Troubleshooting Instructions - Delta MS300 Series User Manual

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Chapter 17 Safe Torque Off FunctionMS300

17-7-2 Troubleshooting Instructions

Refer to the following instructions for troubleshooting when STO / STL1 / STL2 / STL3 shows on keypad.
(Refer to Chapter 14 Error Codes)
KPMS-LE01
ID No.
Keypad displays
72
76
77
78
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S1~DCM internal loop detected error
Corrective Actions
 Check wiring of S1 terminal.
 Reset emergency switch (ON: activated) and re-power
 Check the input voltage to maintain at least 11V.
 Check the wiring of S1 and +24V terminal.
 After make sure all the wiring is correct, if STL1 fault still exists after
re-power, please contact Delta.
Safe torque off function active
Corrective Actions
 Check wiring of S1 and S2 terminal.
 Reset emergency switch (ON: activated) and re-power.
 Check the input voltage to maintain at least 11V.
 Check the wiring of S1/S2 and +24V terminal.
 After make sure all the wiring is correct, if STO fault still exists after
re-power, please contact Delta.
S2~DCM internal loop detected error.
Corrective Actions
Check wiring of S2 terminal.

 Reset emergency switch (ON: activated) and re-power.
 Check the input voltage to maintain at least 11V.
 Check the wiring of S2 and +24V terminal.
 After make sure all the wiring is correct, if STL2 fault still exists after
re-power, please contact Delta.
Internal loop detected error.
Corrective Actions
 After make sure the wiring is correct, if STL3 fault still exists after
re-power, please contact Delta.
17-10
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Descriptions
Email: info@deltaacdrives.com
Email: info@deltaacdrives.com