2 Engineering
2.10 STO function
DA1 Variable Frequency Drives 11/16 MN04020005Z-EN www.eaton.com 67
2.10.7 Fault messages
The following table lists the error messages relevant to the STO function, as
well as potential causes and fixes.
Table 4: Fault messages
2.10.8 STO function checklist
A drive’s STO function should always be checked before initial
commissioning, after maintenance, and at regular maintenance intervals.
This check should include the following tests:
Display
1)
Fault code
2)
Modbus RTU [hex]
Designation Potential causes and fixes
PS-trP 05 Power section fault • Fault message from the power section’s output.
• Check the connection to the motor (short-circuit, earth
fault).
• Disconnect the cable from terminals U, V, W.
If the fault message cannot be reset, please contact
your nearest Eaton representative.
Sto-F
29 Internal STO circuit fault Please contact your closest Eaton representative.
1) Display = Error code on the 7-digital display assembly or on the optional DX-KEY-LED keypad
2) Modbus RTU [hex] = Hexadecimal fault code via Modbus
No. Occupation Note
1 The STO inputs (control signal terminals 12, 13) are de-
energized. InHibit is displayed when the motor is
stopped and there is a stop command on the DA1
variable frequency drive.
2 The STO inputs (control signal terminals 12, 13) are de-
energized and the DA1 variable frequency drive
receives a start command (depends on the mode
selected in P1-13, Config Select DI).
InHibit is displayed. The motor does not start.
3 The STO inputs (control signal terminals 12, 13) are
powered with 24 VDC and the DA1 variable frequency
drive receives a start command (depends on the mode
selected in P1-13, DI Config Select). The motor starts
normally and is controlled by the DA1 variable
frequency drive.
4 The motor is running while being controlled by the DA1
variable frequency drive and an STO input (control
signal terminal 12 or 13) is de-energized.
InHibit is displayed and the motor coasts,
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