i am looking at a way of calling a output on only if the main program or robot has been inactive for 3 hours or more, just want to add a gas purge if the robot has not been used for a while as when we restart the arc welding robot the first part off is full of porosity due to lack of gas. i know i can put a non return valve on gas pipe to see if that stops it but i,m also curious to see if this can be done in case the return valve does not work.
Regards