Siemens Sinumerik 840D sl Function Manual page 207

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Table of Contents

PROFIsafe communication

The principle of PROFIsafe communications between SINUMERIK 840D and the

F modules is explained in detail below. This is based on the transfer of the SPL

output data $A_OUTSE/$A_OUTSEP to the F--DO modules:

The PROFIsafe layer creates a PROFIsafe telegram (F telegram) in each

PROFIsafe cycle with the ANDed SPL output data as F useful (net) data

and the backup data (CRC and the consecutive number) and transfers it to the

communication layer via the bus interface.

In each communication cycle independent of the PROFIsafe cycle, the PROFIBUS

layer transfers a telegram with a PROFIsafe telegram generated from the F layer

as user data to the slave devices.

It is not guaranteed that simultaneous changes to individual bits in the SPL (NCK

and PLC OUTSE), which are interpreted as a contiguous associated bit pattern,

are transferred together. It is possible that the receiver briefly receives an

inconsistent bit pattern.

Configuring/parameterizing

The configuration and parameterization needed to connect the F modules to the

external NCK/PLC--SPL interfaces entails the following steps:

1. Generating the configuration using SIMATIC STEP7.

2. Performing a standard SINUMERIK 840D sl commissioning (minimum require-

3. Loading the configuration and the PLC basic and user program modules into

the SINUMERIK 840D sl PLC.

4. Parameterizing the PROFIsafe--relevant SINUMERIK 840D sl machine data.

See Chapter7.2.4"Parameterizing the F master (NCK)".

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

F net data = (OUTSEP AND $A_OUTSE)

Connecting Sensors/Actuators

7.2 Connecting I/O via PROFIsafe

Sinamics s120