HEIDENHAIN TNC 620, User Manual

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Setup | Integrated functional safety (FS)
Safety functions
To ensure that the requirements for operator protection are met,
integrated functional safety (FS) provides standardized safety
functions. The machine manufacturer uses the standardized safety
functions for implementing functional safety (FS) for the machine in
question.
You can track the active safety functions in the axle status of
functional safety (FS).
Description Meaning Short description
SS0, SS1,
SS1D, SS1F,
SS2
Safe Stop Safe stopping of drives using different methods
STO
Safe Torque Off The power supply to the motor is interrupted. Provides
protection against unexpected start of the drives
SOS
Safe Operating Stop Safe operating stop. Provides protection against
unexpected start of the drives
SLS
Safely Limited Speed Safely limited speed. Prevents the drives from exceed-
ing the specified speed limits when the protective door
is opened
SLP
Safely Limited Position Safely limited position. Monitors safe axes to keep
them within the limit values of a defined area
SBC
Safe Brake Control Dual-channel control of the motor holding brakes
Functional safety (FS) status displays
The control indicates the active safety-related operating mode by an
icon in the vertical soft-key row:
Icon Safety-related operating mode Short description
SOM_1
operating mode active Safe operating mode 1:
Automatic mode, production mode
SOM_2
operating mode active Safe operating mode 2:
Set-up mode
SOM_3
operating mode active Safe operating mode 3:
Manual intervention; only for qualified opera-
tors
SOM_4
operating mode active
This function must be enabled and
adapted by the machine manufacturer.
Safe operating mode 4:
Advanced manual intervention, process
monitoring, only for qualified users
5
HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
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