Controlling Belimo Valves

Belimo valves are one of the most recognised and widely used makes of valve in the HVAC industry.

The libraries on this page provide the tools to control and monitor valves
using the MQTT open controls protocol and Node-RED.

Documents

• Belimo Website
• SR24A-MOD product page and instructions
• Belimo Modbus information

Autowiring

1. Drag parts onto page
2. Wire terminals together either manually, or by pressing Autowire
3. Position parts neatly
4. Reroute messy wires
   

[
{"key":"node","name":"Automation Hat","color":"#1a613d","image":"/images/thumb/1/13/BAH1c.png/800px-BAH1c.png","leftArray":[{"portId":"left0","portColor":"#000000"},{"portId":"left1","portColor":"#ffff00"},{"portId":"left2","portColor":"#000000"},{"portId":"left3","portColor":"#ffff00"},{"portId":"left4","portColor":"#000000"},{"portId":"left5","portColor":"#ffff00"},{"portId":"left6","portColor":"#000000"},{"portId":"left7","portColor":"#ffff00"},{"portId":"left8","portColor":"#000000"},{"portId":"left9","portColor":"#ffff00"},{"portId":"left10","portColor":"#000000"},{"portId":"left11","portColor":"#ffff00"},{"portId":"left12","portColor":"#000000"},{"portId":"left13","portColor":"#ffff00"},{"portId":"left14","portColor":"#000000"},{"portId":"left15","portColor":"#ffff00"}],"topArray":[{"portColor":"#ffffff","portId":"top0"},{"portId":"top1","portColor":"#ffc900"},{"portId":"top2","portColor":"#ffc900"},{"portId":"top3","portColor":"#ffc900"},{"portId":"top4","portColor":"#ffc900"},{"portId":"top5","portColor":"#ffffff"},{"portId":"top6","portColor":"#ffffff"},{"portId":"top7","portColor":"#ffffff"},{"portId":"top8","portColor":"#ffffff"},{"portId":"top9","portColor":"#ffffff"},{"portId":"top10","portColor":"#ffffff"},{"portId":"top11","portColor":"#ffffff"},{"portId":"top12","portColor":"#ffffff"},{"portId":"top13","portColor":"#ffffff"},{"portId":"top14","portColor":"#ffffff"},{"portId":"top15","portColor":"#ffffff"},{"portId":"top16","portColor":"#ffffff"},{"portId":"top17","portColor":"#ffffff"},{"portId":"top18","portColor":"#ffffff"},{"portId":"top19","portColor":"#ffffff"},{"portId":"top20","portColor":"#ff0000"},{"portId":"top21","portColor":"#000001"}],"bottomArray":[{"portColor":"#888888","portId":"bottom0"},{"portId":"bottom1","portColor":"#888889"},{"portId":"bottom2","portColor":"#888890"},{"portId":"bottom11","portColor":"#888891"},{"portId":"bottom12","portColor":"#ffffff"},{"portId":"bottom13","portColor":"#ffffff"},{"portId":"bottom14","portColor":"#ffffff"},{"portId":"bottom15","portColor":"#ffffff"},{"portId":"bottom16","portColor":"#ffffff"},{"portId":"bottom17","portColor":"#ffffff"},{"portId":"bottom18","portColor":"#ff0000"},{"portId":"bottom19","portColor":"#ff0000"},{"portId":"bottom20","portColor":"#ff0000"},{"portId":"bottom21","portColor":"#ff0000"}],"rightArray":[{"portId":"right8","portColor":"#8827e7"},{"portId":"right9","portColor":"#000000"},{"portId":"right10","portColor":"#8827e7"},{"portId":"right11","portColor":"#000000"},{"portId":"right12","portColor":"#8827e7"},{"portId":"right13","portColor":"#000000"},{"portId":"right14","portColor":"#8827e7"},{"portId":"right15","portColor":"#000000"},{"portId":"right0","portColor":"#f6beb6"},{"portId":"right1","portColor":"#000001"},{"portId":"right2","portColor":"#f6beb6"},{"portId":"right3","portColor":"#000001"},{"portId":"right4","portColor":"#f6beb6"},{"portId":"right5","portColor":"#000001"},{"portId":"right6","portColor":"#f6beb6"},{"portId":"right7","portColor":"#000001"}],"textColor":"#efebeb","notes":"","size":"287 160"},
{"name":"Pulsed Flow Sensor","color":"#dbf6cb","pulsesPerLitre":"520","leftArray":[],"rightArray":[{"portId":"right1","portColor":"#ffc900"},{"portId":"right2","portColor":"#000000"},{"portId":"right0","portColor":"#00ffff","signalTypes":["#00ffff","#ffff00"]}],"topArray":[],"bottomArray":[],"key":"FS","size":"82.107421875 53"},
{"name":"Timeclock","color":"#dbf6cb","leftArray":[],"rightArray":[{"portId":"right0","portColor":"#000000"},{"portId":"right1","portColor":"#00ffff","signalTypes":["#00ffff","#ffff00"]}],"topArray":[],"bottomArray":[],"key":"timer","size":"78.78515625 47"},
{"name":"Room Thermostat","color":"#dbf6cb","leftArray":[],"rightArray":[{"portId":"right0","portColor":"#000000"},{"portId":"right1","portColor":"#00ffff","signalTypes":["#00ffff","#ffff00"]}],"topArray":[],"bottomArray":[],"key":"roomstat","size":"78.78515625 47"},
{"name":"Switch","color":"#dbf6cb","leftArray":[{"portId":"left0","portColor":"#00ffff","signalTypes":["#00ffff","#ffff00"]},{"portId":"left1","portColor":"#000000"}],"rightArray":[],"topArray":[],"bottomArray":[],"key":"switch","size":"69 47"},
{"name":"Pressure + Temp Sensor","range":"6 bar","color":"#dbf6cb","leftArray":[],"rightArray":[{"portId":"right1","portColor":"#ffc900"},{"portId":"right2","portColor":"#000000"},{"portId":"right0","portColor":"#8827e7","signalTypes":["#ffff00"]},{"portId":"right3","portColor":"#8827e7","signalTypes":["#ffff00"]}],"topArray":[],"bottomArray":[],"key":"RPS","size":"88 55"},
{"name":"DP + Temp Sensor","range":"300 kPa","color":"#dbf6cb","leftArray":[],"rightArray":[{"portId":"right1","portColor":"#ffc900"},{"portId":"right2","portColor":"#000000"},{"portId":"right0","portColor":"#8827e7","signalTypes":["#ffff00"]},{"portId":"right3","portColor":"#8827e7","signalTypes":["#ffff00"]}],"topArray":[],"bottomArray":[],"key":"DPS","size":"88 55"},
{"name":"Flow + Temp Sensor","range":"4-30 lpm","color":"#dbf6cb","leftArray":[],"rightArray":[{"portId":"right1","portColor":"#ffc900"},{"portId":"right2","portColor":"#000000"},{"portId":"right0","portColor":"#8827e7","signalTypes":["#ffff00"]},{"portId":"right3","portColor":"#8827e7","signalTypes":["#ffff00"]}],"topArray":[],"bottomArray":[],"key":"VFS","size":"88 55"},
{"name":"24v Power","color":"#dbf6cb","leftArray":[{"portId":"left0","portColor":"#ff0000"},{"portId":"left2","portColor":"#000001"}],"rightArray":[],"topArray":[],"bottomArray":[],"key":"24VDC","size":"90 50"},
{"name":"NTC10K","color":"#dbf6cb","leftArray":[],"rightArray":[{"portId":"right0","portColor":"#000000"},{"portId":"right1","portColor":"#00ff00","signalTypes":["#00ff00","#ffff00"]}],"topArray":[],"bottomArray":[],"key":"ntc","size":"58 40"},
{"name":"Modbus Master","color":"#dbf6cb","leftArray":[{"portId":"left0","portColor":"#888891"},{"portId":"left1","portColor":"#888890"}],"rightArray":[],"topArray":[],"bottomArray":[],"key":"modbus1","size":"67 54"},
{"name":"Control Valve (Modbus)","color":"#ff9900","leftArray":[],"rightArray":[],"topArray":[{"portId":"top0","portColor":"#888888"},{"portId":"top1","portColor":"#888889"},{"portId":"top2","portColor":"#ff0000"},{"portId":"top3","portColor":"#000000","signalTypes":["#000001","#000000"]}],"bottomArray":[],"key":"valve","size":"96 59"},
{"name":"Control Valve (0-10V)","color":"#ff9900","leftArray":[],"rightArray":[],"topArray":[{"portId":"top0","portColor":"#8827e7","signalTypes":["#ffff00","#e988e3"]},{"portId":"top1","portColor":"#e988e3","signalTypes":["#8827e7"]},{"portId":"top2","portColor":"#ff0000"},{"portId":"top3","portColor":"#000000"}],"bottomArray":[],"key":"valve","size":"96 59"},
{"name":"Control Valve (Hybrid)","color":"#ff9900","leftArray":[],"rightArray":[],"topArray":[{"portId":"top0","portColor":"#888888"},{"portId":"top1","portColor":"#888889"},{"portId":"top2","portColor":"#8827e7","signalTypes":["#ffff00","#e988e3"]},{"portId":"top3","portColor":"#e988e3","signalTypes":["#8827e7"]},{"portId":"top4","portColor":"#ff0000"},{"portId":"top5","portColor":"#000000","signalTypes":["#000000","#000001"]}],"bottomArray":[],"key":"valve","size":"96 59"},
{"name":"Pump (0-10V)","color":"#dbf6cb","leftArray":[],"rightArray":[],"topArray":[{"portId":"top0","portColor":"#8827e7","signalTypes":["#ffff00","#e988e3"]},{"portId":"top1","portColor":"#e988e3","signalTypes":["#8827e7"]},{"portId":"top2","portColor":"#000000"}],"bottomArray":[],"key":"pump","size":"57.3212890625 52"},{"name":"Sticky Note","color":"#ffffff00","background":"/images/thumb/3/3f/Sticky.png/597px-Sticky.png","leftArray":[],"rightArray":[],"topArray":[],"bottomArray":[],"key":"note","size":"150 150"}
]

{ "class": "GraphLinksModel",
  "copiesArrays": true,
  "copiesArrayObjects": true,
  "linkFromPortIdProperty": "fromPort",
  "linkToPortIdProperty": "toPort",
  "nodeDataArray": [
{"key":"MQTT","name":"mqtt.heatweb.co.uk","color":"#ffffff","image":"/images/5/5f/Cloud1.png","leftArray":[],"topArray":[],"bottomArray":[{"portId":"bottom0","portColor":"#ffffff"}],"rightArray":[],"textColor":"#000000","notes":"","size":"201 80","loc":"70.8125 -87.25"},
{"key":"node","name":"Automation Hat","color":"#1a613d","image":"/images/thumb/1/13/BAH1c.png/800px-BAH1c.png","leftArray":[{"portId":"left0","portColor":"#000000"},{"portId":"left1","portColor":"#ffff00"},{"portId":"left2","portColor":"#000000"},{"portId":"left3","portColor":"#ffff00"},{"portId":"left4","portColor":"#000000"},{"portId":"left5","portColor":"#ffff00"},{"portId":"left6","portColor":"#000000"},{"portId":"left7","portColor":"#ffff00"},{"portId":"left8","portColor":"#000000"},{"portId":"left9","portColor":"#ffff00"},{"portId":"left10","portColor":"#000000"},{"portId":"left11","portColor":"#ffff00"},{"portId":"left12","portColor":"#000000"},{"portId":"left13","portColor":"#ffff00"},{"portId":"left14","portColor":"#000000"},{"portId":"left15","portColor":"#ffff00"}],"topArray":[{"portColor":"#ffffff","portId":"top0"},{"portId":"top1","portColor":"#ffc900"},{"portId":"top2","portColor":"#ffc900"},{"portId":"top3","portColor":"#ffc900"},{"portId":"top4","portColor":"#ffc900"},{"portId":"top5","portColor":"#ffffff"},{"portId":"top6","portColor":"#ffffff"},{"portId":"top7","portColor":"#ffffff"},{"portId":"top8","portColor":"#ffffff"},{"portId":"top9","portColor":"#ffffff"},{"portId":"top10","portColor":"#ffffff"},{"portId":"top11","portColor":"#ffffff"},{"portId":"top12","portColor":"#ffffff"},{"portId":"top13","portColor":"#ffffff"},{"portId":"top14","portColor":"#ffffff"},{"portId":"top15","portColor":"#ffffff"},{"portId":"top16","portColor":"#ffffff"},{"portId":"top17","portColor":"#ffffff"},{"portId":"top18","portColor":"#ffffff"},{"portId":"top19","portColor":"#ffffff"},{"portId":"top20","portColor":"#ff0000"},{"portId":"top21","portColor":"#000001"}],"bottomArray":[{"portColor":"#888888","portId":"bottom0"},{"portId":"bottom1","portColor":"#888889"},{"portId":"bottom2","portColor":"#888890"},{"portId":"bottom11","portColor":"#888891"},{"portId":"bottom12","portColor":"#ffffff"},{"portId":"bottom13","portColor":"#ffffff"},{"portId":"bottom14","portColor":"#ffffff"},{"portId":"bottom15","portColor":"#ffffff"},{"portId":"bottom16","portColor":"#ffffff"},{"portId":"bottom17","portColor":"#ffffff"},{"portId":"bottom18","portColor":"#ff0000"},{"portId":"bottom19","portColor":"#ff0000"},{"portId":"bottom20","portColor":"#ff0000"},{"portId":"bottom21","portColor":"#ff0000"}],"rightArray":[{"portId":"right8","portColor":"#8827e7"},{"portId":"right9","portColor":"#000000"},{"portId":"right10","portColor":"#8827e7"},{"portId":"right11","portColor":"#000000"},{"portId":"right12","portColor":"#8827e7"},{"portId":"right13","portColor":"#000000"},{"portId":"right14","portColor":"#8827e7"},{"portId":"right15","portColor":"#000000"},{"portId":"right0","portColor":"#f6beb6"},{"portId":"right1","portColor":"#000001"},{"portId":"right2","portColor":"#f6beb6"},{"portId":"right3","portColor":"#000001"},{"portId":"right4","portColor":"#f6beb6"},{"portId":"right5","portColor":"#000001"},{"portId":"right6","portColor":"#f6beb6"},{"portId":"right7","portColor":"#000001"}],"textColor":"#efebeb","notes":"","size":"287 160","loc":"-45.84375 177.125"},
{"name":"24v Power","color":"#dbf6cb","leftArray":[{"portId":"left0","portColor":"#ff0000"},{"portId":"left2","portColor":"#000001"}],"rightArray":[],"topArray":[],"bottomArray":[],"key":"24VDC","size":"90 50","loc":"246.15625 41.125"},
{"name":"NTC10K","color":"#dbf6cb","leftArray":[],"rightArray":[{"portId":"right0","portColor":"#000000"},{"portId":"right1","portColor":"#00ff00","signalTypes":["#00ff00","#ffff00"]}],"topArray":[],"bottomArray":[],"key":"ntc","size":"58 40","loc":"-550.84375 31.15625"},
{"name":"NTC10K","color":"#dbf6cb","leftArray":[],"rightArray":[{"portId":"right0","portColor":"#000000"},{"portId":"right1","portColor":"#00ff00","signalTypes":["#00ff00","#ffff00"]}],"topArray":[],"bottomArray":[],"key":"ntc2","size":"58 40","loc":"-548.84375 85.15625"},
{"name":"DP + Temp Sensor","range":"300 kPa","color":"#dbf6cb","leftArray":[],"rightArray":[{"portId":"right2","portColor":"#000000"},{"portId":"right3","portColor":"#8827e7","signalTypes":["#ffff00"]},{"portId":"right0","portColor":"#8827e7","signalTypes":["#ffff00"]},{"portId":"right1","portColor":"#ffc900"}],"topArray":[],"bottomArray":[],"key":"DPS","size":"88 55","loc":"-557.84375 209.15625"},
{"name":"Control Valve (Hybrid)","color":"#ff9900","leftArray":[],"rightArray":[],"topArray":[{"portId":"top0","portColor":"#888888"},{"portId":"top1","portColor":"#888889"},{"portId":"top2","portColor":"#8827e7","signalTypes":["#ffff00","#e988e3"]},{"portId":"top3","portColor":"#e988e3","signalTypes":["#8827e7"]},{"portId":"top4","portColor":"#ff0000"},{"portId":"top5","portColor":"#000000","signalTypes":["#000000","#000001"]}],"bottomArray":[],"key":"valve3","size":"96 59","loc":"-48.6875 437.859375"}
],
  "linkDataArray": [
{"from":"24VDC","to":"node","fromPort":"left0","toPort":"top20","points":[193.15625,36.125,175.15625,36.125,49.15625,36.125,49.15625,53.625,49.15625,71.125,49.15625,89.125]},
{"from":"24VDC","to":"node","fromPort":"left2","toPort":"top21","points":[193.15625,46.125,183.15625,46.125,59.15625,46.125,59.15625,62.625,59.15625,79.125,59.15625,89.125]},
{"from":"MQTT","to":"node","fromPort":"bottom0","toPort":"top16","points":[70.8125,-39.25,70.8125,-25.25,70.8125,-11.0625,9.15625,-11.0625,9.15625,39.125,9.15625,89.125]},
{"from":"ntc","to":"node","fromPort":"right1","toPort":"left1","points":[-512.84375,36.15625,-502.84375,36.15625,-345.59375,36.15625,-345.59375,112.125,-220.34375,112.125,-198.34375,112.125]},
{"from":"ntc","to":"node","fromPort":"right0","toPort":"left0","points":[-512.84375,26.15625,-494.84375,26.15625,-337.59375,26.15625,-337.59375,102.125,-212.34375,102.125,-198.34375,102.125]},
{"from":"ntc2","to":"node","fromPort":"right1","toPort":"left3","points":[-510.84375,90.15625,-500.84375,90.15625,-364.84375,90.15625,-364.84375,132.125,-236.34375,132.125,-198.34375,132.125]},
{"from":"ntc2","to":"node","fromPort":"right0","toPort":"left2","points":[-510.84375,80.15625,-492.84375,80.15625,-356.84375,80.15625,-356.84375,122.125,-228.34375,122.125,-198.34375,122.125]},
{"from":"DPS","to":"node","fromPort":"right3","toPort":"left5","points":[-504.84375,204.15625,-482.84375,204.15625,-369.59375,204.15625,-369.59375,152.125,-288.34375,152.125,-198.34375,152.125]},
{"from":"DPS","to":"node","fromPort":"right0","toPort":"left7","points":[-504.84375,214.15625,-474.84375,214.15625,-357.59375,214.15625,-357.59375,172.125,-272.34375,172.125,-198.34375,172.125]},
{"from":"node","to":"DPS","fromPort":"left4","toPort":"right2","points":[-198.34375,142.125,-296.34375,142.125,-380.84375,142.125,-380.84375,194.15625,-490.84375,194.15625,-504.84375,194.15625]},
{"from":"DPS","to":"node","fromPort":"right1","toPort":"top1","points":[-504.84375,224.15625,-466.84375,224.15625,-320.59375,224.15625,-320.59375,66.125,-140.84375,66.125,-140.84375,88.125]},
{"from":"valve3","to":"node","fromPort":"top3","toPort":"right14","points":[-43.6875,399.359375,-43.6875,373.359375,-43.6875,339.7421875,188.65625,339.7421875,188.65625,162.125,106.65625,162.125]},
{"from":"valve3","to":"node","fromPort":"top2","toPort":"left9","points":[-53.6875,399.359375,-53.6875,369.359375,-53.6875,337.7421875,-256.34375,337.7421875,-256.34375,192.125,-198.34375,192.125]},
{"from":"valve3","to":"node","fromPort":"top1","toPort":"bottom1","points":[-63.6875,399.359375,-63.6875,377.359375,-63.6875,377.359375,-100.84375,377.359375,-100.84375,372.125,-100.84375,266.125]},
{"from":"valve3","to":"node","fromPort":"top0","toPort":"bottom0","points":[-73.6875,399.359375,-73.6875,385.359375,-73.6875,385.359375,-110.84375,385.359375,-110.84375,380.125,-110.84375,266.125]},
{"from":"valve3","to":"node","fromPort":"top5","toPort":"right15","points":[-23.6875,399.359375,-23.6875,389.359375,-23.6875,347.7421875,180.65625,347.7421875,180.65625,172.125,106.65625,172.125]},
{"from":"valve3","to":"node","fromPort":"top4","toPort":"bottom18","points":[-33.6875,399.359375,-33.6875,381.359375,-33.6875,280.15625,-10.84375,280.15625,-10.84375,360.125,-10.84375,266.125]}
]}

Modbus Registers

Note that the register number is one more than address.

Operation Registers

Service Registers

JSON Description

[
    {
        "register": "1",
        "reading": "dat.setpoint",
        "multiplier": "100",
        "datatype": "int16"
    },
    {
        "register": "2",
        "reading": "dat.overrideControl",
        "multiplier": "1",
        "datatype": "int16",
        "values": {
            "0": "none",
            "1": "open",
            "2": "close",
            "3": "min",
            "4": "mid",
            "5": "max"
        }
    },
    {
        "register": "3",
        "reading": "dat.command",
        "multiplier": "1",
        "datatype": "int16"
    },
    {
        "register": "4",
        "reading": "dat.actuatorType",
        "multiplier": "1",
        "datatype": "int16",
        "values": {
            "0": "Actuator Not Connected",
            "1": "Air / Water",
            "2": "VAV / EPIV",
            "3": "Fire",
            "4": "Energy Valve",
            "5": "6way EPIV"
        }
    },
    {
        "register": "5",
        "reading": "dat.relativePosition",
        "multiplier": "100",
        "datatype": "int16",
        "units": "%"
    },
    {
        "register": "6",
        "reading": "dat.absolutePosition",
        "multiplier": "1",
        "datatype": "int16",
        "units": "mm"
    },
    {
        "register": "6",
        "reading": "dat.sensorValue1",
        "multiplier": "1",
        "datatype": "int16"
    },
    {
        "register": "13",
        "reading": "dat.setpointAnalogue",
        "multiplier": "100",
        "datatype": "int16",
        "units": "%"
    },
    {
        "register": "100",
        "reading": "settings.busTermination",
        "multiplier": "1",
        "datatype": "int16",
        "values": {
            "0": "inactive",
            "1": "active"
        }
    },
    {
        "register": "101",
        "reading": "stat.seriesNumberPart1",
        "multiplier": "1",
        "datatype": "int16"
    },
    {
        "register": "102",
        "reading": "stat.seriesNumberPart2",
        "multiplier": "1",
        "datatype": "int16"
    },
    {
        "register": "103",
        "reading": "stat.seriesNumberPart3",
        "multiplier": "1",
        "datatype": "int16"
    },
    {
        "register": "104",
        "reading": "stat.firmwareVirsion",
        "multiplier": "1",
        "datatype": "int16"
    },
    {
        "register": "106",
        "reading": "settings.min",
        "multiplier": "100",
        "datatype": "int16",
        "units": "%"
    },
    {
        "register": "107",
        "reading": "settings.max",
        "multiplier": "100",
        "datatype": "int16",
        "units": "%"
    },
    {
        "register": "108",
        "reading": "settings.sensorType1",
        "multiplier": "1",
        "datatype": "int16",
        "values": {
            "0": "None",
            "1": "Active / Hybrid",
            "2": "Passive_1K",
            "3": "Passive_20K",
            "4": "Switch",
            "5": "PT1000_C",
            "6": "NI1000_C",
            "7": "NTC10K_C",
            "8": "PT1000_F",
            "9": "NI1000_F",
            "10": "NTC10K_F"
        }
    },
    {
        "register": "109",
        "reading": "settings.busFailPosition",
        "multiplier": "1",
        "datatype": "int16",
        "values": {
            "0": "None / Last setpoint",
            "1": "Fast close",
            "2": "Fast open",
            "3": "Mid position"
        }
    },
    {
        "register": "110",
        "reading": "settings.watchdogTimeout",
        "multiplier": "1",
        "datatype": "int16",
        "units": "s"
    }
]

Control Modes

Modbus register 119 is used to set the control mode: 0: Analog 1: Modbus (see example commands).

Modbus Control

The valve setpoint is controlled through register 1.

Analogue Control

The valve setpoint is controlled through the analogue input connection using a 2-10v signal.

Analogue Hybrid Mode

Refers to analogue control with Modbus connected for additional functions.

Wiring

Actuator Wiring

Controller Wiring Modbus Only

Controller Wiring Modbus and Analogue

Connecting via FTDI Cable

A USB-FTDI RS485 cable can be used to connect to the actuator Modbus from a system with USB ports.

FTDI -> Actuator
Orange -> Grey [7]
Yellow -> Pink [6]
Black  -> Not Connected

• https://uk.farnell.com/ftdi/usb-rs485-we-1800-bt/cable-usb-rs485-serial-converter/dp/1740357

Serial Settings

The serial port is setup for a Raspberry Pi's UART (on the header) for use with the Heatweb BEMS Hat. This may need changing in the serial settings to ttyUSB0 if using an FTDI cable, or a COM port if on a PC.

Example Commands

Read Modbus Setpoint

As an example, to read the Setpoint requires sending to the device (1 default) a FC3 read command (3) calling for register 1 (0 0), requesting a single value (0 1), ending with the CRC (Cyclic Redundancy Check).

In modbus the following characters would be sent to the valve over RS485 (shown in decimal and hex):

dec: [ 1, 3, 0, 0, 0, 1, 132, 10 ]  hex: [0x01, 0x03, 0x00, 0x00, 0x00, 0x01, 0x84, 0x0a]

Read Analogue Setpoint

The analogue setpoint register (13) is different from the Modbus setpoint (1). Register 119 (Sepoint Selection) choses which is valid.

dec: [ 1, 3, 0, 12, 0, 1, 68, 9 ]

When reading the analogue setpoint, note that analogue values less than 2v will result in unreadable values (65030+). The valve will still be closed.

Set to Modbus Control

dec: [ 1, 6, 0, 118, 0, 1, 169, 208 ]

Set to Analogue Control

dec:  [ 1, 6, 0, 118, 0, 0, 104, 16 ]

Open Valve 100%

dec: [ 1, 6, 0, 0, 39, 16, 147, 246 ]

Close Valve

dec: [ 1, 6, 0, 0, 0, 0, 137, 202 ]

Quick Start & Testing

For very simple control or setup, Modbus messages can be directly injected to the serial connection as a buffer, including the CRC.

For example, to fully open the valve to 100% setpoint, the inject node would be setup as follows.

Import this example into Node-RED using the JSON below. You can add further inject nodes from examples above.

[{"id":"748c3615.f4aed8","type":"serial out","z":"9f18bf08.c2a65","name":"","serial":"b8be9e6d.b7861","x":2010,"y":200,"wires":[]},{"id":"973c444f7e178e38","type":"inject","z":"9f18bf08.c2a65","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"[1,6,0,0,39,16,147,246]","payloadType":"bin","x":1850,"y":200,"wires":[["748c3615.f4aed8"]]},{"id":"b8be9e6d.b7861","type":"serial-port","serialport":"/dev/ttyAMA0","serialbaud":"38400","databits":"8","parity":"none","stopbits":"2","waitfor":"","dtr":"none","rts":"none","cts":"none","dsr":"none","newline":"50","bin":"bin","out":"time","addchar":"","responsetimeout":"10000"}]

This method is rarely used as it requires one to generate CRC codes in advance.

CRC Calculation

A Cyclic Redundancy Check is a value at the end of a Modbus message that is calculated from the message and can be used to check that received message is uncorrupted.

The following function takes a buffer as an input. For example, in the Close Valve example above, the input is [ 1, 6, 0, 0, 0, 0 ] and the calculated crc value is [137, 202 ].

function crc16(buffer) {

    var crc = 0xFFFF;
    var odd;

    for (var i = 0; i < buffer.length; i++) {
        crc = crc ^ buffer[i];

        for (var j = 0; j < 8; j++) {
            odd = crc & 0x0001;
            crc = crc >> 1;
            if (odd) {
                crc = crc ^ 0xA001;
            }
        }
    }

    crc  = "0000" + crc.toString(16);
    crc = crc.substr(-4);

    return crc;
}

FC3 Read and FC6 Write Register Functions

The following function can be used to read values using FC3 command, and to write values using FC£ command, using pure JavaScript.

It takes an input msg as follows:

msg.payload = { fc:3, address:1, register:1, rlength:1 };   // Read FC3

msg.payload = { fc:6, address:1, register:1, rlength:1, targetv:5000 };   // Write FC6

var address = msg.payload.address || msg.address ||8;
var fc = msg.payload.fc || msg.fc || 3;
var register = msg.payload.register || msg.register || 1;
var rlength = msg.payload.rlength || msg.rlength || 1;
var targetv = msg.targetv; 
 
register = register - 1;  // offset 

var r1 = Math.floor(register / 256);
var r2 = register % 256;


if (fc == 3) {   // Read FC3
    
    var tosend = String.fromCharCode(devAddress) + String.fromCharCode(3);
    tosend += String.fromCharCode(r1) + String.fromCharCode(r2);
    tosend += String.fromCharCode(0) + String.fromCharCode(rlength);
    
    var crcString = crc16(Buffer.from(tosend, 'ascii'));
    tosend += String.fromCharCode(parseInt(crcString.substr(2,2),16)) + String.fromCharCode(parseInt(crcString.substr(0,2),16));    
    msg.payload  = Buffer.from(tosend, 'ascii');    
    
    return msg;


} else if (fc == 6 ) {     // Write FC6


    tosend = String.fromCharCode(address) + String.fromCharCode(6);    
    tosend += String.fromCharCode(r1) + String.fromCharCode(r2);
    
    targetv = parseInt(targetv);
    var hexStringValue  = "0000" + targetv.toString(16);
    hexStringValue = hexStringValue.substr(-4);        
    tosend += String.fromCharCode(parseInt(hexStringValue.substr(0,2),16)) + String.fromCharCode(parseInt(hexStringValue.substr(2,2),16));
        
    crcString = crc16(Buffer.from(tosend, 'ascii'));   
    tosend += String.fromCharCode(parseInt(crcString.substr(2,2),16)) + String.fromCharCode(parseInt(crcString.substr(0,2),16));          
    msg.payload  = Buffer.from(tosend, 'ascii');    
    
    return msg;


} else  { return null; }

Node-RED Flow

The following Node-RED flow is a working example of controlling a Belimo valve.

The serial port is setup for a Raspberry Pi's UART (on the header) for use with the Heatweb BEMS Hat. This may need changing in the serial settings to ttyUSB0 if using an FTDI cable, or a COM port if on a PC.

[{"id":"b2d492ed.c4def","type":"subflow","name":"rbe 3min","info":"","category":"","in":[{"x":80,"y":160,"wires":[{"id":"ee023f13.5958c"}]}],"out":[{"x":460,"y":160,"wires":[{"id":"61b66a77.aec334","port":0}]}],"env":[]},{"id":"61b66a77.aec334","type":"switch","z":"b2d492ed.c4def","name":"","property":"reset","propertyType":"msg","rules":[{"t":"null"}],"checkall":"false","repair":false,"outputs":1,"x":330,"y":160,"wires":[[]]},{"id":"23f9ad60.8b4b82","type":"change","z":"b2d492ed.c4def","name":"","rules":[{"t":"set","p":"reset","pt":"msg","to":"1","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":220,"y":120,"wires":[["ee023f13.5958c"]]},{"id":"44580c0c.eb7c04","type":"inject","z":"b2d492ed.c4def","name":"","repeat":"180","crontab":"","once":false,"onceDelay":"60","topic":"","payload":"","payloadType":"date","x":210,"y":80,"wires":[["23f9ad60.8b4b82"]]},{"id":"ee023f13.5958c","type":"rbe","z":"b2d492ed.c4def","name":"","func":"rbe","gap":"","start":"","inout":"out","property":"payload","x":200,"y":160,"wires":[["61b66a77.aec334"]]},{"id":"9f18bf08.c2a65","type":"tab","label":"Belimo Modbus","disabled":false,"info":"https://www.binaryconvert.com/convert_signed_int.html?hexadecimal=000019FD"},{"id":"19182344.741c9d","type":"function","z":"9f18bf08.c2a65","name":"","func":"//if(Buffer.from(msg.payload, 'ascii')[1]!==3) { return null; }\n\nfunction hex2bin(hex){\n    return (\"00000000\" + (parseInt(hex)).toString(2)).substr(-8);\n}\n\nfunction dec2bin(dec){\n  return (dec >>> 0).toString(2);\n}\n\nvar msg2 = { \"payload\": Buffer.from(msg.payload, 'ascii') };\n\nmsg.address = msg.payload[0];\n//msg.register = (256 * msg.payload[2]) + msg.payload[3];\nmsg.register = flow.get(\"curreg\");\n\n\nminfo = flow.get(\"registers.r\" + msg.register) || null;\ndinfo = flow.get(\"devices.\" + msg.address) || null;\n\nif (!minfo) { return null; }\nif (!dinfo) { return null; }  \n\nif (minfo.datatype==\"bits\") {\n    \n    var oot = {};\n    var bits = minfo.items.split(\",\");\n    var bc=15;\n    for (var bit in bits) {\n    \n        var item = {};\n        item.payload = (256 * msg.payload[3]) + msg.payload[4];        \n        item.payload =   (\"00000000000000000\" + dec2bin(item.payload)).substr(-16);\n        item.payload =  item.payload.substr(bc,1);\n        \n        item.topic = dinfo.device + \"/\" + bits[bit].replace(\".\",\"/\");\n        \n        if (minfo[\"units\"]) { item.units = minfo[\"units\"]; }\n        item.title = (bits[bit].split(\".\")[1]?  bits[bit].split(\".\")[1]:bits[bit]) + \" [Modbus \" + msg.register + \", bit \" + bit + \"]\"; \n\n        if (minfo[\"title\"]) { item.title = minfo[\"title\"] + \", \" + item.title; }\n\n        if (minfo[\"values\"]) {\n            \n            if (minfo[\"values\"][15-bc]) {\n                if (minfo[\"values\"][15-bc][\"\" + item.payload]) { item.payload = minfo[\"values\"][15-bc][\"\" + item.payload]; }\n            }\n        }\n\n\n        \n        oot[item.topic] = item;\n        \n        bc=bc-1;\n\n    }\n    msg.payload = oot;\n    \n    return [null,msg];\n    \n    \n} else {\n    \n   \n           \n    msg.payload = (256 * msg.payload[3]) + msg.payload[4];        \n    msg.payload =  msg.payload / parseFloat(minfo[\"multiplier\"] || 1);\n\n    msg.topic = dinfo.device + \"/\" + minfo[\"reading\"].replace(\".\",\"/\");\n\n\n    if (minfo[\"values\"]) {\n        \n        if (minfo[\"values\"]==\"alarmCodes\") { \n            \n            var ac = flow.get(\"alarmCodes\");\n            if (ac[\"\" + msg.payload]) { msg.payload = ac[\"\" + msg.payload]; }\n        }\n        \n        else if (minfo[\"values\"][\"\" + msg.payload]) { msg.payload = minfo[\"values\"][\"\" + msg.payload]; }\n    }\n\n    if (minfo[\"units\"]) { msg.units = minfo[\"units\"]; }\n    //if (minfo[\"title\"]) { msg.title = minfo[\"title\"]; }\n    \n    \n    if (minfo[\"title\"]) { msg.title = minfo[\"title\"] + \" [Modbus \" + msg.register + \"]\"; }\n    else  { msg.title = (minfo[\"reading\"].split(\".\")[1]?  minfo[\"reading\"].split(\".\")[1] : minfo[\"reading\"]) + \" [Modbus \" + msg.register + \"]\"; }\n\n    return [msg,null];\n    \n}\n\n","outputs":2,"noerr":0,"x":850,"y":760,"wires":[["dc3ca7c5.e94698","86708b96.ef5ad8","5e07fd48.7736c4"],["3e19cbf3.6791d4","5ab178a1.1cde28","86708b96.ef5ad8"]]},{"id":"dc3ca7c5.e94698","type":"debug","z":"9f18bf08.c2a65","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":1070,"y":640,"wires":[]},{"id":"2f4d21d5.a442be","type":"function","z":"9f18bf08.c2a65","name":"Modbus","func":"// http://www.simplymodbus.ca/FC03.htm\n//11 03 006B 0003 7687\n// 11 03 06 AE41 5652 4340 49AD\n\n// uses address 17 as default.\n\n//var offs = 0;\n//if  (msg.payload[0] === 0) { offs = 1; }\nif (!msg.payload) { msg.payload={}; }\n\nvar address = msg.payload.address || msg.address ||8;\nvar fc = msg.payload.fc || msg.fc ;\nvar register = msg.payload.register || msg.register || 1;\nflow.set(\"curreg\", register);\nflow.set(\"fc\", fc);\n\nregister = register - 1;\n\nvar rlength = msg.payload.rlength || msg.rlength || 1;\n\nvar r1 = Math.floor(register / 256);\nvar r2 = register % 256;\n\n\n\n\nvar targetv = msg.targetv; //999;\n\n\nif (fc != 3 && fc != 6) { return null; }\n\nflow.set(\"modbusIn\",\"\");\n\n//targetv = global.get(\"modbus.\"+register+\".value\") || 0;\n\n//targetv = parseInt(global.get(\"modbus.\"+register+\".multiply\") || 1) * targetv;\n\n\nfunction crc16(buffer) {\n    var crc = 0xFFFF;\n    var odd;\n\n    for (var i = 0; i < buffer.length; i++) {\n        crc = crc ^ buffer[i];\n\n        for (var j = 0; j < 8; j++) {\n            odd = crc & 0x0001;\n            crc = crc >> 1;\n            if (odd) {\n                crc = crc ^ 0xA001;\n            }\n        }\n    }\n\n    crc  = \"0000\" + crc.toString(16);\n    crc = crc.substr(-4);\n\n    return crc;\n}\n\nvar tosend = \"\";\nvar crcString =\"\";\nvar msg2={};\n \nif (fc == 3) {   // read\n\n    \n    tosend = String.fromCharCode(address) + String.fromCharCode(3);\n    tosend += String.fromCharCode(r1) + String.fromCharCode(r2);\n    tosend += String.fromCharCode(0) + String.fromCharCode(rlength);\n    \n    crcString = crc16(Buffer.from(tosend, 'ascii'));\n    tosend += String.fromCharCode(parseInt(crcString.substr(2,2),16)) + String.fromCharCode(parseInt(crcString.substr(0,2),16)) ;\n    \n    msg.payload  = Buffer.from(tosend, 'ascii');\n    \n    tosend = \"-\" + tosend;\n    \n    msg2.payload  = Buffer.from(tosend, 'ascii');\n    \n    \n    return [msg,msg2];\n\n} else if (fc == 6 ) {    // write\n\n\n    tosend = String.fromCharCode(address) + String.fromCharCode(6);\n    \n    tosend += String.fromCharCode(r1) + String.fromCharCode(r2);\n    \n    targetv = parseInt(targetv) ;\n    var hexStringValue  = \"0000\" + targetv.toString(16);\n    hexStringValue = hexStringValue.substr(-4);\n    \n    \n    tosend += String.fromCharCode(parseInt(hexStringValue.substr(0,2),16)) + String.fromCharCode(parseInt(hexStringValue.substr(2,2),16)) ;\n    \n    \n    msg.payload  = Buffer.from(tosend, 'ascii');\n    \n    crcString = crc16(msg.payload);\n   \n    tosend += String.fromCharCode(parseInt(crcString.substr(2,2),16)) + String.fromCharCode(parseInt(crcString.substr(0,2),16)) ;\n   \n       \n    msg.payload  = Buffer.from(tosend, 'ascii');\n    tosend = \"-\" + tosend;\n    msg2.payload  = Buffer.from(tosend, 'ascii');\n    \n    \n    return [msg,msg2];\n\n} \n\n\n","outputs":"2","noerr":0,"initialize":"","finalize":"","libs":[],"x":1000,"y":380,"wires":[["e0f88c79.9f4af","7cf5ec60.b4aa74","748c3615.f4aed8"],[]]},{"id":"5175b544.b7200c","type":"serial in","z":"9f18bf08.c2a65","name":"","serial":"b8be9e6d.b7861","x":650,"y":760,"wires":[["38612c3b.f919e4","19182344.741c9d"]]},{"id":"748c3615.f4aed8","type":"serial out","z":"9f18bf08.c2a65","name":"","serial":"b8be9e6d.b7861","x":1210,"y":380,"wires":[]},{"id":"38612c3b.f919e4","type":"debug","z":"9f18bf08.c2a65","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":730,"y":680,"wires":[]},{"id":"7cf5ec60.b4aa74","type":"debug","z":"9f18bf08.c2a65","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":1210,"y":340,"wires":[]},{"id":"6cfb0711.4da528","type":"inject","z":"9f18bf08.c2a65","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"300","crontab":"","once":true,"onceDelay":"20","topic":"","payload":"registers","payloadType":"flow","x":160,"y":240,"wires":[["329d854f.d78aca"]]},{"id":"329d854f.d78aca","type":"function","z":"9f18bf08.c2a65","name":"","func":"\nvar oot = [];\n\nfor (var r in flow.get(\"registers\")) {\n    for (var d in flow.get(\"devices\")) {\n    \n    \n        var item = {};\n        item.fc = 3;\n        item.address = flow.get(\"devices.\"+d+\".address\");\n        item.register = flow.get(\"registers.\"+r+\".register\");\n        item.rlength = 1;\n\n        oot.push(item);\n        \n    }\n    \n}\n\nmsg.payload = oot;\n\nflow.set(\"msglist\",[]);\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":340,"y":240,"wires":[["d3419296.35733"]]},{"id":"bef71e0f.deefb","type":"split","z":"9f18bf08.c2a65","name":"","splt":"\\n","spltType":"str","arraySplt":1,"arraySpltType":"len","stream":false,"addname":"","x":570,"y":300,"wires":[["17020088.5d3acf"]]},{"id":"2a6e4f4c.deb5d","type":"debug","z":"9f18bf08.c2a65","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":630,"y":200,"wires":[]},{"id":"ed2532f3.8b2eb","type":"link out","z":"9f18bf08.c2a65","name":"","links":["72fc070f.39dd8"],"x":1495,"y":680,"wires":[]},{"id":"3e19cbf3.6791d4","type":"split","z":"9f18bf08.c2a65","name":"","splt":"\\n","spltType":"str","arraySplt":1,"arraySpltType":"len","stream":false,"addname":"topic","x":1050,"y":840,"wires":[["72c274fa.6b8f9c"]]},{"id":"349371d0.2b2f3e","type":"debug","z":"9f18bf08.c2a65","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":1370,"y":840,"wires":[]},{"id":"5ab178a1.1cde28","type":"debug","z":"9f18bf08.c2a65","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":1070,"y":800,"wires":[]},{"id":"203b17cc.280718","type":"debug","z":"9f18bf08.c2a65","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":1510,"y":780,"wires":[]},{"id":"44a3fc4e.eb1fe4","type":"function","z":"9f18bf08.c2a65","name":"1 - 119 - Analogue Control","func":"\nmsg.fc = 6;\nmsg.address = 1;\nmsg.register = 119;\nmsg.rlength = 1;\n\nflow.set(\"multiply\", 1);\nflow.set(\"rtopic\", \"test\");\n\n\nmsg.targetv = 0;\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":370,"y":640,"wires":[["33ad8fe7.e6b4"]]},{"id":"cb15d2ed.3f48d","type":"inject","z":"9f18bf08.c2a65","name":"","repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":160,"y":640,"wires":[["44a3fc4e.eb1fe4"]]},{"id":"14e7567b.06d12a","type":"function","z":"9f18bf08.c2a65","name":"1- 1 - Setpoint 0%","func":"\nmsg.fc = 6;\nmsg.address = 1;\nmsg.register = 1;\nmsg.rlength = 1;\n\nflow.set(\"multiply\", 1);\nflow.set(\"rtopic\", \"test\");\n\n\nmsg.targetv = 0;\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":390,"y":500,"wires":[["33ad8fe7.e6b4"]]},{"id":"78197e95.d9a76","type":"inject","z":"9f18bf08.c2a65","name":"","props":[{"p":"payload","v":"","vt":"date"},{"p":"topic","v":"","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":160,"y":500,"wires":[["14e7567b.06d12a"]]},{"id":"10d76ef9.420971","type":"function","z":"9f18bf08.c2a65","name":"Read Key Registers","func":"\n\nvar oot = [];\n\n    for (var d in flow.get(\"devices\")) {\n    \n    \n        var item = {};\n        item.fc = 3;\n        item.address = flow.get(\"devices.\"+d+\".address\");\n        item.register = 5;\n        item.rlength = 1;\n\n        oot.push(item);\n        \n        \n        item = {};\n        item.fc = 3;\n        item.address = flow.get(\"devices.\"+d+\".address\");\n        item.register = 6;\n        item.rlength = 1;\n\n        oot.push(item);\n        \n   \n        \n    }\n    \n\n\nmsg.payload = oot;\n\n\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":380,"y":300,"wires":[["bef71e0f.deefb"]]},{"id":"446f5a59.fe8d44","type":"inject","z":"9f18bf08.c2a65","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"10","crontab":"","once":false,"onceDelay":0.1,"topic":"","payloadType":"date","x":170,"y":300,"wires":[["10d76ef9.420971"]]},{"id":"17020088.5d3acf","type":"function","z":"9f18bf08.c2a65","name":"SHIFT","func":"\nvar msglist=flow.get(\"msglist\") || [];\n\n//if (msglist.length> 100) { msglist = []; }\n    \nif (msg.payload == \"next\") { \n    \n    if (!msglist[0]) { return null; }\n    \n    if (flow.get(\"modbusIn\")===\"\") { return null; }\n    \n    msg = msglist[0];\n    msglist.shift();\n    flow.set(\"msglist\",msglist);\n    return msg;\n}\n\nelse {   \n    \n    msglist.push(msg); \n    flow.set(\"msglist\",msglist);\n    return null;\n    \n}\n\n\n\n\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":830,"y":380,"wires":[["2f4d21d5.a442be"]]},{"id":"5a484812.f02ea8","type":"inject","z":"9f18bf08.c2a65","name":"","props":[{"p":"payload","v":"next","vt":"str"},{"p":"topic","v":"","vt":"string"}],"repeat":"1","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"next","payloadType":"str","x":610,"y":400,"wires":[["17020088.5d3acf"]]},{"id":"86708b96.ef5ad8","type":"link out","z":"9f18bf08.c2a65","name":"","links":["c4e46a82.1c9e7","7518a87f.5d7068"],"x":1015,"y":760,"wires":[]},{"id":"e0f88c79.9f4af","type":"trigger","z":"9f18bf08.c2a65","name":"","op1":"reading","op2":"done","op1type":"str","op2type":"str","duration":"1","extend":true,"units":"s","reset":"","bytopic":"all","outputs":1,"x":1200,"y":460,"wires":[["aa894598.5858c8"]]},{"id":"aa894598.5858c8","type":"change","z":"9f18bf08.c2a65","name":"","rules":[{"t":"set","p":"modbusIn","pt":"flow","to":"xxx","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":1370,"y":460,"wires":[[]]},{"id":"7518a87f.5d7068","type":"link in","z":"9f18bf08.c2a65","name":"","links":["86708b96.ef5ad8"],"x":595,"y":460,"wires":[["e857ae6f.a401"]]},{"id":"e857ae6f.a401","type":"change","z":"9f18bf08.c2a65","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"next","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":720,"y":460,"wires":[["17020088.5d3acf"]]},{"id":"c8c036ab.563c08","type":"inject","z":"9f18bf08.c2a65","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"10","crontab":"","once":true,"onceDelay":0.1,"topic":"","payloadType":"date","x":1010,"y":460,"wires":[["e0f88c79.9f4af"]]},{"id":"85deb34b.0c993","type":"link in","z":"9f18bf08.c2a65","name":"","links":["c330631c.9a504","2db0089.690c2f8","be5ca099.80857","5dbf074d.dd7078","315cd92.2bca026"],"x":635,"y":360,"wires":[["17020088.5d3acf"]]},{"id":"c330631c.9a504","type":"link out","z":"9f18bf08.c2a65","name":"","links":["85deb34b.0c993","479e65f4.abc6cc"],"x":815,"y":560,"wires":[]},{"id":"72c274fa.6b8f9c","type":"function","z":"9f18bf08.c2a65","name":"","func":"msg= msg.payload;\nreturn msg;","outputs":1,"noerr":0,"x":1190,"y":840,"wires":[["349371d0.2b2f3e","e14c6575.623d68"]]},{"id":"e14c6575.623d68","type":"subflow:b2d492ed.c4def","z":"9f18bf08.c2a65","name":"","x":1280,"y":760,"wires":[["ed2532f3.8b2eb","203b17cc.280718"]]},{"id":"89b77ab4.3c2838","type":"function","z":"9f18bf08.c2a65","name":"1 - 1 - Setpoint 50%","func":"\nmsg.fc = 6;\nmsg.address = 1;\nmsg.register = 1;\nmsg.rlength = 1;\n\nflow.set(\"multiply\", 1);\nflow.set(\"rtopic\", \"test\");\n\n\nmsg.targetv = 5000;\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":380,"y":540,"wires":[["33ad8fe7.e6b4"]]},{"id":"4997a59c.4f2acc","type":"inject","z":"9f18bf08.c2a65","name":"","repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":160,"y":540,"wires":[["89b77ab4.3c2838"]]},{"id":"33ad8fe7.e6b4","type":"change","z":"9f18bf08.c2a65","name":"","rules":[{"t":"delete","p":"msglist","pt":"flow"}],"action":"","property":"","from":"","to":"","reg":false,"x":650,"y":560,"wires":[["c330631c.9a504"]]},{"id":"a66bfaa4.b844c8","type":"function","z":"9f18bf08.c2a65","name":"1 - 1 - Setpoint 100%","func":"\nmsg.fc = 6;\nmsg.address = 1;\nmsg.register = 1;\nmsg.rlength = 1;\n\nflow.set(\"multiply\", 1);\nflow.set(\"rtopic\", \"test\");\n\n\nmsg.targetv = 10000;\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":380,"y":580,"wires":[["33ad8fe7.e6b4"]]},{"id":"b646f6a1.46b738","type":"inject","z":"9f18bf08.c2a65","name":"","repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":160,"y":580,"wires":[["a66bfaa4.b844c8"]]},{"id":"2e03727d.2ee90e","type":"delay","z":"9f18bf08.c2a65","name":"","pauseType":"rate","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"allowrate":false,"outputs":1,"x":630,"y":240,"wires":[["17020088.5d3acf"]]},{"id":"d3419296.35733","type":"split","z":"9f18bf08.c2a65","name":"","splt":"\\n","spltType":"str","arraySplt":1,"arraySpltType":"len","stream":false,"addname":"","x":470,"y":240,"wires":[["2e03727d.2ee90e","2a6e4f4c.deb5d"]]},{"id":"655578e3.f19378","type":"change","z":"9f18bf08.c2a65","name":"","rules":[{"t":"set","p":"points","pt":"msg","to":"5000","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":1260,"y":720,"wires":[["ed2532f3.8b2eb"]]},{"id":"5e07fd48.7736c4","type":"switch","z":"9f18bf08.c2a65","name":"","property":"topic","propertyType":"msg","rules":[{"t":"cont","v":"AlarmCode","vt":"str"},{"t":"cont","v":"WarningCode","vt":"str"},{"t":"cont","v":"Position","vt":"str"},{"t":"else"}],"checkall":"true","repair":false,"outputs":4,"x":1050,"y":700,"wires":[["68ad79cd.24fde8","ed2532f3.8b2eb"],["ed2532f3.8b2eb"],["655578e3.f19378"],["e14c6575.623d68"]]},{"id":"6933c8e2.e56078","type":"inject","z":"9f18bf08.c2a65","name":"REGISTERS","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":true,"onceDelay":"10","topic":"","payload":"[{\"register\":\"1\",\"reading\":\"dat.setpoint\",\"multiplier\":\"100\",\"datatype\":\"int16\"},{\"register\":\"2\",\"reading\":\"dat.overrideControl\",\"multiplier\":\"1\",\"datatype\":\"int16\",\"values\":{\"0\":\"none\",\"1\":\"open\",\"2\":\"close\",\"3\":\"min\",\"4\":\"mid\",\"5\":\"max\"}},{\"register\":\"3\",\"reading\":\"dat.command\",\"multiplier\":\"1\",\"datatype\":\"int16\"},{\"register\":\"4\",\"reading\":\"dat.actuatorType\",\"multiplier\":\"1\",\"datatype\":\"int16\",\"values\":{\"0\":\"Actuator Not Connected\",\"1\":\"Air / Water\",\"2\":\"VAV / EPIV\",\"3\":\"Fire\",\"4\":\"Energy Valve\",\"5\":\"6way EPIV\"}},{\"register\":\"5\",\"reading\":\"dat.relativePosition\",\"multiplier\":\"100\",\"datatype\":\"int16\",\"units\":\"%\"},{\"register\":\"6\",\"reading\":\"dat.absolutePosition\",\"multiplier\":\"1\",\"datatype\":\"int16\",\"units\":\"mm\"},{\"register\":\"6\",\"reading\":\"dat.sensorValue1\",\"multiplier\":\"1\",\"datatype\":\"int16\"},{\"register\":\"13\",\"reading\":\"dat.setpointAnalogue\",\"multiplier\":\"100\",\"datatype\":\"int16\",\"units\":\"%\"},{\"register\":\"100\",\"reading\":\"settings.busTermination\",\"multiplier\":\"1\",\"datatype\":\"int16\",\"values\":{\"0\":\"inactive\",\"1\":\"active\"}},{\"register\":\"101\",\"reading\":\"stat.seriesNumberPart1\",\"multiplier\":\"1\",\"datatype\":\"int16\"},{\"register\":\"102\",\"reading\":\"stat.seriesNumberPart2\",\"multiplier\":\"1\",\"datatype\":\"int16\"},{\"register\":\"103\",\"reading\":\"stat.seriesNumberPart3\",\"multiplier\":\"1\",\"datatype\":\"int16\"},{\"register\":\"104\",\"reading\":\"stat.firmwareVirsion\",\"multiplier\":\"1\",\"datatype\":\"int16\"},{\"register\":\"106\",\"reading\":\"settings.min\",\"multiplier\":\"100\",\"datatype\":\"int16\",\"units\":\"%\"},{\"register\":\"107\",\"reading\":\"settings.max\",\"multiplier\":\"100\",\"datatype\":\"int16\",\"units\":\"%\"},{\"register\":\"108\",\"reading\":\"settings.sensorType1\",\"multiplier\":\"1\",\"datatype\":\"int16\",\"values\":{\"0\":\"None\",\"1\":\"Active / Hybrid\",\"2\":\"Passive_1K\",\"3\":\"Passive_20K\",\"4\":\"Switch\",\"5\":\"PT1000_C\",\"6\":\"NI1000_C\",\"7\":\"NTC10K_C\",\"8\":\"PT1000_F\",\"9\":\"NI1000_F\",\"10\":\"NTC10K_F\"}},{\"register\":\"109\",\"reading\":\"settings.busFailPosition\",\"multiplier\":\"1\",\"datatype\":\"int16\",\"values\":{\"0\":\"None / Last setpoint\",\"1\":\"Fast close\",\"2\":\"Fast open\",\"3\":\"Mid position\"}},{\"register\":\"110\",\"reading\":\"settings.watchdogTimeout\",\"multiplier\":\"1\",\"datatype\":\"int16\",\"units\":\"s\"}]","payloadType":"json","x":150,"y":80,"wires":[["95c42acc.304aa8"]]},{"id":"95c42acc.304aa8","type":"split","z":"9f18bf08.c2a65","name":"","splt":"\\n","spltType":"str","arraySplt":1,"arraySpltType":"len","stream":false,"addname":"","x":310,"y":80,"wires":[["29e989ab.124226"]]},{"id":"29e989ab.124226","type":"function","z":"9f18bf08.c2a65","name":"Store Registers","func":"\nvar rin = msg.payload;\nif (rin.register<1) { return null; } \n\n\nvar v = global.get(\"readings.\" + rin.reading + \".value\") || 0\nrin[\"value\"] = v;\n\n\n\nflow.set(\"registers.r\" + rin.register, rin);\n\nmsg.payload = flow.get(\"registers\") ;\n    \nreturn msg;\n\n\n\n\n\n","outputs":1,"noerr":0,"x":480,"y":80,"wires":[[]]},{"id":"6d5c01a3.769db","type":"inject","z":"9f18bf08.c2a65","name":"DEVICES","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":true,"onceDelay":"10","topic":"","payload":"[{\"address\":\"1\",\"device\":\"valveSR1\"}]","payloadType":"json","x":140,"y":140,"wires":[["d0c0d129.1a35f"]]},{"id":"d0c0d129.1a35f","type":"split","z":"9f18bf08.c2a65","name":"","splt":"\\n","spltType":"str","arraySplt":1,"arraySpltType":"len","stream":false,"addname":"","x":310,"y":140,"wires":[["47f84ff5.818ab"]]},{"id":"47f84ff5.818ab","type":"function","z":"9f18bf08.c2a65","name":"Store Devices","func":"\nvar rin = msg.payload;\nif (rin.address<1) { return null; } \n\n\nflow.set(\"devices.\" + rin.address, rin);\n\n\n    \nreturn msg;\n\n\n\n\n\n","outputs":1,"noerr":0,"x":480,"y":140,"wires":[[]]},{"id":"b7ec2cb5.c3f62","type":"link in","z":"9f18bf08.c2a65","name":"","links":["1f335ee0.7b9a41","b09805d5.754898"],"x":195,"y":440,"wires":[["728528de.3f5da8"]]},{"id":"68ad79cd.24fde8","type":"function","z":"9f18bf08.c2a65","name":"","func":"msg.topic = msg.topic.replace(\"/stat/\",\"/alarm/\");\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1280,"y":660,"wires":[["ed2532f3.8b2eb"]]},{"id":"728528de.3f5da8","type":"delay","z":"9f18bf08.c2a65","name":"","pauseType":"rate","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"2","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"allowrate":false,"outputs":1,"x":400,"y":440,"wires":[["33ad8fe7.e6b4"]]},{"id":"52cda5dc3e02a412","type":"function","z":"9f18bf08.c2a65","name":"1 - 119 - Modbus Control","func":"\nmsg.fc = 6;\nmsg.address = 1;\nmsg.register = 119;\nmsg.rlength = 1;\n\nflow.set(\"multiply\", 1);\nflow.set(\"rtopic\", \"test\");\n\n\nmsg.targetv = 1;\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":370,"y":680,"wires":[["33ad8fe7.e6b4"]]},{"id":"45607cf72a252634","type":"inject","z":"9f18bf08.c2a65","name":"","repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":160,"y":680,"wires":[["52cda5dc3e02a412"]]},{"id":"b8be9e6d.b7861","type":"serial-port","serialport":"/dev/ttyAMA0","serialbaud":"38400","databits":"8","parity":"none","stopbits":"2","waitfor":"","dtr":"none","rts":"none","cts":"none","dsr":"none","newline":"50","bin":"bin","out":"time","addchar":"","responsetimeout":"10000"}]