Read/Write ExtensionObject (data type) between NX102 & PLCnext using OPC UA & REST api.

[Maxime771]

Hi, this is how I try to establish read/write communication for a structure variable between an NX102 & PLCnext.

I am using OPC UA protocol to read a data structure from the NX102 as shown below :
My DataType that I want to read/write :

In UaExpert, we can see the following information :

In Node-Red, I can read '' staaMCtest '' and its members from the NX102.

Using the fonction "Map to PLCnext", I can write each member of staaMCtest to the PLCnext structure :

In the PLCnext, we can see that the value are correctly written in ''teststruc'' of type MyStruct :

I set the variable teststruc as a HMI tag, so it can use the REST data interface.

Since the value of staaMCtest (NX102) and teststruc (PLCnext) can be change in both PLC, I want to send the value of teststruc back to staaMCtest (NX102) :

We can see that the content in the msg payload of ''debug 6" is the same as the content in "debug 1" (showed in previous image)

My issue is writing via the function bloc "Omron NX102 Client Write". I got this error :

Any ideas how can we solve this issue?

[Maxime771]

Were the Node-RedFlow :
[
{
"id": "b0d5c20d2c81e15a",
"type": "tab",
"label": "Flow 1",
"disabled": false,
"info": "",
"env": []
},
{
"id": "49cca7a35053b110",
"type": "OpcUa-Client",
"z": "b0d5c20d2c81e15a",
"endpoint": "40fb7f127b35e0f0",
"action": "read",
"deadbandtype": "a",
"deadbandvalue": 1,
"time": 10,
"timeUnit": "s",
"certificate": "n",
"localfile": "",
"localkeyfile": "",
"securitymode": "None",
"securitypolicy": "None",
"useTransport": false,
"maxChunkCount": 1,
"maxMessageSize": 8192,
"receiveBufferSize": 8192,
"sendBufferSize": 8192,
"name": "Omron NX102 Client Read",
"x": 200,
"y": 180,
"wires": [
[
"2e8343ce1a45409c",
"f0a7e671e6104770"
],
[]
]
},
{
"id": "2e8343ce1a45409c",
"type": "debug",
"z": "b0d5c20d2c81e15a",
"name": "debug 1",
"active": false,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "payload",
"targetType": "msg",
"statusVal": "",
"statusType": "auto",
"x": 460,
"y": 160,
"wires": []
},
{
"id": "5c269e11d32f8ade",
"type": "inject",
"z": "b0d5c20d2c81e15a",
"name": "",
"props": [
{
"p": "payload"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "ns=4;s=aaMC_testStructure;datatype=staaMCtest",
"payload": "",
"payloadType": "date",
"x": 100,
"y": 100,
"wires": [
[
"49cca7a35053b110"
]
]
},
{
"id": "b9c293015b1d7ff2",
"type": "comment",
"z": "b0d5c20d2c81e15a",
"name": "READ STRUC - From NX102",
"info": "\n",
"x": 140,
"y": 60,
"wires": []
},
{
"id": "ead8e219006a71bb",
"type": "plc-write-variables",
"z": "b0d5c20d2c81e15a",
"plc_connector": "e6ec980a1af28a84",
"vars": "",
"var_list": "{"items":[]}",
"searchbar": "",
"x": 350,
"y": 340,
"wires": [
[
"f0701750cbc2f454",
"85728191a581a00b"
]
]
},
{
"id": "f0a7e671e6104770",
"type": "function",
"z": "b0d5c20d2c81e15a",
"name": "Map to PLCnext",
"func": "// @ts-nocheck\n\nresult = msg.payload;\n\nTest= {\n variables: [\n { "path": "Arp.Plc.Eclr/teststruct.testbool", "value": result.testbool, "valueType": "Constant"},\n { "path": "Arp.Plc.Eclr/teststruct.testreal", "value": result.testreal, "valueType": "Constant"},\n { "path": "Arp.Plc.Eclr/teststruct.testword", "value": result.testword, "valueType": "Constant"}\n ]\n };\n \nfor (let i = 0; i <= result.testarrbool.length; i++){\n Test.variables.push({\n "path": Arp.Plc.Eclr/teststruct.testarrbool[${i}],\n "value": result.testarrbool[i],\n "valueType": "Constant"\n });\n}\nfor (let i = 0; i <= result.testarrreal.length; i++){\n Test.variables.push({\n "path": Arp.Plc.Eclr/teststruct.testarrreal[${i}],\n "value": result.testarrreal[i],\n "valueType": "Constant"\n });\n}\nfor (let i = 0; i <= result.testarrword.length; i++){\n Test.variables.push({\n "path": Arp.Plc.Eclr/teststruct.testarrword[${i}],\n "value": result.testarrword[i],\n "valueType": "Constant"\n });\n}\nmsg.payload= Test\nreturn msg;\n",
"outputs": 1,
"timeout": 0,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 260,
"y": 260,
"wires": [
[
"ead8e219006a71bb",
"42a2e8fe8de293a0"
]
]
},
{
"id": "f0701750cbc2f454",
"type": "debug",
"z": "b0d5c20d2c81e15a",
"name": "debug 2",
"active": false,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "payload",
"targetType": "msg",
"statusVal": "",
"statusType": "auto",
"x": 540,
"y": 320,
"wires": []
},
{
"id": "42a2e8fe8de293a0",
"type": "debug",
"z": "b0d5c20d2c81e15a",
"name": "debug 3",
"active": false,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "false",
"statusVal": "",
"statusType": "auto",
"x": 440,
"y": 240,
"wires": []
},
{
"id": "6dd09d901334807d",
"type": "comment",
"z": "b0d5c20d2c81e15a",
"name": "WRITE STRUC - To NX102",
"info": "\n",
"x": 820,
"y": 620,
"wires": []
},
{
"id": "85728191a581a00b",
"type": "plc-read-variables",
"z": "b0d5c20d2c81e15a",
"plc_connector": "e6ec980a1af28a84",
"variables": "Arp.Plc.Eclr/teststruct",
"searchbar": "",
"x": 430,
"y": 420,
"wires": [
[
"48ab1a9ec89e0475",
"ce23644cf229cfc5"
]
]
},
{
"id": "48ab1a9ec89e0475",
"type": "debug",
"z": "b0d5c20d2c81e15a",
"name": "debug 4",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "false",
"statusVal": "",
"statusType": "auto",
"x": 620,
"y": 400,
"wires": []
},
{
"id": "928746d33deacd09",
"type": "OpcUa-Client",
"z": "b0d5c20d2c81e15a",
"endpoint": "40fb7f127b35e0f0",
"action": "write",
"deadbandtype": "a",
"deadbandvalue": 1,
"time": 10,
"timeUnit": "s",
"certificate": "n",
"localfile": "",
"localkeyfile": "",
"securitymode": "None",
"securitypolicy": "None",
"useTransport": false,
"maxChunkCount": 1,
"maxMessageSize": 8192,
"receiveBufferSize": 8192,
"sendBufferSize": 8192,
"name": "Omron NX102 Client Write",
"x": 780,
"y": 560,
"wires": [
[
"8a488d631e9bce63"
],
[]
]
},
{
"id": "8a488d631e9bce63",
"type": "debug",
"z": "b0d5c20d2c81e15a",
"name": "debug 5",
"active": false,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "false",
"statusVal": "",
"statusType": "auto",
"x": 1040,
"y": 540,
"wires": []
},
{
"id": "ce23644cf229cfc5",
"type": "function",
"z": "b0d5c20d2c81e15a",
"name": "Map to NX102",
"func": "// @ts-nocheck\n \nresult = msg.payload;\nTest = \n {\n testbool: result.variables[0].value,\n testreal: result.variables[1].value,\n testword: result.variables[2].value,\n testarrbool : [result.variables[3].value,result.variables[4].value,result.variables[5].value,result.variables[6].value,\n result.variables[7].value,result.variables[8].value,result.variables[9].value,result.variables[10].value,result.variables[11].value,result.variables[12].value],\n testarrreal: [result.variables[13].value, result.variables[14].value, result.variables[15].value, result.variables[16].value,\n result.variables[17].value, result.variables[18].value, result.variables[19].value, result.variables[20].value, result.variables[21].value, result.variables[22].value],\n testarrword: [result.variables[23].value, result.variables[24].value, result.variables[25].value, result.variables[26].value,\n result.variables[27].value, result.variables[28].value, result.variables[29].value, result.variables[30].value, result.variables[31].value, result.variables[32].value]\n }\nmsg.payload= Test\nreturn msg;\n",
"outputs": 1,
"timeout": 0,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 520,
"y": 500,
"wires": [
[
"1e9f6f406ec0228b",
"928746d33deacd09"
]
]
},
{
"id": "1e9f6f406ec0228b",
"type": "debug",
"z": "b0d5c20d2c81e15a",
"name": "debug 6",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "false",
"statusVal": "",
"statusType": "auto",
"x": 780,
"y": 480,
"wires": []
},
{
"id": "40fb7f127b35e0f0",
"type": "OpcUa-Endpoint",
"endpoint": "opc.tcp://192.168.78.170:4840",
"secpol": "None",
"secmode": "None",
"none": true,
"login": false,
"usercert": false,
"usercertificate": "",
"userprivatekey": ""
},
{
"id": "e6ec980a1af28a84",
"type": "plc-connector",
"host": "192.168.78.169",
"station_name": "axcf2152-pnc",
"session_timeout": "20000",
"api_version": "v1.4",
"auth_required": "false"
}
]

[mikakaraila]

Hmm, it could be that a value is checked on PLC and it will reject value with statuscode out of range.
String too long or some value is smaller/bigger than it will accept...

[Maxime771]

Here the solution :

Writing extension object work.