Description
W.A.L.D.O.R.F., or "Wall Automation Legion-Dispatching Offense-Repulsing Functionary" is a control mechanism for the S.T.A.T.L.E.R. wall-maintenance system. W.A.L.D.O.R.F. detect attacks on walls and dispatches bots after acid has cleared. This will help to reduce tragic losses of bot life.
The substations and accumulators act as an electricity network isolator: https://wiki.factorio.com/Accumulator#Isolation_of_Power_Networks.
When laser turrets on the north side are firing, the power draw through the isolator will cause accumulators to drop below 100%. This will start the timer labeled "Power Switch". While this 5-second timer is running, the power switch will close, short-circuiting the isolator and allowing the (now-firing) laser turrets full access to your main electrical network for the duration of the timer.
Once the Power Switch timer completes, a second, 40-second timer labelled "Recent Danger" will begin counting down. This timer is 40 seconds long to allow ample time for acid puddles to dissipate (acid puddles dissipate in 30 seconds). If during the Recent Danger timer another attack occurs, the Power Switch timer will activate and the Recent Danger timer will reset. This is to keep bots from being released during a protracted attack.
Once the Recent Danger timer is complete, the rising edge detector on the south side of the blueprint will send a single pulse of "Green: 1" to the third timer, labelled "Release Bots". This timer will last for 5 seconds and will send a "Construction robot: 1" signal to the substation on north side of the blueprint for the duration.
This signal will be used to activate inserters in S.T.A.T.L.E.R. walls to place Construction Robots into roboports all along the length of your wall.