YASKAWA VS MINI J7 Manuel d'utilisateur télécharger pdf (Page 70)

• Stall prevention (current limit) level during running (n57)

Sets the stall prevention (current limit) level during running in units of 1%

(Inverter rated current = 100%).

* Factory setting: 160%

A setting of 200% disables the stall prevention (current limit) during

running.

If stall prevention action current at agreed speed exceeds the value set for

n57 for longer than 100msec, deceleration starts.

When the output current exceeds the value set for n57, deceleration

continues. When the output current goes down to the value set for n57,

acceleration starts, up to the set frequency.

Stall prevention accel/decel settings during operation are: currently selected

acceleration time 1 (n16), deceleration time 1 (n17) and acceleration time 2

(n18) and deceleration time 2 (n19).

* reduces frequency prevent speed loss

† at acceleration start, output current hysterisis

is approx., 5% of inverter rated current.

• Stall prevention (current limit) function during deceleration (n55)

To prevent overvoltage during deceleration, the inverter automatically

lengthen the deceleration time according to the value of main circuit DC

voltage.

Setting

Provided

Not Provided

Stall prevention (current limit)

during deceleration

MOTOR CURRENT

n57

OUTPUT

FREQUENCY

TIME

†

100msec

SET

DECEL

TIME

Controls the deceleration

time to prevent overvoltage

fault.

FREQUENCY

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YASKAWA VS MINI J7 Manuel d'utilisateur Page 70