Lenze DDS Function library 9300 Servo Manual do Utilizador descarregar pdf (Página 22)

Function block library Lenze9300Servo.lib

Special functions

2.1.2 Supply−failure control (L_MFAIL)

2−12

Lenze9300Servo.lib EN 1.1

Commissioning of the supply−failure control

The commissioning should be carried out with motors without any load.

1. Start the drive with a FALSE−TRUE trasnsition at X5/E5 (when DIGIN_bIn5_b is connected to

bReset_b ).

2. Setting the acceleration time nTi :

– Set speed setpoint to 100%, operate controller with maximum speed.

– Inhibit controller via terminal X5/28 (you can also use any other source for the controller

inhibit, CINH) and measure the deceleration time to standstill.

– Set approx. 1/10 of the deceleration time in nTi .

3. Setting the retrigger time

– For supply−failure detection by detecting the DC−bus voltage level:

In wRetriggerTime set the run−down/deceleration time measured under point 2. .

– For supply−failure detection via an external system (e.g. supply module 934X):

In wRetriggerTime set the time for which the drive continues to be braked in a controlled

way in the event of short−term supply recovery.

4. Switch off the supply voltage (supply or DC−bus).

The oscilloscope should display the following sequence

U G

t 1 t 2

L _ C M P _ b O u t _ b

n D c S e t _ a

Abb. 2−11 Schematic representation with activated supply−failure control (ideal characteristic)

 Switch−off threshold OU

 Switch−on threshold for brake unit

 Threshold

 Threshold LU

n Speed of the drive

t1 Supply−failure

t2 Zero speed reached

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Lenze DDS Function library 9300 Servo Manual do Utilizador Página 22