Siemens SIRIUS 3RK3 - Failure and Restoration in the Case of PROFIBUS

Operator control
7.5 Integrating the Modular Safety System 3RK3 in DP master systems
Modular Safety System 3RK3
System Manual, 10/2008, 926 2530-02 DS 02
233
7.5.2.4 Failure and restoration in the case of PROFIBUS
PROFIBUS failure
The DP interface reports a PROFIBUS interruption to the central unit. The central unit then
uses the substitute value "0" for the PROFIBUS logic inputs. Safety mode is not exited. The
bus failure can be diagnosed in MSS ES.
Indication failure PROFIBUS
LED DP-IF Display DP-IF 3RK3 Basic
DEVICE Green BF
DPXXX
Green
BF Red --
SF Off Off
Restoration of PROFIBUS
When the PROFIBUS connection is established again and the self-test is successful, the
central unit continues using the actual values.
Indication of PROFIBUS restoration
LED DP-IF Display DP-IF 3RK3 Basic
DEVICE Green RUN
DPXXX
Green
BF Off --
SF Off Off
XXX stands for the set PROFIBUS address.