Table 1 Values used for the calculations of the safety function response time (SFRT )1.
From: Efficient integration of secure and safety critical industrial wireless sensor networks
Variable | Value | Description |
|---|---|---|
OFDT | 6 ms | One fault delay time |
DAT | 6 ms | Device acknowledgment time |
HAT | 6 ms | Host acknowledgment time |
Tcy F_Host | 50 ms | Period time of DCS |
Tcy PNIO | 128 ms | Period time of Profinet IO |
Tcy WH | 3400 ms | Period time of WirelessHART |
WCDT F_Host | 100 ms | Worse case delay time of DCS |
WCDT GW | 50 ms | Worse case delay time of GW |