Heute können fast alle PV Wechselrichter das ModBUS TCP Protokoll. Nur wenige Hersteller von Wechselrichter machen das nicht. So auch der Kostal PIKO 5.5. Hier werden die Daten wie Spannung und Leitung nur auf dem Webinterface angezeigt.
Möchte oder muss man diese Daten aber mit andere Systeme verbinden, so muss man einen anderen Weg gehen. Im aktuellen Fall benötigt das NTUITY Energiemanagementsystem ausschließlich Modbus.
Ein Weg, um die Daten dem NTUITY Energiemanagementsystem aufzubereiten ist Node-RED. Node-RED bringt alle Module mit sich, um die Daten per Webabfrage abzuholen und dann über einen eignen Modbus Server zur Verfügung zu stellen.
Unten im Beitrag ist der Code dazu. Man muss nur das Passwort im „Kostal“ Webabfrage Modul reintragen und schon sollte der Modbus Server die Daten bereitstellen.
In diesem Beispiel werden die Daten auch noch an den ioBroker gesendet. Diese sind die blauen „Kostal“ Module. Wer die Daten für den ioBroker nicht benötigt, kann alle Kostal Module aus dem Flow herauslösen.
Zu Beachten ist, dass die unteren „Kostal L1 A“, „Kostal L2 A“ „Kostal L3 A“ Daten aus dem ioBroker kommen. Die Ampere werden in der Kostal Weboberfläche nicht angezeigt. Wir rechen hier im ioBroker per Skript die Watt und Volt auf Ampere zurück und übergeben sie dann wieder über Node-RED an den Modbus Server.
Man kann die Ampere auch direkt im Node-RED umrechnen. Vorausgesetzt, dass man die Ampere überhaupt benötigt.
Hier der Flow zum Importieren.
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"z": "309eaed8.c5d87a",
"name": "To Modbus",
"func": "function float32ToUint16(value) { \n var buffer = new ArrayBuffer(4);\n var intView = new Uint16Array(buffer);\n var floatView = new Float32Array(buffer);\n\n floatView[0] = value;\n \n\n return [intView[0], intView[1]];\n}\n\n//var incoming = JSON.parse(msg.payload);\n\n//Compose ModBus message (Holding Registers) READ/WRITE\nvar modbusHR = {\n payload : {\n 'value' : [\n float32ToUint16(msg.payload)[0], \n float32ToUint16(msg.payload)[1],\n ],\n 'fc' : 6,\n 'unitid' : 1,\n 'address' : 172,\n 'quantity' : 2\n }\n};\n\n\n\n\nnode.send([modbusHR]);",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1370,
"y": 100,
"wires": [
[
"ddd22ffe.f5cc38",
"e813f2bb.21687"
]
]
},
{
"id": "c2ce206e.25574",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 173",
"topic": "",
"dataType": "HoldingRegister",
"adr": "173",
"server": "c47e1b8e.aa0fd",
"x": 1790,
"y": 120,
"wires": []
},
{
"id": "12d75216.ffcac6",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "To Modbus",
"func": "function float32ToUint16(value) { \n var buffer = new ArrayBuffer(4);\n var intView = new Uint16Array(buffer);\n var floatView = new Float32Array(buffer);\n\n floatView[0] = value;\n \n\n return [intView[0], intView[1]];\n}\n\n//var incoming = JSON.parse(msg.payload);\n\n//Compose ModBus message (Holding Registers) READ/WRITE\nvar modbusHR1 = {\n payload : {\n 'value' : [\n float32ToUint16(msg.payload)[0], \n float32ToUint16(msg.payload)[1],\n ],\n 'fc' : 6,\n 'unitid' : 1,\n 'address' : 322,\n 'quantity' : 2\n }\n};\n\n\n\n\nnode.send([modbusHR1]);",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1370,
"y": 240,
"wires": [
[
"f6a2a608.45601",
"12c0d35e.c71d4d"
]
]
},
{
"id": "12c0d35e.c71d4d",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[1];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1610,
"y": 280,
"wires": [
[
"246f2a0f.55efae"
]
]
},
{
"id": "f6a2a608.45601",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[0];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1610,
"y": 200,
"wires": [
[
"36bedf36.815068"
]
]
},
{
"id": "36bedf36.815068",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 322",
"topic": "",
"dataType": "HoldingRegister",
"adr": "322",
"server": "c47e1b8e.aa0fd",
"x": 1790,
"y": 180,
"wires": []
},
{
"id": "246f2a0f.55efae",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 323",
"topic": "",
"dataType": "HoldingRegister",
"adr": "323",
"server": "c47e1b8e.aa0fd",
"x": 1790,
"y": 260,
"wires": []
},
{
"id": "386f4cba.5700bc",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "To Modbus",
"func": "function float32ToUint16(value) { \n var buffer = new ArrayBuffer(4);\n var intView = new Uint16Array(buffer);\n var floatView = new Float32Array(buffer);\n\n floatView[0] = value;\n \n\n return [intView[0], intView[1]];\n}\n\n//var incoming = JSON.parse(msg.payload);\n\n//Compose ModBus message (Holding Registers) READ/WRITE\nvar modbusHR = {\n payload : {\n 'value' : [\n float32ToUint16(msg.payload)[0], \n float32ToUint16(msg.payload)[1],\n ],\n 'fc' : 6,\n 'unitid' : 1,\n 'address' : 158,\n 'quantity' : 2\n }\n};\n\n\n\n\nnode.send([modbusHR]);",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1350,
"y": 440,
"wires": [
[
"2c04140.7f9cd6c",
"50acbeed.91793"
]
]
},
{
"id": "50acbeed.91793",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[1];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1590,
"y": 480,
"wires": [
[
"4460fe43.d30ef8"
]
]
},
{
"id": "2c04140.7f9cd6c",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[0];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1590,
"y": 400,
"wires": [
[
"9e8a4c02.76b018"
]
]
},
{
"id": "4460fe43.d30ef8",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 159",
"topic": "",
"dataType": "HoldingRegister",
"adr": "159",
"server": "c47e1b8e.aa0fd",
"x": 1770,
"y": 460,
"wires": []
},
{
"id": "9e8a4c02.76b018",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 158",
"topic": "",
"dataType": "HoldingRegister",
"adr": "158",
"server": "c47e1b8e.aa0fd",
"x": 1770,
"y": 380,
"wires": []
},
{
"id": "cbc61193.22b7b",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "To Modbus",
"func": "function float32ToUint16(value) { \n var buffer = new ArrayBuffer(4);\n var intView = new Uint16Array(buffer);\n var floatView = new Float32Array(buffer);\n\n floatView[0] = value;\n \n\n return [intView[0], intView[1]];\n}\n\n//var incoming = JSON.parse(msg.payload);\n\n//Compose ModBus message (Holding Registers) READ/WRITE\nvar modbusHR = {\n payload : {\n 'value' : [\n float32ToUint16(msg.payload)[0], \n float32ToUint16(msg.payload)[1],\n ],\n 'fc' : 6,\n 'unitid' : 1,\n 'address' : 164,\n 'quantity' : 2\n }\n};\n\n\n\n\nnode.send([modbusHR]);",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1390,
"y": 580,
"wires": [
[
"26b3a0fd.f0a0d8",
"3b3bc15d.13f09e"
]
]
},
{
"id": "3b3bc15d.13f09e",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[1];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1630,
"y": 620,
"wires": [
[
"8e20d684.403508"
]
]
},
{
"id": "26b3a0fd.f0a0d8",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[0];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1630,
"y": 540,
"wires": [
[
"4faf6361.d34d74"
]
]
},
{
"id": "4faf6361.d34d74",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 164",
"topic": "",
"dataType": "HoldingRegister",
"adr": "164",
"server": "c47e1b8e.aa0fd",
"x": 1810,
"y": 520,
"wires": []
},
{
"id": "8e20d684.403508",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 165",
"topic": "",
"dataType": "HoldingRegister",
"adr": "165",
"server": "c47e1b8e.aa0fd",
"x": 1810,
"y": 600,
"wires": []
},
{
"id": "de8c6dee.b64ca8",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "To Modbus",
"func": "function float32ToUint16(value) { \n var buffer = new ArrayBuffer(4);\n var intView = new Uint16Array(buffer);\n var floatView = new Float32Array(buffer);\n\n floatView[0] = value;\n \n\n return [intView[0], intView[1]];\n}\n\n//var incoming = JSON.parse(msg.payload);\n\n//Compose ModBus message (Holding Registers) READ/WRITE\nvar modbusHR5 = {\n payload : {\n 'value' : [\n float32ToUint16(msg.payload)[0], \n float32ToUint16(msg.payload)[1],\n ],\n 'fc' : 6,\n 'unitid' : 1,\n 'address' : 170,\n 'quantity' : 2\n }\n};\n\n\n\n\nnode.send([modbusHR5]);",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1390,
"y": 740,
"wires": [
[
"a45583b8.5c3a8",
"7db2b9fb.711648"
]
]
},
{
"id": "7db2b9fb.711648",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[1];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1630,
"y": 780,
"wires": [
[
"d4b09e30.029c48"
]
]
},
{
"id": "a45583b8.5c3a8",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[0];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1630,
"y": 700,
"wires": [
[
"25dc9174.0fcc66"
]
]
},
{
"id": "25dc9174.0fcc66",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 170",
"topic": "",
"dataType": "HoldingRegister",
"adr": "170",
"server": "c47e1b8e.aa0fd",
"x": 1810,
"y": 680,
"wires": []
},
{
"id": "d4b09e30.029c48",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 171",
"topic": "",
"dataType": "HoldingRegister",
"adr": "171",
"server": "c47e1b8e.aa0fd",
"x": 1810,
"y": 760,
"wires": []
},
{
"id": "b026a9a6.997b4",
"type": "ioBroker get",
"z": "309eaed8.c5d87a",
"name": "Kostal L1 A",
"topic": "0_userdata.0.Kostal.Kostal-L1-A",
"attrname": "payload",
"payloadType": "value",
"x": 650,
"y": 900,
"wires": [
[
"9e6a9011.af90c"
]
]
},
{
"id": "6980a6b.24dd558",
"type": "ioBroker get",
"z": "309eaed8.c5d87a",
"name": "Kostal L2 A",
"topic": "0_userdata.0.Kostal.Kostal-L2-A",
"attrname": "payload",
"payloadType": "value",
"x": 650,
"y": 1040,
"wires": [
[
"8af0f4d2.bb49c"
]
]
},
{
"id": "36346009.d2d3e",
"type": "ioBroker get",
"z": "309eaed8.c5d87a",
"name": "Kostal L3 A",
"topic": "0_userdata.0.Kostal.Kostal-L3-A",
"attrname": "payload",
"payloadType": "value",
"x": 650,
"y": 1140,
"wires": [
[
"e0bfcbab.01e618"
]
]
},
{
"id": "9e6a9011.af90c",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "To Modbus",
"func": "function float32ToUint16(value) { \n var buffer = new ArrayBuffer(4);\n var intView = new Uint16Array(buffer);\n var floatView = new Float32Array(buffer);\n\n floatView[0] = value;\n \n\n return [intView[0], intView[1]];\n}\n\n//var incoming = JSON.parse(msg.payload);\n\n//Compose ModBus message (Holding Registers) READ/WRITE\nvar modbusHR = {\n payload : {\n 'value' : [\n float32ToUint16(msg.payload)[0], \n float32ToUint16(msg.payload)[1],\n ],\n 'fc' : 6,\n 'unitid' : 1,\n 'address' : 154,\n 'quantity' : 2\n }\n};\n\n\n\n\nnode.send([modbusHR]);",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1050,
"y": 900,
"wires": [
[
"a329a190.de7ef",
"f0212bfd.442f8"
]
]
},
{
"id": "a329a190.de7ef",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[0];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1290,
"y": 860,
"wires": [
[
"82b7ff53.b1936"
]
]
},
{
"id": "f0212bfd.442f8",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[1];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1290,
"y": 940,
"wires": [
[
"8ede7e53.a95b1"
]
]
},
{
"id": "82b7ff53.b1936",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 154",
"topic": "",
"dataType": "HoldingRegister",
"adr": "154",
"server": "c47e1b8e.aa0fd",
"x": 1470,
"y": 840,
"wires": []
},
{
"id": "8ede7e53.a95b1",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 155",
"topic": "",
"dataType": "HoldingRegister",
"adr": "155",
"server": "c47e1b8e.aa0fd",
"x": 1470,
"y": 920,
"wires": []
},
{
"id": "8af0f4d2.bb49c",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "To Modbus",
"func": "function float32ToUint16(value) { \n var buffer = new ArrayBuffer(4);\n var intView = new Uint16Array(buffer);\n var floatView = new Float32Array(buffer);\n\n floatView[0] = value;\n \n\n return [intView[0], intView[1]];\n}\n\n//var incoming = JSON.parse(msg.payload);\n\n//Compose ModBus message (Holding Registers) READ/WRITE\nvar modbusHR = {\n payload : {\n 'value' : [\n float32ToUint16(msg.payload)[0], \n float32ToUint16(msg.payload)[1],\n ],\n 'fc' : 6,\n 'unitid' : 1,\n 'address' : 160,\n 'quantity' : 2\n }\n};\n\n\n\n\nnode.send([modbusHR]);",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1010,
"y": 1040,
"wires": [
[
"affa067b.f004f8",
"9c2d089c.ced32"
]
]
},
{
"id": "affa067b.f004f8",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[0];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1250,
"y": 1000,
"wires": [
[
"a71b6f6d.32203"
]
]
},
{
"id": "9c2d089c.ced32",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[1];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1250,
"y": 1080,
"wires": [
[
"bcaf20c1.24daa"
]
]
},
{
"id": "a71b6f6d.32203",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 160",
"topic": "",
"dataType": "HoldingRegister",
"adr": "160",
"server": "c47e1b8e.aa0fd",
"x": 1430,
"y": 980,
"wires": []
},
{
"id": "bcaf20c1.24daa",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 161",
"topic": "",
"dataType": "HoldingRegister",
"adr": "161",
"server": "c47e1b8e.aa0fd",
"x": 1430,
"y": 1060,
"wires": []
},
{
"id": "e0bfcbab.01e618",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "To Modbus",
"func": "function float32ToUint16(value) { \n var buffer = new ArrayBuffer(4);\n var intView = new Uint16Array(buffer);\n var floatView = new Float32Array(buffer);\n\n floatView[0] = value;\n \n\n return [intView[0], intView[1]];\n}\n\n//var incoming = JSON.parse(msg.payload);\n\n//Compose ModBus message (Holding Registers) READ/WRITE\nvar modbusHR = {\n payload : {\n 'value' : [\n float32ToUint16(msg.payload)[0], \n float32ToUint16(msg.payload)[1],\n ],\n 'fc' : 6,\n 'unitid' : 1,\n 'address' : 166,\n 'quantity' : 2\n }\n};\n\n\n\n\nnode.send([modbusHR]);",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1010,
"y": 1160,
"wires": [
[
"1adc4b2.f8add35",
"46dd08cf.389a9"
]
]
},
{
"id": "1adc4b2.f8add35",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[0];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1250,
"y": 1120,
"wires": [
[
"a8259674.fa6ed"
]
]
},
{
"id": "46dd08cf.389a9",
"type": "function",
"z": "309eaed8.c5d87a",
"name": "link",
"func": "var newMsg = msg.payload.value[1];\n\nmsg.payload = newMsg;\nreturn msg;\n\n\n",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 1250,
"y": 1200,
"wires": [
[
"c9e98851.dd55b8"
]
]
},
{
"id": "a8259674.fa6ed",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 166",
"topic": "",
"dataType": "HoldingRegister",
"adr": "166",
"server": "c47e1b8e.aa0fd",
"x": 1430,
"y": 1100,
"wires": []
},
{
"id": "c9e98851.dd55b8",
"type": "modbustcp-write",
"z": "309eaed8.c5d87a",
"name": "ModBus 167",
"topic": "",
"dataType": "HoldingRegister",
"adr": "167",
"server": "c47e1b8e.aa0fd",
"x": 1430,
"y": 1180,
"wires": []
},
{
"id": "3acb41ca.a04a0e",
"type": "modbus-server",
"z": "309eaed8.c5d87a",
"name": "Modbus2022",
"logEnabled": false,
"hostname": "0.0.0.0",
"serverPort": "502",
"responseDelay": 100,
"delayUnit": "ms",
"coilsBufferSize": 10000,
"holdingBufferSize": 10000,
"inputBufferSize": 10000,
"discreteBufferSize": 10000,
"showErrors": false,
"x": 1050,
"y": 1340,
"wires": [
[],
[],
[],
[],
[]
]
},
{
"id": "de147d29.2ecff8",
"type": "inject",
"z": "309eaed8.c5d87a",
"name": "",
"props": [
{
"p": "payload"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"payload": "",
"payloadType": "str",
"x": 850,
"y": 1320,
"wires": [
[
"3acb41ca.a04a0e"
]
]
},
{
"id": "c47e1b8e.aa0fd",
"type": "modbustcp-server",
"name": "Modbus Server",
"host": "127.0.0.1",
"port": "502",
"unit_id": "1",
"reconnecttimeout": ""
}
]ioBroker Node-RED
Node-Red und ioBroker laufen bei uns in einem Docker Container unter Windows Server 2022 Hyper-V
