S7-1500F profinet FDBACK safety function

Is it possible to use the feed back safety function with a drive over profi-safe and if so, what do I use for the input QBAD_FIO?

If I was doing this with a hard wired safety circuit I would have the STO output from the drive as a feedback signal into the safety relay.

When using a contactor on a failsafe output card, the FEEDBACK input would come from contactor and the QBAD_FIO signal would come from the process input word of the output card.

I have the STO status of the drive in profisafe to use as feedback but I can't figure out how to control the QBAD_FIO input.

Would an option be to use the ESTOP function and put the STO in series with the ACK signal?

Can you explain a bit more of what you want to accomplish? And which model drive is involved? Do you want the STO feedback to safely turn off another safety output? Which category of safety do you need (0-4)?

Its n S120 drive and I'm using the Seimens LDrvSafe Library functions.
The STO is working fine, when I operate an estop or light guard I can see the STO is active.
When I restart I want to check STO is active as I would if I was using a hardwired safety relay
PLd

Would an option be to use the ESTOP function and put the STO in series with the ACK signal?

Click to expand...

This was my original thought. Of course this is possible... Siemens even showed they use a bit from an HMI button to ACK, so I don't see a reason not to use STO status.