82 lines
3.2 KiB
HTML
82 lines
3.2 KiB
HTML
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<script type="text/javascript">
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RED.nodes.registerType('watt2kwh',{
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category: 'function',
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color: '#A6BBCF',
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defaults: {
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format: {value:"kwh"},
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maximum: {value:"60", validator: function(v) { return !v || !isNaN(v)}},
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maximumunit: {value:"mins"},
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name: {value:""}
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},
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inputs:1,
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outputs:1,
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icon: "power.png",
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label: function() {
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return this.name||"watt2kwh";
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}
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});
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</script>
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<script type="text/x-red" data-template-name="watt2kwh">
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<div class="form-row">
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<label for="node-input-name"><i class="icon-tag"></i> Name</label>
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<input type="text" id="node-input-name" placeholder="Name">
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</div>
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<div class="form-row">
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<label for="node-input-format"><i class="fa fa-envelope"></i> Output Format</label>
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<select id="node-input-format">
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<option value="j">joule</option>
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<option value="kj">kilojoule</option>
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<option value="wh">watt hour</option>
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<option value="kwh">kilowatt hour</option>
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<option value="mwh">megawatt hour</option>
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</select>
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</div>
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<div class="form-row">
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<label for="node-input-maximum"><i class="fa fa-history"></i> Timeout</label>
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<input type="number" id="node-input-maximum" style="width:180px;">
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<select id="node-input-maximumunit" style="width:120px;">
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<option value="secs">Seconds</option>
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<option value="mins">Minutes</option>
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<option value="hours">Hours</option>
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</select>
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</div>
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</script>
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<script type="text/x-red" data-help-name="watt2kwh">
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<h2 id="noderedcontribwatt2kwh">node-red-contrib-watt2kwh</h2>
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<p>A node specifically written to convert power (watts) to energy (kWh).</p>
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<h3 id="inputs">Inputs</h3>
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<p>The node accepts a msg.payload input in the format of a number (example 6) or a string (example "6") provided that the string only contains numbers.</p>
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<h3 id="outputs">Outputs</h3>
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<p>The msg.payload contains the energy output, which can be set in the node config to be;</p>
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<ul>
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<li>Joules</li>
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<li>Watt hour</li>
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<li>Kilowatt hour or</li>
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<li>Megawatt hour</li>
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</ul>
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<h3 id="details">Details</h3>
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<p>As the calculation is dependent upon the relationship between the amount of power used, (or generated) <strong>and</strong> the interval between consecutive data points; <strong>interval x power = energy</strong> the very first value fed into the node will not produce an output, because the node requires a second value to be able to calculate the interval between the two values. </p>
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<p>After subsequent feed inputs, the node will output the corresponding energy used or generated within that interval. </p>
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<p>The Timeout setting in the node's configuration, should be set to at least the maximum interval between successive readings. This is to avoid the situation where for example, a sensor is taken off line, develops a fault or there is a communication problem, resulting in a break of several hours between readings and the calculation - <strong>interval x power = energy</strong> would then be inaccurate.</p>
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<p>For example flows - see the <a href="https://github.com/Paul-Reed/node-red-contrib-watt2kwh/">README</a></p>
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</script>
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