node-red-nodes/function/PID/pidcontrol.html

<script type="text/html" data-template-name="PID control">
    <div class="form-row">
        <label for="node-input-target" style="width:120px;"><i class="fa fa-dot-circle-o"></i> Set Point</label>
        <input type="text" id="node-input-target" placeholder="target value" style="width:60%;">
    </div>
    <div class="form-row">
        <label for="node-input-kp" style="width:120px;"><font size=+1>K<sub>proportional</sub></font></label>
        <input type="text" id="node-input-kp" placeholder="proportional gain constant - Kp" style="width:60%;">
    </div>
    <div class="form-row">
        <label for="node-input-ki" style="width:120px;"><font size=+1>K<sub>integral</sub></font></label>
        <input type="text" id="node-input-ki" placeholder="integral gain constant - Ki" style="width:60%;">
    </div>
    <div class="form-row">
        <label for="node-input-kd" style="width:120px;"><font size=+1>K<sub>differential</sub></font></label>
        <input type="text" id="node-input-kd" placeholder="differential gain constant - Kd" style="width:60%;">
    </div>
    <div class="form-row">
        <label for="node-input-name" style="width:120px;"><i class="fa fa-tag"></i> Name</label>
        <input type="text" id="node-input-name" placeholder="Name" style="width:60%;">
    </div>
    <div class="form-tips"><b>Tip:</b> This node ONLY works on numbers<br>
    The damping factors are typically in the range 0 - 1.<br></div>
</script>

<script type="text/javascript">
    RED.nodes.registerType('PID control',{
        color:"#d6ba48",
        category: 'function',
        defaults: {
            name: {value:""},
            target: {value:"",validate:RED.validators.regex(/^(\d*|)$/)},
            kp: {value:"",required:true,validate:RED.validators.number()},
            ki: {value:"",required:true,validate:RED.validators.number()},
            kd: {value:"",required:true,validate:RED.validators.number()}
        },
        inputs:1,
        outputs:1,
        icon: "function.png",
        label: function() {
            return this.name||"PID";
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        }
    });
</script>