Fault reaction and diagnostics
6.1 Fault reactions of the F-SMs
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
53
Reaction of the SM 326; F-DO 10 x DC 24V/2A PP to CPU Stop
Depending on the parameter "Reaction to CPU Stop", the SM 326; F-
DO 10 x DC 24V/2A PP will behave according to the following standards:
Parameter setting "Reaction to CPU Stop"
Switch to fail-safe value "0" Keep last valid value
Compliance with all standards listed in the
certificates.
The certificates are available in the Internet at:
Certificate for S7 Distributed Safety
(http://support.automation.siemens.com/WW/
view/en/11669702/134200)
Certificate for S7 F/FH systems
(http://support.automation.siemens.com/WW/
view/en/13711209/134200)
Only compliant with:
NFPA72
EN54-2 /-4
Reintegration of fail-safe signal modules
The changeover from fail-safe values to process values (reintegration of an F-SM) is
executed either automatically or in the safety program after user acknowledgment. After a
reintegration:
● For a fail-safe input module, the process values pending at the fail-safe inputs are made
available to the safety program again
● For a fail-safe output module, the output values made available in the safety program are
again transferred to the fail-safe outputs
Additional information on passivation and reintegration
For additional information on passivation and reintegration of F-I/O, refer to the
S7 Distributed Safety Configuring and Programming
(http://support.automation.siemens.
com/WW/view/en/22099875
) or S7 F/FH Configuring and
Programming (http://support.automation.siemens.com/WW/view/en/16537972
) manual.
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