File modules/modbusy/request/MultipleHoldingRegistersReader.class.php

Last commit: Thu Dec 26 19:50:18 2024 +0100	Jan Dankert	New: ModbusTCP for later use in the scriptbox.


     1 <?php
     2 namespace modbusy\request;
     3 
     4 
     5 class MultipleHoldingRegistersReader extends  MultibyteRequest
     6 {
     7     public function __construct()
     8     {
     9         parent::__construct();
    10         $this->functionCode = 3;
    11     }
    12 
    13     /**
    14      * @param $startAdress
    15      * @param $byteCount
    16      * @return false|string
    17      */
    18     public function readFrom($startAdress,$byteCount )
    19     {
    20         return parent::request(
    21             pack('n',$startAdress). // 2 bytes: start address
    22             pack("n",ceil((9+$byteCount)/2)) // 2 bytes: number of bytes to read
    23         );
    24     }
    25 }



Download modules/modbusy/request/MultipleHoldingRegistersReader.class.php


History
Thu, 26 Dec 2024 19:50:18 +0100	Jan Dankert	New: ModbusTCP for later use in the scriptbox.