Safety Functions Integrated In The Drive; General Information About Sinamics Safety Integrated; Explanations And Terminology - Siemens SINUMERIK 840D sl Function Manual

Safety Functions integrated in the drive

Note
This Chapter describes the safety functions that are integrated in the drive - "Safe Torque Off"
(STO), "Safe Brake Control" (SBC) and "Safe Stop 1" (SS1), which are controlled via the drive
terminals.
Safety functions SH and SBC from the context of the safety-related motion monitoring functions
are described in Chapter "Basics regarding the safety functions integrated in the system/
drive (Page 81)". The "SS1" safety function essentially corresponds there to STOP B. Control
via terminals and from the motion monitoring functions is in parallel and can be used
independently of one another.
5.1

General information about SINAMICS Safety Integrated

5.1.1

Explanations and terminology

Note
The Control Unit is part of the NCU in general.
Two-channel monitoring structure
All the main hardware and software functions for Safety Integrated are implemented in two
independent monitoring channels (e.g. shutdown signal paths, data management, data
comparison).
The two drive monitoring channels are implemented using the following components:
● via the Control Unit
● via the Motor Module/Power Module belonging to a drive
The monitoring functions in each monitoring channel work on the principle that a defined state
must prevail before each action is carried out and a specific acknowledgement must be made
after each action.
If this expected response in a monitoring channel is not fulfilled, the drive coasts to a standstill
(two channel) and an appropriate message is output.
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
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