Hi @bclapperton, First I would like to tell you some limitations if you are using the current release SAFEX-C.1x Firmware 1.0.1.29-FPGA211 and ctrlX SAFETY Engineering 1.7.1.8239: EDM block reset is not working, the only way to reset the EDM block is to set the Start/Reset element as "Use as Alarm Reset", but this will reset all your PLC logic (Bug #584752) For the restart of the Restart block you can use a normal Confirm Button, you don't need to use a Start/Reset element (you can use it if you want of course) Because of these limitations I would not recommend to use the logic you posted on the current release sorry 😅 Regarding the application itself, I have 2 things to say: Instead of using the Restart block to control the emergency button you can do this, it has the same effect: Regarding the EDM, the function is to monitor loop feedback for contact multiplication following the cat 4 of EN 954 1, is this your use case? Best Regards, BRamos
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