Overview Of The Safety Functions Integrated In The Drive - Siemens Sinumerik 840D sl Function Manual

Sinumerik safety integrated

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In order to connect sensors and actuators in a safety--related fashion, their process

signals must be connected--in for further processing.

The two drive CPUs independently execute the safety--related functions. The

CPUs cyclically and mutually compare their safety--related data and results (cross-

wise data comparison). A test can be carried out -- initiated by the CPUs -- to check

the shutdown paths and actuators (forced checking procedure).

When the integrated safety--related functions respond, the drive processors can

act on the connected actuators in a safety--related fashion in--line with the actual

situation. For example, the appropriate stop responses for the drives can be initia-

ted and/or the brakes activated.

Overview of the safety functions integrated in the drive

The safety--related functions are available in all of the operating modes and can

communicate with the process via safety--related input/output signals. They can be

implemented for each individual axis and spindle.

S Safe Torque Off (STO)

The drive pulses are cancelled and therefore the energy feed is safely and elec-

tronically disconnected

S Safe Brake Control (SBC)

The brake is directly controlled at the Motor Module

and monitored

S Safe Stop 1 (SS1)

Braking along the OFF3 ramp, monitoring the stopping time and transition into

SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition

2.3 Safety technology integrated in the drive

through two channels

Brief description

Sinamics s120