Siemens SINUMERIK 840D sl Function Manual page 112

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Table of Contents

Basics on the Safety Functions Integrated in the System/Drive

5.6 Switching the system on/off

When the system boots, this represents a critical operating state with increased

risk. In this phase, especially when activating drives, it is not permissible that

personnel are close to the hazardous area.

Further, for vertical axes, it is very important to ensure that the drives are in a

state with the pulses cancelled.

A complete forced checking procedure after powering–up (refer to Chapter 5.3,

"Forced checking procedure").

What has to be observed when powering–down?

– The following applies when SE/SN is activated:

The stop position is also cyclically saved.

For this reason, the user should only power–down the control when the

axes/spindles with safety functions have stopped moving.

If the axis is moved with the system powered–down, then the saved stop

position no longer matches the current position. For axes with safety SE and SN

functions, when powering–up, a user agreement is again required after the

position has been checked.

SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition

Sinamics s120