Lenze EVS9332xS Manual de usuario descargar pdf (Pagina 89)

Function library

Function blocks

3.2.13 Holding brake (BRK)

3−37

EDSVS9332S−EXT EN 2.0

3.2.13.1 Engaging the brake

Purpose A HIGH signal at the BRK1−SET input

activates the function. The output

BRK1−QSP is simultaneously switched

to HIGH. This signal can be used to

decelerate the drive to zero speed via a

deceleration ramp.

BRK1−SET

MCTRL−NSET2

BRK1−OUT

BRK1−CINH

|BRK1−Nx

C0195

BRK1−QSP

Function If the setpoint speed falls below the

value set at the BRK1−Nx input, the

output BRK1−OUT is set to HIGH. In

order to ensure a fail−safe design this

signal must be inverted at the output

(e.g. via C0118).

3.2.13.2 Disengaging (releasing) the brake

Purpose A LOW signal at the BRK−SET input

immediately sets the BRK−CINH output

to LOW. At the same time the

BRK1−M−STORE output is set to HIGH.

This signal can be used to generate a

defined torque against the brake. The

drive thus takes over the torque while

the brake is released. The signal is only

reset after the time set under C0196

has elapsed.

BRK1−SET

MCTRL−NSET2

BRK1−OUT

BRK1−CINH

MCTRL−MACT

MACT = C0244

C0196

BRK1−M−STORE

BRK1−QSP

Function As soon as the torque reaches the

value set under C0244 (holding torque),

the output BRK1−OUT is set to LOW.

When the input is reset, a timing

element is triggered. After the time set

under C0196 has elapsed the

BRK1−QSP output is reset. This signal

serves to e.g. release the setpoint

integrator after the brake release time

has elapsed.

Note If an actual speed higher than the value at BRK1−Nx is detected before the brake release time (C0196) has elapsed, the

signals BRK1−QSP and BRK1−M−STORE are reset immediately. The drive can operate in a speed or angle−controlled

manner immediately. If the BRK1−QSP output acts on the QSP control word, then the drive is synchronised to the actual

speed and follows its setpoint.

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Lenze EVS9332xS Manual de usuario Pagina 89

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