11.03 3 Safety-Related Functions
3.12 SI I/Os using fail-safe modules connected to PROFIBUS DP (840D from SW 6.3.30)
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
3-179
3.12 SI I/Os using fail-safe modules connected to
PROFIBUS DP (840D from SW 6.3.30)
3.12.1 Description of functions
From SW 6.3.30 onwards, the SINUMERIK 840D has a fail-safe DP master
(F master). The F master, in conjunction with the fail-safe DP modules
(F modules) permits fail-safe communications on PROFIBUS DP (PROFIsafe
communication) as specified by the PROFIsafe profile.
This means that the safety-relevant input/output signals of the process
(machine) can be coupled to the Safety Integrated function "Safe
programmable logic" (SPL) can be connected in the same way for the PLC and
NCK-SPL via the PROFIBUS DP.
HMI Embedded or
HMI Advanced
Distributed module block
PROFIBUS-DP
MPI-Bus
DP-Slave ET 200S
DP-Slave ET 200S
BEI1_PS.DSF
SINUMERIK 840D
Fig. 3-46 SI I/Os via F modules on PROFIBUS DP
The benefits of this type of connection for safety-relevant I/O signals are:
• Fewer cables are required as a result of the distributed structure
• Unified PLC and NCK-SPL I/Os
• Unified safety-relevant and non-safety-relevant I/Os.
PROFIBUS DP is an international, open field bus Standard specified in the
European field bus 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 node)
Components operating on the bus as master determine the data exchange
on the bus and are therefore also designated active nodes.
General mode of
operation
Benefits
PROFIBUS DP
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