Annex B : Additional information (informative) ToC Previous Next

B.2 Use cases for Operator Acknowledgment ToC Previous Next

B.2.5 Use case 4: bidirectional comm. and single, two-sided OA ToC Previous Next

readme_files/image040.png Figure 34 – One sided OA on each side is possible

Figure 34 shows a scenario where an operator acknowledgment activated at controller A or controller B suffices for re-establishing the bidirectional connection. Both sides will cease delivering fail-safe values and continue sending process values. This is accomplished by the logic circuits shown in the safety applications.

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