Example flow from 3.0.0 and above - since v0.17.5 of Node-RED, please try also the Node-RED->Import->Examples->modbus
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node-red-contrib-modbus example flow
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[ | |
{ | |
"id": "278c3ffc.fa40d8", | |
"type": "tab", | |
"label": "Modbus HTTP", | |
"disabled": false, | |
"info": "" | |
}, | |
{ | |
"id": "f4e4d112.5e3708", | |
"type": "modbus-getter", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"showStatusActivities": false, | |
"showErrors": false, | |
"unitid": "", | |
"dataType": "HoldingRegister", | |
"adr": "0", | |
"quantity": "4", | |
"server": "228160dd.0bd268", | |
"useIOFile": false, | |
"ioFile": "", | |
"useIOForPayload": false, | |
"x": 410, | |
"y": 190, | |
"wires": [ | |
[ | |
"18f09288.c552b5", | |
"b3bee6f8.64944" | |
], | |
[ | |
"f61cd2bb.db0808" | |
] | |
] | |
}, | |
{ | |
"id": "867bcf5a.728988", | |
"type": "http in", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"url": "/modbus/flex/read", | |
"method": "get", | |
"upload": false, | |
"swaggerDoc": "", | |
"x": 190, | |
"y": 340, | |
"wires": [ | |
[ | |
"a06133ba.054e9" | |
] | |
] | |
}, | |
{ | |
"id": "18f09288.c552b5", | |
"type": "debug", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"active": true, | |
"console": "false", | |
"complete": "true", | |
"x": 770, | |
"y": 130, | |
"wires": [] | |
}, | |
{ | |
"id": "f61cd2bb.db0808", | |
"type": "modbus-response", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"registerShowMax": 20, | |
"x": 680, | |
"y": 170, | |
"wires": [] | |
}, | |
{ | |
"id": "a06133ba.054e9", | |
"type": "modbus-flex-getter", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"showStatusActivities": false, | |
"showErrors": false, | |
"server": "228160dd.0bd268", | |
"x": 430, | |
"y": 340, | |
"wires": [ | |
[ | |
"4c623588.f2d704", | |
"ad5c1f3d.c60f" | |
], | |
[ | |
"d42d9e3.9a23ae" | |
] | |
] | |
}, | |
{ | |
"id": "d42d9e3.9a23ae", | |
"type": "modbus-response", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"registerShowMax": 20, | |
"x": 670, | |
"y": 330, | |
"wires": [] | |
}, | |
{ | |
"id": "4c623588.f2d704", | |
"type": "debug", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"active": true, | |
"console": "false", | |
"complete": "true", | |
"x": 750, | |
"y": 290, | |
"wires": [] | |
}, | |
{ | |
"id": "33c8f5aa.a03022", | |
"type": "catch", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"scope": null, | |
"x": 650, | |
"y": 80, | |
"wires": [ | |
[ | |
"df84382d.4327b8" | |
] | |
] | |
}, | |
{ | |
"id": "ad380629.c0b74", | |
"type": "modbus-flex-server", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"logEnabled": false, | |
"serverPort": "18502", | |
"responseDelay": 100, | |
"unitId": 1, | |
"delayUnit": "ms", | |
"coilsBufferSize": 20000, | |
"registersBufferSize": 20000, | |
"minAddress": 0, | |
"splitAddress": 10000, | |
"funcGetCoil": "function getFlexCoil(addr, unitID) {\n\tif (unitID === node.unitId && \n\t\taddr >= node.minAddress && \n\t\taddr <= node.splitAddress * 2) { \n\n\t\treturn node.coils.readUInt8(addr * node.bufferFactor) \n\t} \n}", | |
"funcGetInputRegister": "function getFlexInputRegister(addr, unitID) { \n\tif (unitID === node.unitId && \n\t\taddr >= node.minAddress && \n\t\taddr <= node.splitAddress) { \n\n\t\treturn node.registers.readUInt16BE(addr * node.bufferFactor) \n\t} \n}", | |
"funcGetHoldingRegister": "function getFlexHoldingRegsiter(addr, unitID) { \n\tif (unitID === node.unitId && \n\t\taddr > node.splitAddress && \n\t\taddr <= node.splitAddress * 2) { \n\n\t\treturn node.registers.readUInt16BE(addr * node.bufferFactor) \n\t} \n}", | |
"funcSetCoil": "function setFlexCoil(addr, value, unitID) { \n\tif (unitID === node.unitId && \n\t\taddr >= node.minAddress && \n\t\taddr <= node.splitAddress * 2) { \n\n\t\tnode.coils.writeUInt8(value, addr * node.bufferFactor) \n\t} \n}", | |
"funcSetRegister": "function setFlexRegister(addr, value, unitID) { \n\tif (unitID === node.unitId && \n\t\taddr >= node.minAddress && \n\t\taddr <= node.splitAddress * 2) { \n\n\t\tnode.registers.writeUInt16BE(value, addr * node.bufferFactor) \n\t} \n}", | |
"x": 200, | |
"y": 70, | |
"wires": [ | |
[], | |
[], | |
[] | |
] | |
}, | |
{ | |
"id": "ad5c1f3d.c60f", | |
"type": "http response", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"statusCode": "", | |
"headers": {}, | |
"x": 630, | |
"y": 290, | |
"wires": [] | |
}, | |
{ | |
"id": "f566f9bf.dbec68", | |
"type": "http in", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"url": "/modbus/read", | |
"method": "get", | |
"upload": false, | |
"swaggerDoc": "", | |
"x": 180, | |
"y": 190, | |
"wires": [ | |
[ | |
"f4e4d112.5e3708" | |
] | |
] | |
}, | |
{ | |
"id": "b3bee6f8.64944", | |
"type": "http response", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"statusCode": "", | |
"headers": {}, | |
"x": 640, | |
"y": 130, | |
"wires": [] | |
}, | |
{ | |
"id": "df84382d.4327b8", | |
"type": "debug", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"active": true, | |
"console": "false", | |
"complete": "true", | |
"x": 800, | |
"y": 80, | |
"wires": [] | |
}, | |
{ | |
"id": "af9361fe.87ea18", | |
"type": "modbus-flex-write", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"showStatusActivities": false, | |
"showErrors": false, | |
"server": "228160dd.0bd268", | |
"x": 420, | |
"y": 530, | |
"wires": [ | |
[ | |
"3540312d.5017c6" | |
], | |
[ | |
"b0288009.f96ae8" | |
] | |
] | |
}, | |
{ | |
"id": "fdbc5e3e.e35fb8", | |
"type": "modbus-write", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"showStatusActivities": false, | |
"showErrors": false, | |
"unitid": "", | |
"dataType": "HoldingRegister", | |
"adr": "0", | |
"quantity": "1", | |
"server": "228160dd.0bd268", | |
"x": 410, | |
"y": 440, | |
"wires": [ | |
[ | |
"b33411ba.b3b498" | |
], | |
[ | |
"75fa26b3.414c" | |
] | |
] | |
}, | |
{ | |
"id": "4f9b6223.e98aa4", | |
"type": "http in", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"url": "/modbus/write", | |
"method": "get", | |
"upload": false, | |
"swaggerDoc": "", | |
"x": 180, | |
"y": 440, | |
"wires": [ | |
[ | |
"fdbc5e3e.e35fb8" | |
] | |
] | |
}, | |
{ | |
"id": "b33411ba.b3b498", | |
"type": "http response", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"statusCode": "", | |
"headers": {}, | |
"x": 640, | |
"y": 400, | |
"wires": [] | |
}, | |
{ | |
"id": "75fa26b3.414c", | |
"type": "modbus-response", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"registerShowMax": 20, | |
"x": 680, | |
"y": 440, | |
"wires": [] | |
}, | |
{ | |
"id": "1e4aafb.8f1855", | |
"type": "http in", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"url": "/modbus/flex/write", | |
"method": "get", | |
"upload": false, | |
"swaggerDoc": "", | |
"x": 190, | |
"y": 530, | |
"wires": [ | |
[ | |
"af9361fe.87ea18" | |
] | |
] | |
}, | |
{ | |
"id": "3540312d.5017c6", | |
"type": "http response", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"statusCode": "", | |
"headers": {}, | |
"x": 640, | |
"y": 490, | |
"wires": [] | |
}, | |
{ | |
"id": "b0288009.f96ae8", | |
"type": "modbus-response", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"registerShowMax": 20, | |
"x": 680, | |
"y": 530, | |
"wires": [] | |
}, | |
{ | |
"id": "69788b37.05c614", | |
"type": "comment", | |
"z": "278c3ffc.fa40d8", | |
"name": "HTTP request GET working examples", | |
"info": "## Read\n\n### Flex Read\n\nhttp://localhost:1880/modbus/flex/read?value=0&unitid=1&fc=3&address=0&quantity=1\n\nhttp://localhost:1880/modbus/flex/read?value=0&unitid=1&fc=4&address=0&quantity=1\n\nhttp://localhost:1880/modbus/flex/read?value=0&unitid=1&fc=3&address=0&quantity=5\n\nhttp://localhost:1880/modbus/flex/read?value=0&unitid=1&fc=4&address=0&quantity=5\n\n### Read\n\nhttp://localhost:1880/modbus/read\n\n## Write\n\n### Test HTTP without Modbus\n\nhttp://localhost:1880/modbus/flex/write/test?value=[1,2,3,4,5]&unitid=1&fc=16&address=0&quantity=5\n\n\n### Flex Write\n\nhttp://localhost:1880/modbus/flex/write?value=10&unitid=1&fc=6&address=0&quantity=1\n\nhttp://localhost:1880/modbus/flex/write?value=[1,2,3,4,5]&unitid=1&fc=16&address=0&quantity=5\n\n### Write\n\nhttp://localhost:1880/modbus/write\n", | |
"x": 240, | |
"y": 140, | |
"wires": [] | |
}, | |
{ | |
"id": "a3dd6f31.9eb17", | |
"type": "http in", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"url": "/modbus/flex/write/test", | |
"method": "get", | |
"upload": false, | |
"swaggerDoc": "", | |
"x": 220, | |
"y": 620, | |
"wires": [ | |
[ | |
"efac3450.e15668" | |
] | |
] | |
}, | |
{ | |
"id": "d88e2d99.cd96e", | |
"type": "debug", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"active": true, | |
"console": "false", | |
"complete": "true", | |
"x": 590, | |
"y": 620, | |
"wires": [] | |
}, | |
{ | |
"id": "efac3450.e15668", | |
"type": "function", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"func": "if (msg.payload.value && msg.payload.value.indexOf(',') > -1) {\n msg.payload.value = JSON.parse(msg.payload.value)\n}\n\nif (msg.value && msg.value.indexOf(',') > -1) {\n msg.value = JSON.parse(msg.payload.value)\n}\nreturn msg;", | |
"outputs": 1, | |
"noerr": 0, | |
"x": 450, | |
"y": 620, | |
"wires": [ | |
[ | |
"d88e2d99.cd96e", | |
"d20d5d26.f4c1a" | |
] | |
] | |
}, | |
{ | |
"id": "d20d5d26.f4c1a", | |
"type": "http response", | |
"z": "278c3ffc.fa40d8", | |
"name": "", | |
"statusCode": "", | |
"headers": {}, | |
"x": 590, | |
"y": 660, | |
"wires": [] | |
}, | |
{ | |
"id": "228160dd.0bd268", | |
"type": "modbus-client", | |
"z": "278c3ffc.fa40d8", | |
"name": "Modbus Flex Server", | |
"clienttype": "tcp", | |
"bufferCommands": true, | |
"stateLogEnabled": false, | |
"tcpHost": "127.0.0.1", | |
"tcpPort": "18502", | |
"tcpType": "DEFAULT", | |
"serialPort": "/dev/ttyUSB", | |
"serialType": "RTU-BUFFERD", | |
"serialBaudrate": "9600", | |
"serialDatabits": "8", | |
"serialStopbits": "1", | |
"serialParity": "none", | |
"serialConnectionDelay": "100", | |
"unit_id": "1", | |
"commandDelay": "1", | |
"clientTimeout": "1000", | |
"reconnectTimeout": "2000" | |
} | |
] |
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just working from v0.6.0 and above