modbus-connect/function-codes/SGM130/set-controller-time.js

Modbus RTU over Web Serial and Node.js SerialPort

// function-codes/SGM130/set-controller-time.js

const { FUNCTION_CODES } = require('../../constants/constants.js');
const toBytesLE = require('../../utils/utils.js');

const SET_CONTROLLER_TIME = FUNCTION_CODES.SET_CONTROLLER_TIME;

/**
 * Формирует PDU-запрос для установки текущего времени на контроллере.
 * @param {{
 *   seconds: number,
 *   minutes: number,
 *   hours: number,
 *   day: number,
 *   month: number,
 *   year: number
 * }} time
 * @returns {Uint8Array}
 */
function buildSetControllerTimeRequest(time) {
    const {
        seconds,
        minutes,
        hours,
        day,
        month,
        year
    } = time;

    const [yearLow, yearHigh] = toBytesLE(year, 2);

    return new Uint8Array([
        SET_CONTROLLER_TIME,
        0x00, // резерв
        0x00, // резерв
        seconds,
        minutes,
        hours,
        day,
        month,
        yearLow,
        yearHigh
    ]);
}

/**
 * Разбирает PDU-ответ от контроллера после установки времени.
 * @param {Uint8Array} pdu
 * @returns {boolean}
 */
function parseSetControllerTimeResponse(pdu) {
    if (!pdu || pdu.length < 1 || pdu[0] !== SET_CONTROLLER_TIME) {
        throw new Error('Invalid response for Set Controller Time');
    }
    return true;
}

module.exports = {
    buildSetControllerTimeRequest,
    parseSetControllerTimeResponse
}