st-ethernet-ip/test.js

A simple node interface for Ethernet/IP.

const {ControllerManager} = require('./dist/index.js');

let cm = new ControllerManager();


//If you want to do something with the value every 1000ms , I would set the rpi to something smaller (500) so your sure to have a new value.
cm.addController('192.168.121.10', 0, 100);
//Always connect controller after adding it
cm.controllers[cm.controllers.length - 1].connect();
//Add Your tags to the controller (Example is DINT Controller scope tag called 'RATE_TEST99' )
cm.controllers[cm.controllers.length - 1].addTag('RATE_TEST99');
//Add Your tags to the controller (Example is REAL Program:MainProgram scope tag called 'TEST_POINT1' )
cm.controllers[cm.controllers.length - 1].addTag('TEST_POINT1', 'MainProgram');
cm.controllers[cm.controllers.length - 1].addTag('testUDT3[0]', 'MainProgram');

// READING TAG VALUE EXAMPLE
//Do something with tag values every 1000ms
setInterval(() => {
  let tagValues = cm.getAllValues();

  // Display all tag names and values at controller '192.168.121.10'
  console.log(tagValues['192.168.121.10']);
  // Display tag named 'RATE_TEST99' value
  console.log(tagValues['192.168.121.10']['RATE_TEST99']);
  // Display tag named 'TEST_POINT1' value
  console.log(tagValues['192.168.121.10']['Program:MainProgram.testUDT3[0]']);

  //Another way to get a current tag value
  console.log(cm.controllers.find(c => c.ipAddress === '192.168.121.10').tags.find(n => n.tagname === 'RATE_TEST99').tag.value);

}, 1000);


//WRITING TAG VALUE EXAMPLE
//Write a incrementing value to a controller tag after 1000ms
setInterval(() => {
  //Increment value and write to DINT controller scope tag 'RATE_TEST99' at controller '192.168.121.10'
  let tag1 = cm.controllers.find(c => c.ipAddress === '192.168.121.10').tags.find(n => n.tagname === 'RATE_TEST99').tag;
  tag1.value = tag1.value + 1;

  //Increment value and write to REAL Program:MainProgram scope tag 'TEST_POINT1' at controller '192.168.121.10' 
  let tag2 = cm.controllers.find(c => c.ipAddress === '192.168.121.10').tags.find(n => (n.tagname === 'testUDT3[0]' && n.program === 'MainProgram')).tag;
  tag2.value.UDT1[0].INT1 = tag2.value.UDT1[0].INT1 - 1000

  //ALWAYS find the tag as shown before doing anything with the tag to insure you are not using a stale tag instance

}, 1000);