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Active Vent

Properties
Stacks	Yes (5)
Recipe
Created With	Hydraulic Pipe Bender, Fabricator
Cost	5g Iron, 1g Gold, 5g Copper

Active Vent

Operation
Power Usage	100W
Construction
Placed with	Active Vent (Item)
Placed on	Small Grid
Stage 1
Deconstruction
Deconstructed with	Hand Drill
Item received	Active Vent (Item)

Description

Used to move gasses from pipes, by using its inward or outward switches. It needs to be powered to function.

Active vents have a build-in pressure sensor and will use it to try to set the room pressure to the value of the "PressureExternal" parameter. A vent operating in Outward mode will stop when the pressure is greater than or equal to this value. A vent operating in Inward mode will stop when the pressure is less than or equal to this value. It seems to be very good about hitting the target pressure. This parameter is set to its default values every time the mode switch is used, so when adjusting it in MIPS code remember to set the Mode first, and then set PressureExternal. Default values are 101kPa for Outward and 0kPa for Inward.

This reset behavior can be inconvenient on worlds like Loulan whose atmosphere is well above 101kPa. Manually-operated "airlocks" for greenhouses can not pump back up to Loulan atmosphere during the exit cycle. If the pressure is already >101kPa the vent will have no effect, and if it is <101kPa the vent will stop when it reaches 101kPa.

To calculate the moles per tick, use the following equation: n = (P * V) / (R * T) (These do not take into account the constraints imposed by "PressureExternal" and "PressureInternal")

Where (Inward vent):

• P = Min(Room pressure, 10.1325)
• V = 8000
• n = Moles per tick
• R = Gas constant (8.3144)
• T = Room temperature

Where (Outward vent):

• P = Min(Pipe pressure, 10.1325)
• V = Pipe volume
• n = Moles per tick
• R = Gas constant (8.3144)
• T = Pipe temperature

Note: The insert slot currently takes any item and seems to have no effect.

Data Network Properties

These are all Data Network properties of this device.

Mode Values

These lists the values and meanings for the "Mode" property of the Active Vent.

Value	Meaning
0	"Outward" mode (Pumping gas from the connected pipe network to the outside.)
1	"Inward" mode (Pumping gas from the outside to the connected pipe network.)
2	(Unknown)

Data Parameters

These are all parameters that can be written with a Logic Writer, Batch Writer, or Integrated Circuit (IC10).

Parameter Name	Data Type	Description
Open	Boolean	Does not function.
Mode	Integer	Sets the Active Vent mode to the passed setting. (See Mode Values)
PressureExternal	Float	Sets the desired room pressure. The vent will stop pumping in order to not go "beyond" this value (where "beyond" has opposite meanings for Inward/Outward). The vent will still consume energy when pressure is reached.
PressureInternal	Float	Sets the desired pipe pressure. The vent will stop pumping in order to not go "beyond" this value (where "beyond" has opposite meanings for Inward/Outward). The vent will still consume energy when pressure is reached.
Lock	Boolean	Locks the Active Vent, when set to 1. Unlocks it, when set to 0.
Setting	Float	Does not function.
On	Boolean	Turns the Active Vent on, when set to 1. Turns it off, when set to 0.

Data Outputs

These are all parameters, that can be read with a Logic Reader or a Slot Reader. The outputs are listed in the order a Logic Reader's "VAR" setting cycles through them.

Output Name	Data Type	Description
Power	Boolean	Returns whether the Active Vent is receiving power and is turned on. (0 for no, 1 for yes)
Open	Boolean	Returns whether the Active Vent is open. (0 for no, 1 for yes) (Untested)
Mode	Integer	Returns the setting of the current mode of the Active Vent. (See Mode Values)
Error	Boolean	Returns whether the Active Vent is currently flashing an error. (0 for no, 1 for yes)
PressureExternal	Float	Returns the desired external pressure of the Active Vent.
PressureInternal	Float	Returns the desired internal pressure of the Active vent. (Untested)
Lock	Boolean	Returns whether the Active Vent is locked. (0 for no, 1 for yes)
Setting	Float	Returns a range from 0.0 to 100.0. (Assumption) Returns the percentage amount of pumping throughput of the Active Vent.
Maximum	Integer	Returns 100. (Assumption) Returns the maximum throughput percentage of the Active Vent.
Ratio	Float	Returns a range from 0.0 to 1.0. (Assumption) Returns the percentage amount of pumping throughput of the Active Vent.
On	Boolean	Returns whether the Active Vent is set to on. (0 for no, 1 for yes)
RequiredPower	Integer	Returns the current amount of power needed for the Active Vent.