Hello,
I'm trying to let a Client node write a value to a variable of the address space in my OPC UA server.
As long as the variable in the Server is specified as Integer, Double, etc. everything works fine. I can write and read the variable with a Client without any problems.
However, if I specify the variable as string, the following happens:
- Reading the initialized value - OK
- Writing new value - two messages from Client node:
"Counter: Second set value by Input b"
"Counter: Payload value, setting value to [{"_msgid":"1","payload":"2","topic":"3","datatype":"4","browseName":"5"},"385fde3613f0f306","b","ns=1;s=count","String","Counter"]"
with "b" from the first statement being the value I wanted to write
- Trying to read the value again - message from Client node
"Client node error on: error: [" error at active reading: serviceResult = BadInternalError (0x80020000)"]"
My flow:
[
{
"id": "056d99c0561209fd",
"type": "OpcUa-Client",
"z": "4571363c02da6541",
"endpoint": "d6af2ba71bd244b8",
"action": "read",
"deadbandtype": "a",
"deadbandvalue": 1,
"time": "1",
"timeUnit": "s",
"certificate": "n",
"localfile": "",
"localkeyfile": "",
"securitymode": "None",
"securitypolicy": "None",
"folderName4PKI": "",
"name": "",
"x": 840,
"y": 600,
"wires": [
[
"e80207e73aea2dd9"
]
]
},
{
"id": "e568aa60eb783cc1",
"type": "OpcUa-Item",
"z": "4571363c02da6541",
"item": "ns=1;s=count",
"datatype": "String",
"value": "",
"name": "Counter",
"x": 620,
"y": 600,
"wires": [
[
"056d99c0561209fd"
]
],
"icon": "node-red-contrib-opcua-server/icon.png"
},
{
"id": "cdba768a51f2843e",
"type": "inject",
"z": "4571363c02da6541",
"name": "Add item",
"props": [
{
"p": "payload"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"payload": "",
"payloadType": "str",
"x": 440,
"y": 600,
"wires": [
[
"e568aa60eb783cc1"
]
]
},
{
"id": "e80207e73aea2dd9",
"type": "debug",
"z": "4571363c02da6541",
"name": "",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "payload",
"targetType": "msg",
"statusVal": "",
"statusType": "auto",
"x": 1050,
"y": 600,
"wires": []
},
{
"id": "ca3305551b7a3a9b",
"type": "OpcUa-Item",
"z": "4571363c02da6541",
"item": "ns=1;s=count",
"datatype": "String",
"value": "",
"name": "Counter",
"x": 640,
"y": 500,
"wires": [
[
"a85637302bde4a56"
]
],
"icon": "node-red-contrib-opcua-server/icon.png"
},
{
"id": "a85637302bde4a56",
"type": "OpcUa-Client",
"z": "4571363c02da6541",
"endpoint": "d6af2ba71bd244b8",
"action": "write",
"deadbandtype": "a",
"deadbandvalue": 1,
"time": 10,
"timeUnit": "s",
"certificate": "n",
"localfile": "",
"localkeyfile": "",
"securitymode": "None",
"securitypolicy": "None",
"folderName4PKI": "",
"name": "",
"x": 860,
"y": 500,
"wires": [
[
"7bc9af43b5d78cc1"
]
]
},
{
"id": "e4253eb280cffc69",
"type": "inject",
"z": "4571363c02da6541",
"name": "Add item",
"props": [
{
"p": "payload"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"payload": "b",
"payloadType": "str",
"x": 440,
"y": 500,
"wires": [
[
"ca3305551b7a3a9b"
]
]
},
{
"id": "7bc9af43b5d78cc1",
"type": "debug",
"z": "4571363c02da6541",
"name": "",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "true",
"targetType": "full",
"statusVal": "",
"statusType": "auto",
"x": 1050,
"y": 500,
"wires": []
},
{
"id": "7bcb25894b455949",
"type": "opcua-compact-server",
"z": "4571363c02da6541",
"port": "4840",
"endpoint": "",
"productUri": "",
"acceptExternalCommands": true,
"maxAllowedSessionNumber": 10,
"maxConnectionsPerEndpoint": 10,
"maxAllowedSubscriptionNumber": 100,
"alternateHostname": "",
"name": "",
"showStatusActivities": false,
"showErrors": false,
"allowAnonymous": true,
"individualCerts": false,
"isAuditing": false,
"serverDiscovery": true,
"users": [],
"xmlsetsOPCUA": [],
"publicCertificateFile": "",
"privateCertificateFile": "",
"registerServerMethod": 1,
"discoveryServerEndpointUrl": "",
"capabilitiesForMDNS": "",
"maxNodesPerRead": 1000,
"maxNodesPerWrite": 1000,
"maxNodesPerHistoryReadData": 100,
"maxNodesPerBrowse": 3000,
"maxBrowseContinuationPoints": 10,
"maxHistoryContinuationPoints": 10,
"delayToInit": 1000,
"delayToClose": 200,
"serverShutdownTimeout": 100,
"addressSpaceScript": "function constructAlarmAddressSpace(server, addressSpace, eventObjects, done) {\n\n const opcua = coreServer.choreCompact.opcua;\n const LocalizedText = opcua.LocalizedText;\n const namespace = addressSpace.getOwnNamespace();\n \n const Variant = opcua.Variant;\n const DataType = opcua.DataType;\n const DataValue = opcua.DataValue;\n \n let count=\"a\";\n \n coreServer.debugLog(\"init dynamic address space\");\n const rootFolder = addressSpace.findNode(\"RootFolder\");\n \n node.warn(\"construct new address space for OPC UA\");\n \n const HBFG = namespace.addFolder(rootFolder.objects, {\n \"browseName\":\"HBFG\"\n });\n \n const Tanks = namespace.addFolder(HBFG,{ \"browseName\":\"Tanks\" });\n \n \nnamespace.addVariable({\n \"componentof\": Tanks,\n \"nodeId\": \"ns=1;s=count\",\n \"browseName\":\"Counter\",\n \"dataType\": \"String\",\n \"value\": {\n \"get\": function() {\n return new Variant({\n \"dataType\": DataType.String,\n \"value\": count\n });\n },\n \"set\": function(variant) {\n count=parseFloat(variant.value);\n return opcua.StatusCodes.Good;\n }\n }\n });\n \n\n coreServer.debugLog(\"create dynamic address space done\");\n node.warn(\"construction of new address space for OPC UA done\");\n \n done();\n}\n",
"x": 660,
"y": 380,
"wires": []
},
{
"id": "d6af2ba71bd244b8",
"type": "OpcUa-Endpoint",
"endpoint": "opc.tcp://localhost:4840",
"secpol": "None",
"secmode": "None",
"none": false,
"login": false,
"usercert": false,
"usercertificate": "",
"userprivatekey": ""
}
]
Does anybody know what I'm doing wrong? I'm relatively new to OPC UA and would appreciate the help. Thank you!
--edit: forgot to remove the "parsefloat()" in the set command. I can read the variable now. The issue with the writing client is still there though
