{"library":"node-red-contrib-s7comm","title":"Node-RED Siemens S7 PLC Communication","description":"node-red-contrib-s7comm is a Node-RED package designed to facilitate communication with Siemens SIMATIC S7-300, S7-1200, and S7-1500 PLCs. It leverages the RFC1006 (ISO-on-TCP) communication protocol, enabling users to read from and write to specific PLC addresses using various S7 data types. The current stable version is 1.1.6. As a Node-RED contribution node, its release cadence is typically driven by community contributions and updates to its underlying `nodeS7` library, which handles the core PLC communication. Key differentiators include its integration into the Node-RED flow-based programming environment, simplifying the creation of HMI, SCADA, or IIoT applications that interact with Siemens PLCs without requiring extensive low-level protocol knowledge. It abstracts the complexities of the S7comm protocol behind user-friendly Node-RED nodes.","language":"javascript","status":"active","last_verified":"Sun Apr 19","install":{"commands":["npm install node-red-contrib-s7comm"],"cli":null},"imports":["/* This package is a Node-RED node. Users do not typically import symbols directly into JavaScript. */","/* This package is a Node-RED node. Users do not typically import symbols directly into JavaScript. */","/* This package is a Node-RED node. Users do not typically import symbols directly into JavaScript. */"],"auth":{"required":false,"env_vars":[]},"quickstart":{"code":"// To install the Node-RED node:\n// 1. Ensure Node-RED is installed and running.\n// 2. Open the Node-RED editor (usually http://localhost:1880).\n// 3. Go to the Palette Manager (top-right menu -> Manage palette).\n// 4. In the 'Install' tab, search for 'node-red-contrib-s7comm' and click install.\n\n// After installation, drag 's7comm read' and 's7comm write' nodes from the palette onto your flow.\n// Example JavaScript code showing conceptual S7 client usage, not direct 'node-red-contrib-s7comm' usage:\n\n// import { S7Client } from 'nodeS7'; // Hypothetical import if using nodeS7 directly\n\n// async function readS7Data() {\n//   const client = new S7Client();\n//   try {\n//     await client.connect({\n//       host: '192.168.0.1',\n//       port: 102,\n//       rack: 0,\n//       slot: 1\n//     });\n//     console.log('Connected to PLC.');\n\n//     const data = await client.readArea(\n//       S7Client.S7Area.DB,\n//       1, // DB number\n//       0, // Start offset\n//       2, // Length (e.g., 2 bytes)\n//       S7Client.S7Type.WORD\n//     );\n//     console.log('Read data:', data);\n//   } catch (error) {\n//     console.error('S7 communication error:', error);\n//   } finally {\n//     client.destroy();\n//   }\n// }\n\n// readS7Data();","lang":"javascript","description":"Illustrates the typical installation process for Node-RED packages via the Palette Manager and provides a conceptual JavaScript snippet for direct S7 client interaction (not directly from this Node-RED node).","tag":null,"tag_description":null,"last_tested":null,"results":[]},"compatibility":null}