RTC Table Example

A table is used to describe the relationship between a set of input values and output values.

The following example shows the RTC for controlling the operation of a pump according to the volume in a chamber, by using a table to define the relationship between chamber level and volume.

Under this example, a pump is operated depending on the volume at a node.

The relationship between the height above datum and the volume at the node is defined in a Table in the RTC.

The RTC is defined by adding components to a valve regulator in the RTC Window Editor.

This simple example could, of course, be modelled without the use of a Table by controlling the pump on height above datum at node D instead of the volume. However, tables used in this way may be required in more complex cases; for example, tables can be used to compare volumes in two tanks, where the volume in the tanks does not change uniformly with depth.

For an example of how the use of Tables can be extended, see RTC Example.

Component	Parameters	Effect
RANGE 1	Range type: Z - Height above datum Location node: D Minimum: Maximum:	TRUE if height above datum is between - / + infinity
TABLE 1	Measurement: Volume Input Range: RANGE 1 Type: LINEAR Input/Output grid: Height above datum vs Volume	Relationship between range type defined in RANGE 1  and Volume at RANGE 1 location
RANGE 2	Range type: Variable Location Definition: TABLE 1 Minimum: 100m3 Maximum:	TRUE if volume is greater than or equal to 100 m3
RULE 1	Condition: _default_ Rule type: OFF	DEFAULT status of pump is OFF
RULE 2	Condition: RANGE 2 Rule type: ON	Switch pump ON if RANGE 2 is TRUE

1. Range 1: Defines node D as the control point

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2. Table 1: Defines the relationship between the depth at node D and the volume at node D

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3. Range 2: Operates the pump according to the volume at node D

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4. Rule 1: Pump is switched OFF by default

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5. Rule 2: Pump is switched ON when volume at node D is greater than or equal to 100 m3

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For a further example of an RTC  Scenario, see RTC Example.