Trace the complete impact chain of a PLC signal (tag, I/O point, or address) — where it's written, where it's read, every interlock it gates, every alarm it feeds, every HMI element that displays it. Use when Boss asks "what does this signal do?", "if I change this tag, what breaks?", or "trace this fault back to its root cause". Wraps the right Nexus tools in a single guided pass so nothing gets missed.
