I'm extremely new to ladder logic and I've run into a problem with my first program. For safety sake, I need to ignore input "1" while input "2" is high and then do the opposite, ignore input "2" while input "1" is high. Both situations need only occur for 500ms, then look for the opposite input again. I can make a timer to ignore one input, but my second timer disables the process from functioning. Thanks in advance for any help.