Siemens SIMATIC S7 F, Manual

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Getting Started
Fail-Safe Systems
2-16
A5E00085588-03
10. Insert the input module SM 326FDI24xDC24V in slot 4 of the ET 200M.
11. Assign symbolic names for all the channels.
12. On the "Inputs" tab of the properties dialog box, select "Enable Diagnostic
Interrupt" and "Safety Mode" with "1oo1 Evaluation".
13. Now insert the output module SM 326F DO10xDC24V/2A.
14. Assign symbolic names for all the channels.
15. On the "Outputs" tab of the properties dialog box, select "Enable Diagnostic
Interrupt" and "Safety Mode in Accordance with SIL2 / AK4". This completes
hardware configuration.
16. Save the current configuration by choosing the Station > Save and Compile
menu command: The system blocks are generated and stored in the program
container.
17. Download the hardware configuration to the CPU of rack 0 (or CPU0 for short).
Note that in SIMATIC Manager all the blocks are stored only in CPU0 (the upper
one of the two).
2.3.3 Fault-Tolerant S7 FH System, Creating a Fail-Safe User Program
Procedure
1. Create the same fail-safe CFC user program as described for the S7 F
Systems.
2. After the charts have been compiled, download them to CPU0.
2.3.4 Starting Up a Fault-Tolerant S7 FH System
Start the programmable controller by first switching the mode selector to RUN-P for
CPU0 and carrying out a warm restart (PLC > Operating Mode). Then switch the
mode selector to RUN-P for CPU1.
CPU0 starts up as the master CPU. CPU1 then starts up and becomes the standby
CPU after it has been linked up and updated.
The first IM 153-2 connected to CPU0 is active: The ACT LED lights up.