Delta VFD25AMS23ANSAA

Chapter 17 Safe Torque Off FunctionMS300
776
17-7 Error Code and Troubleshooting Instructions
17-7-1 Error Code Description
Refer to 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 Table 17-4 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: S1 internal circuit detection error
76: STO
77: S2 internal circuit detection error
78: Internal circuit detection error
Error code
Name
Description
72
(STL1)
S1 internal circuit
detection error
S1–DCM internal loop detection error
76
(STo)
Safe Torque Off
Safe Torque Off function active
77
(STL2)
S2 internal circuit
detection error
S2–DCM internal loop detection error
78
(STL3)
Internal circuit
detection error
S1–DCM and S2–DCM internal loop
detection error
Table 17-4: Error code description