Lenze EVS9332xP Bedienungsanleitung PDF herunterladen (Seite 157)

Function library

Function blocks

3.5.13 Holding brake (BRK)

3−129

EDSVS9332P−EXT DE 2.0

3.5.13.1 Applying the brake

Purpose A HIGH−Signal at the BRK−SET input

activates the function. The BRK−QSP

output is simultaneously set to HIGH.

This signal can be used to decelerate

the drive to zero speed via a

deceleration ramp.

BRK−SET

MCTRL−NSET2

BRK−OUT

BRK−RSP

|BRK−Nx|

C0195

BRK−QSP

Function If the setpoint speed falls below the

value set at the BRK−Nx input, the

BRK−OUT output is set to HIGH. In order

to ensure a fail−safe design this signal

must be inverted at the output (e.g. via

C0118).

3.5.13.2 Opening the brake (release)

Purpose A LOW signal at the BRK−SET input

immediately sets the BRK−CINH output

to LOW. At the same time the

BRK−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 is

elapsed.

BRK−SET

MCTRL−NSET2

BRK−OUT

BRK−RSP

MCTRL−MACT

MACT = C0244

C0196

BRK−M−STORE

BRK−QSP

Function The BRK−OUT output signal is set to

LOW as soon as the torque reaches the

value set under C0244 (holding torque).

When the input is reset, a time element

is triggered. After the time set under

C0196 has elapsed the BRK−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 value higher than the value at BRK−Nx is detected before the brake release time (C0196) has elapsed, the

signals BRK−QSP and BRK−M−STORE are reset immediately. The drive can immediately operate speed or phase−controlled.

If the BRK−QSP output acts on the QSP control word the drive is synchronised to the actual speed and follows its setpoint.

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