Step 10: Programming The User Acknowledgment For Reintegration Of The Fail-Safe Sm - Siemens SIMATIC S7 Functional Safety Manual

Getting started
2.3 Programming
2.3.7 Step 10: Programming the user acknowledgment for reintegration of the fail-
safe SM
In this step, you program the user acknowledgement for reintegration of the fail-safe signal
module I/O for this example.
The user must acknowledge that conditions have returned to a safe state before production
operations can be restarted.
Click the "Play" button to start the animation file. Click the other control elements to rewind,
pause, go back, or go forward.
Procedure
In your safety program, you must provide a user acknowledgment for the reintegration of the
fail-safe signal module I/O. In order to acknowledge in the event of passivated F-I/O, the
acknowledgement pushbutton is evaluated using a standard input. In this example, this is the
"Acknowledge" input.
You can use the ACK_GL instruction to reintegrate all F-I/O of an F-runtime group.
1. Insert a new network.
2. Insert the "ACK_GL" instruction from the "Safety functions" subfolder of the "Instructions"
task card.
3. Click "OK" to confirm the "Call options" dialog.
4. Initialize the input with parameters as described in the table below.
Result
The programming of the user acknowledgment is now complete.
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S7-1200 Functional Safety Manual
Manual, 02/2015, A5E03470344-AA