
Distributed Use of SIMATIC FS600 Laser
Scanner in Category 3 / SIL 2
Entry ID: 21330889
A&D Safety Integrated Page 6/51 AS-FE-I-010-V20-EN
Copyright © Siemens AG 2007 All rights reserved
21330889_as_fe_i_010_v20_en_lscanner.doc
Distributed use of the laser scanner SIMATIC FS600
In the “PROFIBUS“ variant, the SIMATIC FS600 laser scanner can be
operated as safe bus component together with non-safe standard
components on the same bus (PROFIBUS DP). This is enabled by the
PROFIsafe protocol, an expansion of PROFIBUS DP. For the user this
makes no difference: The SIMATIC FS600 laser scanner is connected to
the PROFIBUS in the same way as other DP slaves.
Communication between F-CPU and laser scanner SIMATIC FS600
The fail-safe S7-CPU (F-CPU) and the SIMATIC FS600 laser scanner
communicate via PROFIBUS.
• The laser scanner SIMATIC FS600 provides the F-CPU with cyclic input
data of 1 byte length.
• The laser scanner SIMATIC FS600 in return expects from the F-CPU
cyclic output data of 1 byte length.
These data can be processed and evaluated in the standard program and
in the safety program of the F-CPU.
The terms “input data” and “output data” refer to the view of the DP master
(F-CPU):
• Input data are read cyclically out of the laser scanner SIMATIC FS600
by the DP master (F-CPU)
• Output data are written cyclically into the laser scanner SIMATIC FS600
by the DP master (F-CPU)
The STEP 7 project (hardware configuration and sample code) delivered
with this safety functional example shows how the cyclic input and output
data are integrated into the application program of the F-CPU.
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