1. Introduction This article mainly introduces how Node-Red uses the plug-in node-red-contrib-opc-da and the plug-in node-red-contrib-opcda-client to communicate with the OPC DA server, and uses KEPServer to simulate the server. Environment setup This environment setup requires two machines, in the same LAN: Server Function: Simulate OPC DA server Operating system: Windows 7 Professional Client computer […]
Tag: node-red
How to use Node-Red as ModbusTCP slave
1. Content Introduction This article mainly introduces how to use Modbus-Server and Modbus-Flex-Server nodes to deploy ModbusTCP servers, and write data in a certain format through the buffer-maker node, such as float, double, etc., and then use Modbus Poll software to test the writing Whether the entered data is correct. buffer-maker is a node of […]
Node-Red communicates with ModbusTCP device – writes data
1. Introduction This article mainly introduces Node-Red to write data to ModbusTCP devices through the node-red-contrib-modbus plug-in, and uses the Modbus Slave tool to simulate the slave device. Node-Red serves as the master station and starts from address 0 to the coil and slave device. Writing one or more data to the holding register is […]
Using vue and plus in node-red
Embed vue framework and plus component library in the node-red node edit box Screenshot of effect Reference steps Register node demo: index.js index.html Expose resources server.js Introduce resources index.html Register vue and plus index.html edit.js Write your editor index.html edit.js edit.css Export component package.json Directory structure Main code package.json { “name”: “node-red-demo”, “version”: “1.0.0”, “description”: […]
Node-Red communicates with ModbusTCP device – reading data
1. Introduction This article mainly introduces how Node-Red communicates with ModbusTCP devices through the node-red-contrib-modbus plug-in. Here, the Modbus Slave tool is used to simulate the slave device. Node-Red serves as the master station and reads 10 coils starting from address 0. The status and 10 holding registers are implemented in different ways using three […]
node-red – read and write operations redis
node-red – read and write operations redis 1. Preparation 2. node-red installs redis node 3. Node-red operation uses redis node 3.1 Store data in redis 3.1.1 redis-out node – stored as a linked list 3.1.2 redis-cmd node – stored as HSET (key-value) 3.2 Query redis data 3.1 redis-in node – real-time monitoring appendix Appendix 1: […]
centos installs node-red through source files
centos installs node-red through source files 1. Download the source file 1.1 View system information 1.2 download 2. Installation and configuration 2.1 install nodejs 2.2 Install node-red 3. PM2 manages the node-red process 3.1 pm2 3.2 node-red set boot self-start 3.3 pm2 common commands Four, more [back to list] 1. Download the source file 1.1 […]
Node-red environment construction: one machine with multiple instances
node-red environment construction: one machine with multiple instances 1. Installation and use of nodered basic environment Two, window multi-instance start node-red 2.1 Early preparations 2.2 Create an instance with port 1880 2.2.1 Install node-red dependencies 2.2.2 Modify the configuration file settings 2.2.3 Running the example test 2.3 Create an instance with port 1881 2.3.1 Install […]
Node-RED collects modbus data
Node-RED and Modbus The sun is good today Published at 2021-11-15 11:22:375033 Favorite 28 Category column: Node-RED Article label: front end copyright ?Edit the Node-RED column to include this content 4 articles 2 subscriptions subscribe column Author: Dried plum vegetable sesame seed cake without meat Modbus Modbus is a serial communication protocol published by Modicon […]