fail-safe programs

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Implementing S7-PLCSIM with fail-safe programs in SIMATIC PCS 7 V6

How are fail-safe programs supported by S7-PLCSIM and SIMATIC PCS 7 V6?

The installation CD of SIMATIC PCS 7 V6 also includes S7-PLCSIM version V5.2. This version of S7-PLCSIM supports F projects directly. This means that if you have installed S7-PLCSIM V5.2, you no longer have to replace the function blocks of your project with simulation blocks in Simulation mode. In S7-PLCSIM V5.2 the "Simulation" button is no longer displayed in the dialog field "Edit fail-safe program".

There are still certain restrictions for the use of S7-PLCSIM V5.2:

· The communication between CPUs is no longer supported.
· S7-PLCSIM cannot reinitialize the fail-safe program after restart of the "F_SHUTDN" function block. In this case the user has to restart S7-PLCSIM.
· In order to be able to load the fail-safe program in S7-PLCSIM V5.2 the user must first load the hardware and then the fail-safe program.
· S7-PLCSIM uses an unchangeable password for the CPU: plcsim (lowercase letters).

Please also refer to the note in section 5.4.12 "Testing F program with S7-PLCSIM offline" in the manual "S7 F/FH Automation Systems" in Entry ID 2201072.