Operating Instructions

Safe Torque Off Function
Error Code and Troubleshooting Instructions
385 | 443
Figure 17-9
Error Code and Troubleshooting Instructions
Error Code Description
See Pr.06-17–Pr.06-22 for the fault record; the relevant STO error codes are 72/76/77/78.
The definition is described in the table below.
06-17
Fault Record 1
06-18
Fault Record 2
06-19
Fault Record 3
06-20
Fault Record 4
06-21
Fault Record 5
06-22
Fault Record 6
Settings:
72: STO Loss 1 (STL1)
76: STO (STo)
77: STO Loss 2 (STL2)
78: STO Loss 3 (STL3)
Error code
Name
Description
72 (STL1)
STO Loss 1
STO1–SCM1 internal loop detection error
76 (STO)
Safe Torque Off
Safe Torque Off function active
77 (STL2)
STO Loss 2
STO2–SCM2 internal loop detection error
78 (STL3)
STO Loss 3
STO1–SCM1 and STO2–SCM2 internal loop detection error
Table 12: Error Code Description