Starting Against A Closed Brake; Function Diagrams And Parameters - Siemens SINAMICS S120 Function Manual

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Table of Contents

● Direct setpoint specification / MDI for positioning and setting up

● Reference point approach

● Stop responses due to alarms

Jerk limitation is not active when messages are generated with stop responses OFF1/OFF2/

Starting against a closed brake

Function description

Under EPOS, if the drive should start against a closed brake, for example, for a suspended

load, then the enable signal p0899.2 is briefly withdrawn. The drive pulses are canceled and

fault F07490 is output.

To avoid this happening, using p1513 activate a supplementary torque which corresponds to

the brake holding torque. As a result, after releasing the brake, the load cannot sag and the

drive remains in closed-loop control without fault F07490 being output.

Function diagrams (see SINAMICS S120/S150 List Manual)

● 3630 EPOS - Traversing range limits (r0108.4 = 1)

Overview of important parameters (see SINAMICS S120/S150 List Manual)

Software limit switch

● r2683.0...14

● r2684.0...15

Drive functions

Function Manual, 06/2019, 6SL3097-5AB00-0BP2

EPOS maximum speed

EPOS maximum acceleration

EPOS maximum delay

CI: EPOS velocity override

CI: EPOS software limit switch, minus signal source

CI: EPOS software limit switch, plus signal source

CO: EPOS software limit switch, minus

CO: EPOS software limit switch, plus

BI: EPOS software limit switch activation

CO/BO: EPOS status word 1

BI: EPOS STOP cam activation

BI: EPOS STOP cam, minus

BI: EPOS STOP cam, plus

CO/BO: EPOS status word 2

Function modules

9.8 Basic positioner