Siemens SIMATIC PCS 7 Operating Manual page 154

Configuring the safety program
7.11 Monitoring times and system response times
T parameter
DIS
You set the discrepancy time when 1oo2 (2v2) has been selected in the hardware
configuration of the F-signal module.
Enter 0 if:
● No 1oo2 (2v2) evaluation is performed on the module.
● The value 0 is immediately output in the event of a discrepancy.
154
Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB