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STO - Safe led blink slowly g120C

1/23/2024 6:15 PM	Rate (0)
@AutoGen_1013003 Posts: 3 Rating: (0)	Hi, Recently, I bought a used VFD G120C, I was unable to recover the password for the safety functions (0/0000/1/12345 doesn't work). I did a factory reset for the parameters. I did the configuration on TIA portal software. all is good, no fault, 1 alarm (ID motor waiting) but impossible to ID motor (start up) because the safe led is flashing slowly (STO). Configuration 13 DI0- On/Off DI1 - Setpoint inversion DI2 - Acknowledge fault Selection of the safety Integrated Function -Basic functions Control type / safety Integrated Function - Via terminals / STO pin 16/17 (FI-D) are supplied with 24 DC. they are supplied at the same time. attached are the safety parameters that I cannot modify. I'm missing something, but I don't know what it is. Attachment STO wiring.png (357 Downloads)
@AutoGen_1013003 Posts: 3 Rating: (0)
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1/23/2024 7:38 PM	Rate (0)
Hati Platinum Member Joined: 9/21/2012 Last visit: 1/14/2026 Posts: 4848 Rating: (512)	Did you switch off 24v and 400v from the VFD after you made changes to the safety? After safety changes, or initial parameter download, you always need to power cycle the drive, for the parameter changes to take affect.

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1/23/2024 8:44 PM	Rate (0)
@AutoGen_1013003 Posts: 3 Rating: (0)	yes, still the same, the safe led blinking slowly
@AutoGen_1013003 Posts: 3 Rating: (0)
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1/24/2024 5:31 AM	Rate (0)
Hati Platinum Member Joined: 9/21/2012 Last visit: 1/14/2026 Posts: 4848 Rating: (512)	@AutoGen_1013003 yes, still the same, the safe led blinking slowly Then it's missing STO signals.

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1/28/2024 3:01 PM	Rate (0)
@AutoGen_1013003 Posts: 3 Rating: (0)	I'm in test mode, the drive is not connected to the motor, is only power on. Despite the simplistic wiring, the LED continues to flash.(see photo attached) Attachment STO wiring.jpg (360 Downloads)
@AutoGen_1013003 Posts: 3 Rating: (0)
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1/28/2024 4:43 PM	Rate (0)
Hati Platinum Member Joined: 9/21/2012 Last visit: 1/14/2026 Posts: 4848 Rating: (512)	@AutoGen_1013003 I'm in test mode, the drive is not connected to the motor, is only power on. Despite the simplistic wiring, the LED continues to flash.(see photo attached) Did you measure the drives internal power supply, that it's supplying correct voltage?

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