hi, i'm trying to use opcxml supflow (opcxml subflow (flow) - Node-RED) and have some problems to read the variables of a SIMOTION D445_2 (Siemens). With an external Client there are no Problems to get the Values. But specialy this subflow I don't know how the syntax is (ItemName/ItemPath), where do I put in strings? does someone worked with it and can help me out?
regards
Neligan
Hi,
did you have a look at the help sidebar of the subflow node? There you will find some hints to get started. Its not much of documentation, and the formatting seems slightly corrupted, but it is definitely possible to decode the syntax.
As a jump start, feed the node with
{
"payload":{"ItemList":[{"ItemName":"Dynamic.Analog Types.Fools.Rosencrantz"}]},
"url":"http://info.advosol.com/XMLDADemo/XML_Sim/OpcXmlDaServer.asmx",
"action":"Read"
}
Hi,
yes I red the help. But it isn't the same syntax I used to do. see the pictures below.
ItemProperties shows the connection via extern OPCxml-client (there i see the Server is working and i can Brows through the variables.
I tried every way but neer seen a Value on payload.
The idea is to use the subflow as a node, configure it and feed with suitable msg.payload. You shouldn’t have to get inside the subflow. Anyhow I can put together a demo flow next time I’m by the computer.
Is that dOPC explorer from Kassl?
Try this Example and see if it works out for you
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Each action has different payload structure. \n - Read\n ```\n{\n \"ItemPath\": <string>, optional\n \"ItemList\": [\n {\n \"ClientItemHandle\": <string>, optioanl\n \"ItemName\": <string> required\n },\n ...\n]}\n```\n - Write\n ```\n{\n \"ItemPath\": <string>,\n \"ItemList\": [\n {\n \"ClientItemHandle\": <string>, optional\n \"ItemName\": <string>, required\n \"Value\": <>, required\n \"Type\": <string> required as retrieved from GetProperties action \n },\n ...\n]}\n```\n - Subscribe\n ```\n{\n \"SubscriptionPingRate\": <number>, optional defaults to 60000 ms \n \"requestedSamplingRate\": <number>, optional defaults to 1000 ms \n \"ClientRequestHandle\": <string>, optional\n \"ItemPath\": <string>,\n \"ItemList\": [\n {\n \"ClientItemHandle\": <string>, optional \"ItemName\": <string> required\n },\n ...\n]}\n```\n - SubscriptionPolledRefresh ```payload = {'ServerSubHandle': <string>}```\n - SubscriptionCancel ```payload = {'ServerSubHandle': <string>}```\n - Browse ```payload = {'ItemName': <string>}``` \n - GetProperties ```payload = {'ItemName': <string>}``` \n\n4. options \n''options.raw = true'' to skip parsing of XML result \n---\n\n### Example \nBrowse Advosol public server \n``` \nmsg.url = 'http://info.advosol.com/XMLDADemo/XML_Sim/OpcXmlDaServer.asmx' \nmsg.action = 'Browse'\nmsg.payload = {\"ItemName\": \"\"}\n```\n\n### Details\nUse this flow at your own risk. This \"client\" is not certified, nor based on any documentation. 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\nxmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">\n<soap:Body>\n<SubscriptionPolledRefresh xmlns=\"http://opcfoundation.org/webservices/XMLDA/1.0/\" \n ReturnAllItems=\"true\"> \n\t<Options ReturnErrorText=\"true\" ReturnItemTime=\"true\" ReturnItemName=\"true\" LocaleID=\"en\" /> \n\t<ServerSubHandles>{{{payload.ServerSubHandle}}}</ServerSubHandles>\n</SubscriptionPolledRefresh> \n</soap:Body>\n</soap:Envelope>\n","output":"str","x":640,"y":220,"wires":[["8daff6d4.368e78"]]},{"id":"9ffb90ef.88ccd","type":"template","z":"a0568e71.72952","name":"SubscriptionCancel","field":"payload","fieldType":"msg","format":"handlebars","syntax":"mustache","template":"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<soap:Envelope \nxmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\" \nxmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" \nxmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">\n<soap:Body>\n<SubscriptionCancel xmlns=\"http://opcfoundation.org/webservices/XMLDA/1.0/\"\n\tServerSubHandle=\"{{{payload.ServerSubHandle}}}\"/> \n</soap:Body>\n</soap:Envelope>\n","output":"str","x":610,"y":260,"wires":[["8daff6d4.368e78"]]},{"id":"29092e47.e835a2","type":"template","z":"a0568e71.72952","name":"Write","field":"payload","fieldType":"msg","format":"handlebars","syntax":"mustache","template":"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<soap:Envelope \nxmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\" \nxmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" \nxmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">\n<soap:Body>\n <Write xmlns=\"http://opcfoundation.org/webservices/XMLDA/1.0/\" ReturnValuesOnReply=\"true\">\n <Options\n ReturnErrorText=\"true\"\n ReturnItemTime=\"true\"\n ReturnItemName=\"true\"\n ReturnItemPath=\"true\"\n LocaleID=\"en\" \n />\n <ItemList{{#payload.ItemPath}} ItemPath=\"{{{payload.ItemPath}}}\"{{/payload.ItemPath}}>\n {{#payload.ItemList}}\n <Items ItemName=\"{{{ItemName}}}\"{{#ItemPath}} ItemPath=\"{{{ItemPath}}}\"{{/ItemPath}}{{#ClientItemHandle}} ClientItemHandle=\"{{{ClientItemHandle}}}\"{{/ClientItemHandle}}>\n <Value xsi:type=\"{{type}}\">{{value}}</Value>\n </Items>\n {{/payload.ItemList}}\n </ItemList>\n </Write>\t \n</soap:Body>\n</soap:Envelope>\n","output":"str","x":570,"y":140,"wires":[["8daff6d4.368e78"]]},{"id":"700dcd8e.8e42d4","type":"change","z":"a0568e71.72952","name":"header","rules":[{"t":"set","p":"headers","pt":"msg","to":"{\t \"SOAPAction\":\"http://opcfoundation.org/webservices/XMLDA/1.0/\" & action,\t 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function($v,$i,$a) {\"xsi:type\" in $keys($v.\"$\") ? false: true})\t], \",\")};\t{\t\"StatusInfo\": $clean(payload.StatusInfo),\t\"VendorInfo\": $clean(payload.VendorInfo),\t\"SupportedLocaleIDs\": $clean(payload.SupportedLocaleIDs),\t\"SupportedInterfaceVersions\": $clean(payload.SupportedInterfaceVersions),\t\"StartTime\":payload.StartTime,\t\"ProductVersion\":payload.ProductVersion,\t\"ServerState\":payload.ServerState\t}\t\t)","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":540,"y":780,"wires":[["f713686b.a04448"]]},{"id":"f6f2187d.f17ca8","type":"tab","label":"Flow 1","disabled":false,"info":""},{"id":"9c2ef35c871b8ab3","type":"subflow:a0568e71.72952","z":"f6f2187d.f17ca8","name":"","env":[{"name":"action","value":"","type":"str"},{"name":"url","value":"http://info.advosol.com/XMLDADemo/TS_Sim/OpcDAGateway.asmx","type":"str"}],"x":320,"y":100,"wires":[["870388de85df3e0c"]]},{"id":"b9ae6a62d4a32958","type":"inject","z":"f6f2187d.f17ca8","name":"Read","props":[{"p":"payload"},{"p":"action","v":"Read","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"{\"ItemList\":[{\"ItemName\":\"Dynamic.Analog Types.Fools.Rosencrantz\"},{\"ItemName\":\"Dynamic.Analog Types.Fools.Guildenstern\"}]}","payloadType":"json","x":150,"y":160,"wires":[["9c2ef35c871b8ab3"]]},{"id":"870388de85df3e0c","type":"debug","z":"f6f2187d.f17ca8","name":"debug 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From my experience the use of ItemPath sometimes behaves a bit unexpected, depending on server implementation. But from what I can tell from your screenshots i think you manage without it. Just modify url and ItemName and give it a try
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