Siemens SIMATIC PCS 7 Operating Manual page 164

Configuration with Safety Matrix
8.3 Organizing matrices into different shutdown groups
Inserting a new matrix in a new shutdown group.
To insert a new matrix and assign it to a new shutdown group, proceed as outlined below.
1. Create a new matrix and, in the Safety Matrix engineering tool, for the matrix cycle time
select a cyclic interrupt OB that is not in use and into which no matrices have yet been
inserted.
2. Create your safety function and transfer the matrix. In the cyclic interrupt OB, three
runtime groups will be created for this matrix.
3. Move all three runtime groups to the destination cyclic interrupt OB (in this case, cyclic
interrupt OB 37) and placing them before the first runtime group of the safety program.
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Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB