Siemens SIMATIC PCS 7 Operating Manual page 138

Configuring the safety program
7.11 Monitoring times and system response times
Parameter T
from the H parameters of the CPU.
If the cyclic interrupt OB in which the F_CYC_CO block is called has been entered as a
"cyclic interrupt OB with special handling", set "Yes" for special handling in the Excel table.
You only have to enter parameters T
have activated the CiR function. If you are not using CiR, enter 0 for both values.
T
CiRmax
138
is the same as the "Max. disabling time for priority classes > 15" parameter
P15
is set to 1 s in the system, but can be changed by calling SFC 104.
and T if you are not using an H system and
CiR CiRmax
Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB