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<div id="projectname">EPANET
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 <span id="projectnumber">2.2.0</span>
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<li class="navelem"><a class="el" href="_files.html">Toolkit Files</a></li><li class="navelem"><a class="el" href="_inp_file.html">Input File</a></li><li class="navelem"><a class="el" href="_rules_page.html">[RULES]</a></li> </ul>
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<div class="title">Condition Clauses </div> </div>
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<div class="textblock"><p>A condition clause in a <a class="el" href="_rules_page.html">Rule-Based Control</a> takes the form of:</p>
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<p>  <em>object  id  attribute  relation  value</em> <br />
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</p>
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<p>where </p><table style="border: 0px solid black">
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<tr>
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<td><em>object    </em> </td><td>= </td><td>  a category of network object </td></tr>
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<td><em>id    </em> </td><td>= </td><td>  the object's ID label </td></tr>
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<tr>
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<td><em>attribute  </em> </td><td>= </td><td>  an attribute or property of the object </td></tr>
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<tr>
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<td><em>relation   </em> </td><td>= </td><td>  a relational operator </td></tr>
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<tr>
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<td><em>value    </em> </td><td>= </td><td>  an attribute value </td></tr>
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</table>
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<p>Some example conditional clauses are:<br />
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<code>  JUNCTION 23 PRESSURE > 20</code> <br />
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<code>  TANK T200 FILLTIME BELOW 3.5</code> <br />
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<code>  LINK 44 STATUS IS OPEN</code> <br />
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<code>  SYSTEM CLOCKTIME = 7:30 AM</code> <br />
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<code>  SYSTEM DEMAND >= 1500</code> <br />
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</p>
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<p>Objects can be any of the following keywords:<br />
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<b>  NODE  JUNCTION  TANK  RESERVOIR</b><br />
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<b>  LINK  PIPE  PUMP  VALVE</b><br />
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<b>  SYSTEM</b></p>
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<p>When <b>SYSTEM</b> is used in a condition no ID is supplied.</p>
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<p>The following attributes can be used with Node-type objects: <br />
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<b>   DEMAND</b><br />
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<b>   HEAD</b><br />
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<b>   PRESSURE</b></p>
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<p>The following attributes can be used with Tanks: <br />
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<b>   LEVEL</b><br />
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<b>   FILLTIME </b> (hours needed to fill a tank) <br />
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<b>   DRAINTIME</b> (hours needed to empty a tank)</p>
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<p>These attributes can be used with Link-Type objects: <br />
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<b>   FLOW</b><br />
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<b>   STATUS  (OPEN, CLOSED, or ACTIVE)</b> <br />
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<b>   SETTING </b> (pump speed or valve setting)</p>
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<p>The <b>SYSTEM</b> object can use the following attributes: </p><table style="border: 0px solid black">
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<tr>
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<td><b>   DEMAND</b></td><td>(total system demand) </td></tr>
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<tr>
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<td><b>   TIME</b></td><td>(hours from the start of the simulation expressed </td></tr>
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<tr>
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<td><b>   </b></td><td>either as a decimal number or in hours:minutes format) </td></tr>
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<tr>
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<td><b>   CLOCKTIME</b></td><td> (24-hour clock time with <b>AM</b> or <b>PM</b> appended) </td></tr>
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</table>
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<p>Relation operators consist of the following: <br />
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</p><table style="border: 0px solid black">
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<tr>
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<td>  <b>=</b> </td><td><b>IS</b> </td></tr>
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<tr>
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<td>  <b><></b> </td><td><b>NOT</b> </td></tr>
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<tr>
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<td>  <b><</b> </td><td><b>BELOW</b> </td></tr>
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<tr>
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<td>  <b>></b> </td><td><b>ABOVE</b> </td></tr>
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<tr>
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<td>  <b><=</b> </td></tr>
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<tr>
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<td>  <b>>=</b> </td></tr>
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</table>
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