TwinCAT ADS client for Node-RED (unofficial). Basically a Node-RED wrapper on battle-tested ads-client Node.js library.
The ads-client
library used under the hood is battle-tested and reliable.
Not all features are yet in this Node-RED port version work is in progress.
Target is to have all same features as the ads-client has.
cd ~/.node-red
npm i node-red-contrib-ads-client
Please make sure you also read ads-client README as it has lots of valuable information.
Please see help of the each node in Node-RED help window for instructions and more info.
The following nodes are available at this point:
Node | Description | Equivalent in ads-client | More info |
---|---|---|---|
ADS - Connection Status | Reports status changes of the selected ADS connection. | connect , disconnect and reconnect events |
|
ADS - Read Symbol | Reads any kind of variable by given variable name. | readSymbol() |
README |
ADS - Write Symbol | Writes given value to any kind of variable by given variable name. | writeSymbol() |
README |
ADS - Subscribe | Subscribes to given variable to receive notifications. | subscribe() |
README |
ADS - Invoke RPC Method | Calls a function block method with parameters using RPC (remote procedure call). | invokeRpcMethod() |
README |
ADS - Read Runtime State | Reads TwinCAT PLC runtime state (run, stop) from given ADS port. | readPlcRuntimeState() |
README |
ADS - Read System Manager State | Reads TwinCAT System Manager state from target (using ADS port 10000). | readSystemManagerState() |
README |
ADS - Get Symbol Info | Returns symbol information for given variable/symbol. | getSymbolInfo() |
README |
ADS - Read Raw | Reads (raw byte) data from PLC by given index group, index offset and size. | readRaw() |
README |
ADS - Write Raw | Writes (raw byte) buffer data to PLC by given index group and index offset. | writeRaw() |
README |
ADS - Convert To Raw | Converts given Javascript object/variable to raw Buffer data by given data type (like REAL, ST_Struct). | convertToRaw() |
README |
ADS - Convert From Raw | Converts given raw data (byte Buffer) to Javascript object by given data type (like REAL, ST_Struct). | convertFromRaw() |
README |
After you have installed the package and restarted Node-RED, you should see the available ADS nodes in your nodes list.
You need to create a configuration (ads-client instance) to every target PLC you will use. To do this, you need to add one node to the flow first.
In this example we have GVL_Test.MyStringVariable
in the PLC.
ADS - Read Symbol
node to the flowAdd new ads-client-connection...
, -> click the edit icon next to it.Target AmsNetId
- Target PLC AmsNetId (like localhost
, 192.168.1.5.1.1
and so on)Target ADS port
- Target runtime ADS port (like 851
for TwinCAT 3 runtime 1)GVL_Test.MyStringVariable
inject
node to the flowdebug
node to the flowNow pressing the button in inject node will command the Read Symbol node to read value from PLC. The value (or error) will be shown in debug window.
Example to import
[{"id":"290b97f1.b47728","type":"tab","label":"Flow 1","disabled":false,"info":""},{"id":"3f5e8355.09cafc","type":"ads-client-read-symbol","z":"290b97f1.b47728","name":"","connection":"bbd41d0d.87aac","variableName":"GVL_Test.MyStringVariable","x":230,"y":120,"wires":[["48a7c812.ab1db8"]]},{"id":"8b366e5a.37926","type":"inject","z":"290b97f1.b47728","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":130,"y":40,"wires":[["3f5e8355.09cafc"]]},{"id":"48a7c812.ab1db8","type":"debug","z":"290b97f1.b47728","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":200,"y":220,"wires":[]},{"id":"bbd41d0d.87aac","type":"ads-client-connection","name":"Local PLC","targetAmsNetId":"localhost","targetAdsPort":"851","objectifyEnumerations":true,"convertDatesToJavascript":true,"readAndCacheSymbols":false,"readAndCacheDataTypes":false,"disableSymbolVersionMonitoring":false,"routerTcpPort":"","routerAddress":"","localAddress":"","localTcpPort":"","localAmsNetId":"","localAdsPort":"","timeoutDelay":"","hideConsoleWarnings":false,"autoReconnect":true,"reconnectInterval":"","checkStateInterval":"","connectionDownDelay":"","allowHalfOpen":false,"disableBigInt":false}]
I'm having connection problems
How to get debugging information?
Debugging level
of ADS connection to 3 under connection settings.Licensed under MIT License so commercial use is possible. Please respect the license, linking to this page is also much appreciated.
Copyright (c) Jussi Isotalo <j.isotalo91@gmail.com>
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