There are three additional virtual signals known as logic signals. Three icons: a check mark, an informational letter 'i', and a small, white dot.Nine colors: red, green, blue, yellow, magenta, cyan, white, grey, and black.The 36 alphanumeric characters (A-Z, 0-9).There are currently 48 virtual signals that can be sent over the circuit network: Instead, these virtual signals serve as user-definable channels for the circuit network they hold whatever meaning the user wants them to. In addition to the standard item signals, Factorio's circuit network also includes a set of signals that do not represent any particular game item. Virtual Signals available for use in the circuit network In in most cases however, it is more useful to use the opposing color of the wire so that it will not interfere with the resulting output and input. Combinators will sum the red and green inputs prior to calculation, so either color can be used when wiring the output back to the input. When cross-connecting combinators, it is good practice to use the unused color to cross-connect, this will split the input and output networks and prevent unwanted inputs from accidentally connecting to a larger circuit network. If the signal is different, it will be carried in that wire as well, but as a different signal. This behavior is important to remember and can result in sequencing errors and significant delays when multiple combinators are connected in series.Ĭircuit wires act like a wire bus in electronics it carries information in the connected wires, meaning that if there are similar signals on a wire it will add them automatically. So when a decider combinator is used to detect a certain input condition, it's output value will not take effect on the circuit network until the next step. When logic values are computed by combinators, the outputs are not recognized by the circuit network until the following step. Combinator logic works because Factorio only updates at 60 times per second, such that combinators analyze their logic in a step, and then sum and/or decide the resulting output values on the next step. While advanced logic requires a multitude of combinators, some very useful basic logic can be achieved using only a handful of combinators. Combinator logic is achieved by cross-connecting outputs to inputs in such a way to achieve the desired logic.
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