@strato-automation/node-red-contrib-strato-automation/const-node/const.html

Strato Automation Official Node Red Library

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    RED.nodes.registerType('const', {
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        defaults: {
            name: { value: "", label: "name" },
            value: { value: "", required: true, label: "value" },
            topic: { value: "default", required: true, label: "topic" },
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        inputs: 1,
        outputs: 1,
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<script type="text/html" data-template-name="const">
    <!-- Basic Settings -->
    <div class="form-tips" style="margin-bottom: 20px;">
        <b>Basic Settings</b>
    </div>
    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-bookmark"></i> Name</label>
        <input type="text" id="node-input-name" placeholder="Optional name for this constant">
    </div>

    <!-- Value Settings -->
    <div class="form-tips" style="margin: 20px 0;">
        <b>Constant Value</b>
    </div>
    <div style="padding-left: 10px; border-left: 3px solid #ddd;">
        <div class="form-row">
            <label for="node-input-value"><i class="fa fa-hashtag"></i> Value</label>
            <input type="num" id="node-input-value" placeholder="Numeric constant value">
        </div>
    </div>

    <!-- Output Settings -->
    <div class="form-tips" style="margin: 20px 0;">
        <b>Output Settings</b>
    </div>
    <div style="padding-left: 10px; border-left: 3px solid #ddd;">
        <div class="form-row">
            <label for="node-input-topic"><i class="fa fa-tags"></i> Topic</label>
            <input type="text" id="node-input-topic">
        </div>
    </div>

    <div class="form-tips" style="margin-top: 20px;">
        <p><i class="fa fa-info-circle"></i> Tip: The constant value is automatically injected once at startup and on every input message.</p>
    </div>
</script>

<script type="text/html" data-help-name="const">
    <p>A node that outputs a constant numeric value, both automatically at startup and when triggered by an input message.</p>

    <h3>Inputs</h3>
    <dl class="message-properties">
        <dt>payload <span class="property-type">any</span></dt>
        <dd>Any input triggers the constant value output (payload is ignored)</dd>
        
        <dt>topic <span class="property-type">string</span></dt>
        <dd>Input topic is ignored, output uses configured topic</dd>
    </dl>

    <h3>Outputs</h3>
    <dl class="message-properties">
        <dt>payload <span class="property-type">number</span></dt>
        <dd>The configured constant value</dd>
        
        <dt>topic <span class="property-type">string</span></dt>
        <dd>The configured topic name</dd>
        
        <dt>__srcid <span class="property-type">string</span></dt>
        <dd>The node's identifier</dd>
    </dl>

    <h3>Configuration</h3>
    <dl class="message-properties">
        <dt>Name <span class="property-type">string</span></dt>
        <dd>Optional name to identify the node in the flow</dd>
        
        <dt>Value <span class="property-type">number</span></dt>
        <dd>The constant numeric value to output</dd>
        
        <dt>Topic <span class="property-type">string</span></dt>
        <dd>Topic identifier for the output messages</dd>
    </dl>

    <h3>Status</h3>
    <dl class="message-properties">
        <dt>Grey dot</dt>
        <dd>Shows the configured topic name</dd>
    </dl>

    <h3>Details</h3>
    <p>This node provides a way to inject a constant numeric value into a flow. It operates in two modes:</p>

    <h4>Operation Modes</h4>
    <ul>
        <li><b>Startup Injection:</b> The constant value is automatically sent once after a 3-second delay when the flow starts</li>
        <li><b>Triggered Injection:</b> The constant value is sent whenever the node receives an input message</li>
    </ul>

    <h4>Use Cases</h4>
    <ul>
        <li>Providing fixed setpoints or thresholds</li>
        <li>Initializing variables in a flow</li>
        <li>Creating reference values</li>
        <li>Setting default parameters</li>
    </ul>

    <p>The node always converts the configured value to a number before sending it, ensuring consistent output type.</p>
</script>