Help with SAFF on ATV320

[fritz_kaker]

Customer has an Altivar320 drive that randomly gives SAFF error.

power cycling will sometimes clear the fault, only to have it come back immediately, or randomly in a few minutes or a few hours.

The customer will only let their engineers connect a laptop to their equipment, so I am unable to use SOmove to look at the registers, and their engineer is in another state.

The graphic display terminal is not available either, so all I have is the hmi.

the factory jumper is connected from P24 to STO, and 24v is present there.

In an attempt to eliminate the motor as a cause, removed the motor wires from the drive, and I still get SAFF on power up.

Any tips to resolve this before replacing the drive?

[BJacqz]

I am not specialist on this topic but may be this document can help you on this matter. I advise then to contact your local Schneider representative.

ATV32 How to Diagnose a SAFF fault.pdf

[Ahmed_Alzafer · Accepted solution]

Hello 

 SAFF status on the drive means after the drive was powered up in RDY  or is running, and someone opened one of the safety STO, SLS, SS1 safety inputs.

To clear the SAFF, power down the drive and make sure any assigned safety inputs are turned on or jumper to +24vdc before you power the drive back up. (For Testing purpose only).

Other things to check that can trigger a SAFF

Make sure Debounce time and response time are set to 0 for both to deactivate this function. Again, if the values are out of range, it can trigger a SAFF status.

unfortunately, Safety programming can only be done using SoMove programming software.