Siemens SINUMERIK 840D sl Function Manual page 185

Safety integrated

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PROFIsafe is a communication profile for failsafe data transfer between failsafe components

based on the field buses PROFIBUS and PROFINET. This represents an extension to the

standard communication. This allows both standard components and failsafe components to

be simultaneously operated on a PROFIBUS/PROFINET system.

The PROFIsafe profile is characterized by the fact that communication between the safe

terminal nodes, i.e. the F-CPUs, the distributed slaves and the actuators/sensors/field devices,

uses standard PROFIBUS functions.

The useful (net) data of the safety function plus the safety measures are sent in a standard

data telegram. This does not require any additional hardware components, since the protocol

chips, drivers, repeaters, cables can still be used as they are.

SINUMERIK Safety Integrated supports PROFIsafe V1 and PROFIsafe V2.

Communication profiles in accordance with IEC 61784

CP 3/1: PROFIBUS

CP 3/4: PROFINET CLASS A

CP 3/5: PROFINET CLASS B

CP 3/6: PROFINET CLASS C (IRT)

This mode is designed for pure CP 3/1 networks (PROFIBUS DP).

This mode has been designed for pure CP 3/4 - CP 3/6 networks (Ethernet, PROFINET),

but can also be used for CP 3/1 networks (PROFIBUS DP).

The designations F-master and F-slave for PROFIBUS DP are in this documentation – also

for the designations F-host and the F-device for PROFINET.

Safety Integrated

Function Manual, 12/2017, 6FC5397-4BP40-6BA1

SI I/O using failsafe modules connected to PROFIBUS DP

Connecting sensors and actuators

8.2 Connecting I/O via PROFIsafe