Functions
8.18 Fail-safe functions
Control Units CU240S
8-108 Operating Instructions, 11/2006, A5E00766042B AA
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Figure 8-70 Safe Torque Off function
The STO function has the highest priority and cannot be intercepted by any other function.
Note
The state of the fail-safe functions is announced by r9772.
Caution
Reaction time
The reaction time for a STO is 20 ms.
Fault reaction time
An internal failure during a STO will be detected within 20 ms and leads immediately to a
LSTO.
The overall reaction time is the sum of reaction time and fault reaction time.
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