Connecting I/O Via Profisafe; Description Of Functions - Siemens SINUMERIK 840D sl Function Manual

Connecting Sensors/Actuators

7.2 Connecting I/O via PROFIsafe

7.2 Connecting I/O via PROFIsafe
7.2.1

Description of Functions

The fail–safe DP master (F master) integrated in the SINUMERIK 840D sl allows,
in conjunction with fail–safe DP modules (F modules), fail–safe communications
along PROFIBUS DP specified in accordance with the PROFIsafe profile (PROFI-
safe communication).
This means that the safety–related input/output signals of the process (machine)
are coupled to the Safety Integrated function "safe programmable logic" (SPL) in
the same way for both the PLC and NCK–SPL via PROFIBUS–DP .
Interface X126 is used for this purpose.
HMI
Fig. 7-10
PROFIBUS DP
PROFIBUS DP is an international, open fieldbus standard specified in the Euro-
pean fieldbus Standard EN 50170 Part 2. It is optimized for fast data transfer at the
field level (time critical).
In the case of the components that communicate via PROFIBUS DP, a distinction
is made between master and slave components.
1. Master (active bus device)
Components operating on the bus as master determine the data exchange on
the bus and are therefore also designated as active bus devices.
There are two classes of master:
S DP master, Class 1 (DPMC1):
Central master devices that exchange information with the slaves in fixed
message (telegram) cycles.
Examples: S7–300 CPU: CPU 317–2 DP etc.
7-198
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
Ethernet
SINUMERIK 840D sl
SI I/Os using fail–safe modules connected to PROFIBUS–DP
PROFIBUS–DP DP slave ET 200S
Machine control panel
DP slave ET 200S
© Siemens AG 2008 All Rights Reserved
05.08