Technical specifications
A.2 Fail-Safe CPU technical specifications
S7-1200 Functional Safety Manual
Manual, 02/2015, A5E03470344-AA
145
The S7-1200 fail-safe CPUs show you the following information on the "Start Page" of the
web server:
● TIA Portal and STEP 7 Safety versions
● Safety mode enabled/disabled
● Overall signature
● Last fail-safe modification
Note: The time displayed for "Last fail-safe modification" depends on the time being correctly
set in the PLC when you load the program. Note the time is not correct in the PLC if you
remove power from the PLC for an extended time before the program was loaded. The BB
1297 Battery Board allows a longer power down without loss of correct time.
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