8
Calculating Safety Reaction
T
imes
This section describes how to calculate safety reaction times for Safety Control Units.
8-1 Safety Reaction T
ime ................................................................................... 8 - 2
8-1-1 Calculating the Safety Reaction Time........................................................... 8 - 2
8-1-2 Verifying Safety Reaction Times................................................................... 8 - 4
8-2 Safety Task.................................................................................................... 8 - 5
8-2-1 Safety Task ................................................................................................... 8 - 5
8-2-2 Operation of Safety Task .............................................................................. 8 - 5
8-2-3 Minimum Safety Task Period ........................................................................ 8 - 5
8-2-4 Setting the Safety Task Period...................................................................... 8 - 7
8-3 FSoE Watchdog Timer ................................................................................. 8 - 9
8-3-1 FSoE Watchdog Timers................................................................................ 8 - 9
8-3-2 Checking FSoE Watchdog Timers................................................................ 8 - 9
8-3-3 Settings for FSoE Watchdog Timers........................................................... 8 - 10
8-3-4 Changing FSoE Watchdog Timers.............................................................. 8 - 10
8-4 EPI (Data Packet Interval).......................................................................... 8 - 11
8-4-1 Changing the EPI.........................................................................................8 - 11
8-4-2 EPI Restrictions ...........................................................................................8 - 11
8 - 1
NX-series Safety Control Unit User's Manual (Z930)
8
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