Siemens SIMATIC PCS 7 Operating Manual page 142

Configuring the safety program
7.11 Monitoring times and system response times
When Profinet IO is used, the following PROFINET network parameters are required
T
WD
T
PN_FD
T
PN_SO
T parameter
DP_DLY
You can find the T
properties in HW Config.
142
Watchdog time of PROFINET IO devices.
This can be found in the "IO cycle" tab in the properties of the PROFINET IO device. If
no watchdog time is specified for the IO device, use three times the update time from
the properties of the PROFINET IO system.
Max. PROFINET IO error detection time from the H-parameters tab of the properties of
the bus system
Max. PROFINET IO switchover time from the H-parameters tab of the properties of the
bus system
parameter on the "Operating Mode" tab of the CP 443-5 ext
DP_DLY
Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB