turck 100000897, Instructions For Use Manual

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Commissioning
Programming digital channels (DXP)
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7.6.4 Programming DXP channels with Node.js
NOTE
The speed of the data transmission depends on the configured block size and the
set transfer rate. The speed may possibly not be enough for time critical
applications. To achieve faster data processing, the process can be set as a real-time
process.
The following examples illustrate the programming of the digital I/O channels with Node.js.
Further information on Node.js and the Node.js packages is provided at:
n
https://nodejs.org
n
https://www.npmjs.com/
// initialize the onoff box
const Gpio = require('onoff').Gpio;
function setGpioByInt(OUT, val) {
// switch from DXP to GPIO...
switch (OUT) {
case 0:
res = 88;
break;
case 1:
res = 89;
break;
case 2:
res = 86;
break;
case 3:
res = 87;
break;
}
// initialize the GPIO just to write...
// write the GPIO / DXP...
console.log('set Gpio '+ res + ' to ' + val);
}