Functional description

If the STO function is activated due to a limit value violation of a safety subfunction, the internal safe digital output F-DO_STO and all safe digital outputs F-DO assigned to the STO/SBC function are disabled immediately.

If the STO function is activated due to a limit value violation of a safety subfunction, the internal safe digital output F-DO_STO is disabled immediately.

When the STO safety subfunction is activated, the internal safe digital output F-DO_STO and the safe digital outputs F-DO assigned to the STO function are disabled immediately. In the basic device, the function block FCB 01 Output stage inhibit is activated and the status STO is set.

If the STO function is deactivated, the internal safe digital output F-DO_STO and all safe digital outputs F-DO assigned to the STO/SBC function are activated immediately.

If a limit value violation of a safety subfunction, a system error, or an output error occurs during the brake application delay, the brake application time is immediately stopped and the internal safe digital output F-DO_STO and all safe digital outputs F‑DO assigned to the STO function are disabled. The safe digital outputs F-DO assigned to the SBC function are already disabled.

If the parameter SBC enable is set to "yes", all safe digital outputs F-DO assigned to the SBC function will be disabled immediately when the STO function is activated. Once the time defined in the parameter Brake application time has elapsed, the internal safe digital output F-DO_STO and all safe digital outputs F‑DO assigned to the STO function are disabled with a delay.