node-red-contrib-s7-dynamic v0.2.0

S7 Dynamic Node for Node-RED

This is a dynamic Node-RED node designed for communication with Siemens S7 PLCs using the node-snap7 library. It allows you to read and write data from various addresses (inputs, outputs, memory), dynamically handle connection parameters (IP, rack, slot), and more.

Features

• Dynamic Connection: Supports dynamic connection to Siemens S7 PLCs by specifying IP, rack, and slot.
• Input Reading: Reads inputs based on specified addresses.
• Memory Read/Write: Reads and writes to memory addresses in the PLC.
• Output Writing: Supports writing to outputs by dynamically setting boolean values (true/false or 1/0).
• Custom Address Parsing: Handles custom address formats such as M0.1 for memory addresses.

Requirements

• Node-RED environment.
• Node.js (>= 12.x recommended).
• Siemens S7 PLC or compatible device.
• node-snap7 library.

Installation

To use this node, you must install the Node-RED contribution from the Node-RED palette or manually add it to your package.json:

bash npm install node-red-contrib-s7-dynamic.

Example for Reading Inputs

{
  "payload": {
    "type": "input",
    "ip": "192.168.0.1",
    "rack": 0,
    "slot": 1,
    "addresses": [I1, I2, I3]
  }
}

Example for Writing Outputs

{
  "payload": {
    "type": "output",
    "ip": "192.168.0.1",
    "rack": 0,
    "slot": 1,
    "addresses": {
      "Q0": true,
      "Q1": false
    }
  }
}

Example for Memory Read/Write

{
  "payload": {
    "type": "memory",
    "ip": "192.168.0.1",
    "rack": 0,
    "slot": 1,
    "addresses": ["M0.1", "M10.0"]
  }
}

License

This project is licensed under the MIT License - see the LICENSE file for details.

Contributing

Feel free to fork this repository, contribute to the code, and open pull requests with new features or bug fixes.

Authors

Eberson M. - Creator - EbersonM

Acknowledgements

Thanks to the developers of node-snap7 for the core library to interface with Siemens S7 PLCs. Node-RED community for providing the platform for creating powerful IoT applications.