Service and maintenance
4.5 Fail -Safe Function Status LEDs
Control Units CU240S
Operating Instructions (Compact), 04/2006, A5E00766042B AA
4-7
4.5 Fail-Safe Function Status LEDs
STO Fail-safe function states via LED
LED
SF RDY BF ES STO SS1 SLS
red green red yellow
Description
not relevant not relevant not relevant
not relevant not relevant
STO parameterized
not relevant not relevant not relevant
not relevant not relevant
STO triggered
not relevant not relevant not relevant
not relevant not relevant
STO reached
not relevant not relevant not relevant
LSTO triggered
SS1 Fail-safe function states via LED
LED
SF RDY BF ES STO SS1 SLS
red green red yellow
Description
not relevant not relevant not relevant
SS1 parameterized
not relevant not relevant not relevant
not relevant
not relevant
SS1 triggered
not relevant not relevant not relevant
not relevant
not relevant
SS1 reached
not relevant not relevant not relevant
not relevant STO reached,
end state for SS1
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