Safety Function
‑81‑
7.3.2 Triggering STO in Local Mode
To correctly use the input signals of the safety module, ensure that the system is
correctly connected. If either the STO1 or STO2 signal is disconnected, the system
enters the safe state.
Table 7–1 STO function list
STO2 Input STO1 Input PWM Status System Status Reset
H H
Normal Normal
‑
H L
Blocked
Error Err47.2,
inconsistent
inputs
Manual reset
L H
Blocked
Error Err47.2,
inconsistent
inputs
Manual reset
L L
Blocked STO enabled
Automatic or
manual reset,
depending on
the value of F9‑
79
Note
● H (1): The corresponding input is connected to the 24 V voltage.
● L (0): The corresponding input is disconnected from the 24 V voltage.
7.3.3 Time Sequence Diagram
Figure 7‑1 Safety function (STO1 trigger changed to OFF)
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