overload can exceed the tripping threshold before the

0.1 - 25.0

signalling and the inverter lock functions are enabled

[ 0.1 ]

( s )

0 = off - 1 = on

The parameters avoid locking the inverter when a short mains blackout

[ 0 ]

happens.The mains cut off is stated on the display and on the terminal board by

configuring one of digital outputs OUT1.

Note:on single phase inverter it is advisable to reduce the P-75 value to the

minimum to prevent excessive start-up currents. Otherwise it is possible that

40 - 80

the inverter locks by undervoltage.

[ 70 ] (% di P-02)

The alarm is always enabled if the voltage falls under a given value that depends

on the inverter size; the tripping of the prevention function sets the output voltage

to zero, (coast-to-stop). In this way, the filter capacitors are not completely

discharged thus keeping the control logic active. As soon as the voltage exceeds

0.1 - 25.0

the threshold (hysteresis of 6%), a pickup phase of motor in free rotation is

[ 1 ]

( s )

performed, thus resetting the speed in force before the tripping.

0 = off - 1 = on

The aim of the pickup function of motor in free rotation is to avoid too high start-

[ 0 ]

up currents generated when, for some causes the inverter cuts the voltage to the

0=ref. freq.

motor, then a subsequent run command makes a start from zero Hz with the

1=max. freq.

motor still rotating.

[ 0 ]

This function generates an initial frequency, b-30, equal to or higher than the

0 = off - 1 = on

motor one, by gradually increasing, P-84, the output voltage to 100 % and

[ 0 ]

controlling that the current does not exceed a preset threshold set by P-80, (it is

advisable that this value should be slightly higher than the current absorbed by

20 - 200

the motor ) otherwise the output frequency would be reduced and the voltage

[ 120 ] (% di Inom)

would be limited.

The delay between the cut off of the motor voltage and when the motor pickup

0.01 - 10.00

phase start can be controlled by P-81 (demagnetization time).

( s )

The motor is considered frequency-locked when a given frequency is reached so

0.1 - 25.0

that, at full voltage, the current is under the threshold.The motor can then be

[ 1 ]

( s )

accelerated or decelerated until the reference is reached.

b-23 enables the use of a frequency obtained from an encoder as initial fre-

0.1 - 25.0

quency for motor pickup.

[ 0.2 ]

( s )

The motor pickup function can be enabled through terminal board by configuring

one of the inputs as Ix-FLY input. If the Ix-FLY input is active, every time the run

control is pressed the motor pickup is performed.

This function is an alternative to the voltage (and torque) boost obtained through

0 = off - 1 = on

parameter P-04 (pag. 23).The output voltage is automatically increased as

[ 0 ]

regards the motor and the connected load characteristics. The efficiency of the

action depends on the accuracy applied when setting the parameters P-09, P-

11, P-12.

If the programming phase is not performed in the right way, some oscilla-

tions may occur.

—————— SIEI ——————

ESCRIPTION

Table des Matières

Ce manuel est également adapté pour:

Quixdrive v