Brief Description - Siemens SINUMERIK 840D sl Function Manual

Brief Description

2.1 Control/drive system
In order to implement safety–related measures, up until now, external equipment
and devices were used – e.g. contactors, switches, cams and monitoring devices.
If a hazardous situation is detected, these devices generally interrupt the power
circuit thus stopping the motion, see Fig. 2-1.
External safety
systems
External safety
systems
Fig. 2-1 Safety systems: External ––> Integrated
With the integration of safety functions, drive systems and CNC controls perform
safety functions in addition to their functional tasks. Very short response times can
be achieved because of the short data paths from acquisition of the safety–related
information – e.g. speed or position – up to evaluation.
© Siemens AG 2008 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
Drive
control
unit
M
2
CNC
Drive
control unit
Integrated
safety
technology
M
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