text: <s>[INST] PF 753 safety torque card fault Summary: Drive faults on safety toque faultWhen safety of the drive is triggered, the drive goes into safety torque fault and cannot be resetted remotely, the fault can only be cleared either clearing the fault on the drive or reset the drive, When changed the safety torque card, the problem does not occur for a few time when safety is triggered, is there any permenant solution other just replacing the card all the time? [/INST] What exactly is your STO fault? What exactly is the safety board you are using? How are you trying to reset the drive fault remotely? Via discrete inputs, or over network connection? How is the safe torque card wired (what opens the safe torque circuits)? The cards work well, if you wire them correctly and use them correctly. Look at page 20 of the link below: https://literature.rockwellautomation.com/idc/groups/literature/documents/um/750-um002_-en-p.pdf Rockwell did a poor job labeling the two pairs of terminals. SP+ / SP- are labeled safety power, and SE+ / SE- are labeled safety enable. However, page 25 shows a typical wiring installation, where the two pairs are used as a dual channel control signal. To me, this is not very intuitive, but you can learn from the diagram on page 25. BOTH channels must be enabled / disabled at the same time. If you open only one, you will get a safe torque fault. Opening both simultaneously does not generate a safe torque FAULT; it simply shuts down the power stage. Closing them simultaneously allows the power stage to be used again without needed a fault reset; the drive is simply ready again. Look at page 332 of the programming manual at the link below: https://literature.rockwellautomation.com/idc/groups/literature/documents/pm/750-pm001_-en-p.pdf Are you getting fault 211? Is there a problem with the voltage you are feeding the safe torque board? \\n </s>