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Editing User:SL/Logic Gates
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* Refilling a pool to 7/7 from another water source is (usually) safe. | * Refilling a pool to 7/7 from another water source is (usually) safe. | ||
* Running a pump on top of a pool which is connected to a water source is, however, NOT safe. | * Running a pump on top of a pool which is connected to a water source is, however, NOT safe. | ||
+ | * <s>Even though the pump's output is surrounded by walls, it WILL result in a catastrophic overflow (Let's call it a "superflood"): If all the water in the pool is 7/7 and the tile above it also fills up to 7/7, it seems to cause the water around the pump's output (even though it is walled in) to create water above itself if it is below the pump's z level. This expands in a circle (if there's no terrain, walls, etc, in the way), generating water until the all accessible tiles (without going above the pump's z level) are filled with water. Even worse is that shutting off the connection to the original water source (river, etc) will not stop the flooding! Somehow this turns your pump into an unlimited water generator. Shutting off the power to the pump or blocking the input with a hatch appears to stop the infinite water generation, however. A safety pressure plate (NOT walled in) built next to the gate, linked to the input hatch and set to water 0-0 will serve to arrest any superflood in the very early stages, but once the water evaporates it will open the hatch, and it will likely begin flooding again for a second or two if you haven't taken measures to prevent it.</s> (This was a bug, it should be fixed now) | ||
* If you want to build gates on murky pools or dwarf-made cisterns, the best thing to do is to provide a means of disabling all the gates remotely (lever linked to gear assemblies between the gates and power, for instance), and provide a connection to an infinite source (river, brook, aquifer, or the like) via a floodgate which is controlled by another lever. Disable your gates prior to refilling, then open the floodgate to refill, then close the floodgate to disconnect the pool from the water source, and only then re-enable the gates. The pressurization and overflow problem can (theoretically) only occur on a murky pool if something refills the pool while there is water in the logic gates (But I'm not 100% certain about that). | * If you want to build gates on murky pools or dwarf-made cisterns, the best thing to do is to provide a means of disabling all the gates remotely (lever linked to gear assemblies between the gates and power, for instance), and provide a connection to an infinite source (river, brook, aquifer, or the like) via a floodgate which is controlled by another lever. Disable your gates prior to refilling, then open the floodgate to refill, then close the floodgate to disconnect the pool from the water source, and only then re-enable the gates. The pressurization and overflow problem can (theoretically) only occur on a murky pool if something refills the pool while there is water in the logic gates (But I'm not 100% certain about that). | ||
* Make sure your refiller's source (pumps are sources, or a water source if it's directly connected to it without pumps) is on the same z level as the pool, or you will likely cause a castastrophic overflow even if you don't have any gates on top of it. | * Make sure your refiller's source (pumps are sources, or a water source if it's directly connected to it without pumps) is on the same z level as the pool, or you will likely cause a castastrophic overflow even if you don't have any gates on top of it. |