HEIDENHAIN TNC 620, User Manual

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Setup | Integrated functional safety (FS)
5
5.4 Integrated functional safety (FS)
Miscellaneous
Machine tools with HEIDENHAIN controls may be equipped with
integrated functional safety (FS) or with external safety. This chapter
refers exclusively to machines with integrated functional safety (FS).
Refer to your machine manual.
Your machine tool builder adapts the HEIDENHAIN safety
system to your machine.
Every machine tool user is exposed to certain risks. While protective
devices can prevent access to dangerous locations, the user
must also be able to work on the machine without this protection
(e.g. guard door opened).
The HEIDENHAIN safety concepts enables the setup of a system
that fulfills the requirements of Performance Level d, Category 3
in accordance with DIN EN ISO 13849-1 and
SIL 2 in accordance with IEC 61508 (DIN EN 61508-1) .
It provides safety-related operating modes, as per
DIN EN ISO 16090-1 (previously DIN EN 12417). Comprehensive
operator protection can thus be implemented.
The basis of the HEIDENHAIN safety concept is the dual-channel
processor structure, which consists of the main computer (MC) and
one or more drive controller modules (CC).
Safety-relevant faults always lead to
safe stopping of all motors
through defined stop reactions .
Defined safety functions are triggered and safe operating statuses
are achieved via dual-channel safety-relevant inputs and outputs,
which have an influence on the process in all operating modes.
In this chapter you will find explanations of the functions that are
additionally available on a control with functional safety (FS).
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HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022