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1012 lines
29 KiB
1012 lines
29 KiB
<?php
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/**
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* Phpmodbus Copyright (c) 2004, 2012 Jan Krakora
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*
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* This source file is subject to the "PhpModbus license" that is bundled
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* with this package in the file license.txt.
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*
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*
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* @copyright Copyright (c) 2004, 2012 Jan Krakora
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* @license PhpModbus license
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* @category Phpmodbus
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* @tutorial Phpmodbus.pkg
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* @package Phpmodbus
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* @version $id$
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*
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*/
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require_once dirname(__FILE__) . '/IecType.php';
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require_once dirname(__FILE__) . '/PhpType.php';
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/**
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* ModbusMaster
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*
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* This class deals with the MODBUS master
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*
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* Implemented MODBUS master functions:
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* - FC 1: read coils
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* - FC 2: read input discretes
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* - FC 3: read multiple registers
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* - FC 6: write single register
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* - FC 15: write multiple coils
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* - FC 16: write multiple registers
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* - FC 23: read write registers
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*
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* @author Jan Krakora
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* @copyright Copyright (c) 2004, 2012 Jan Krakora
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* @package Phpmodbus
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*
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*/
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class ModbusMaster {
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private $sock;
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public $host = "192.168.1.1";
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public $port = "502";
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public $client = "";
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public $client_port = "502";
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public $status;
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public $timeout_sec = 5; // Timeout 5 sec
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public $endianness = 0; // Endianness codding (little endian == 0, big endian == 1)
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public $socket_protocol = "UDP"; // Socket protocol (TCP, UDP)
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/**
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* ModbusMaster
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*
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* This is the constructor that defines {@link $host} IP address of the object.
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*
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* @param String $host An IP address of a Modbus TCP device. E.g. "192.168.1.1"
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* @param String $protocol Socket protocol (TCP, UDP)
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*/
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function ModbusMaster($host, $protocol){
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$this->socket_protocol = $protocol;
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$this->host = $host;
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}
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/**
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* __toString
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*
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* Magic method
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*/
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function __toString() {
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return "<pre>" . $this->status . "</pre>";
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}
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/**
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* connect
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*
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* Connect the socket
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*
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* @return bool
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*/
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private function connect(){
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// Create a protocol specific socket
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if ($this->socket_protocol == "TCP"){
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// TCP socket
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$this->sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
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} elseif ($this->socket_protocol == "UDP"){
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// UDP socket
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$this->sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
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} else {
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throw new Exception("Unknown socket protocol, should be 'TCP' or 'UDP'");
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}
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// Bind the client socket to a specific local port
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if (strlen($this->client)>0){
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$result = socket_bind($this->sock, $this->client, $this->client_port);
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if ($result === false) {
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throw new Exception("socket_bind() failed.</br>Reason: ($result)".
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socket_strerror(socket_last_error($this->sock)));
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} else {
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$this->status .= "Bound\n";
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}
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}
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// Connect the socket
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$result = @socket_connect($this->sock, $this->host, $this->port);
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if ($result === false) {
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throw new Exception("socket_connect() failed.</br>Reason: ($result)".
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socket_strerror(socket_last_error($this->sock)));
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} else {
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$this->status .= "Connected\n";
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return true;
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}
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}
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/**
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* disconnect
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*
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* Disconnect the socket
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*/
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private function disconnect(){
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socket_close($this->sock);
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$this->status .= "Disconnected\n";
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}
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/**
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* send
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*
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* Send the packet via Modbus
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*
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* @param string $packet
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*/
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private function send($packet){
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socket_write($this->sock, $packet, strlen($packet));
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$this->status .= "Send\n";
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}
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/**
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* rec
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*
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* Receive data from the socket
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*
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* @return bool
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*/
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private function rec(){
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socket_set_nonblock($this->sock);
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$readsocks[] = $this->sock;
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$writesocks = NULL;
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$exceptsocks = NULL;
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$rec = "";
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$lastAccess = time();
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while (socket_select($readsocks,
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$writesocks,
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$exceptsocks,
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0,
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300000) !== FALSE) {
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$this->status .= "Wait data ... \n";
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if (in_array($this->sock, $readsocks)) {
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while (@socket_recv($this->sock, $rec, 2000, 0)) {
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$this->status .= "Data received\n";
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return $rec;
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}
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$lastAccess = time();
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} else {
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if (time()-$lastAccess >= $this->timeout_sec) {
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throw new Exception( "Watchdog time expired [ " .
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$this->timeout_sec . " sec]!!! Connection to " .
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$this->host . " is not established.");
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}
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}
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$readsocks[] = $this->sock;
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}
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}
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/**
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* responseCode
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*
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* Check the Modbus response code
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*
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* @param string $packet
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* @return bool
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*/
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private function responseCode($packet){
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if((ord($packet[7]) & 0x80) > 0) {
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// failure code
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$failure_code = ord($packet[8]);
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// failure code strings
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$failures = array(
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0x01 => "ILLEGAL FUNCTION",
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0x02 => "ILLEGAL DATA ADDRESS",
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0x03 => "ILLEGAL DATA VALUE",
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0x04 => "SLAVE DEVICE FAILURE",
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0x05 => "ACKNOWLEDGE",
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0x06 => "SLAVE DEVICE BUSY",
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0x08 => "MEMORY PARITY ERROR",
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0x0A => "GATEWAY PATH UNAVAILABLE",
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0x0B => "GATEWAY TARGET DEVICE FAILED TO RESPOND");
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// get failure string
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if(key_exists($failure_code, $failures)) {
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$failure_str = $failures[$failure_code];
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} else {
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$failure_str = "UNDEFINED FAILURE CODE";
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}
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// exception response
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throw new Exception("Modbus response error code: $failure_code ($failure_str)");
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} else {
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$this->status .= "Modbus response error code: NOERROR\n";
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return true;
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}
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}
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/**
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* readCoils
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*
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* Modbus function FC 1(0x01) - Read Coils
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*
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* Reads {@link $quantity} of Coils (boolean) from reference
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* {@link $reference} of a memory of a Modbus device given by
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* {@link $unitId}.
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*
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* @param type $unitId
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* @param type $reference
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* @param type $quantity
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*/
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function readCoils($unitId, $reference, $quantity){
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$this->status .= "readCoils: START\n";
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// connect
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$this->connect();
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// send FC 1
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$packet = $this->readCoilsPacketBuilder($unitId, $reference, $quantity);
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$this->status .= $this->printPacket($packet);
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$this->send($packet);
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// receive response
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$rpacket = $this->rec();
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$this->status .= $this->printPacket($rpacket);
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// parse packet
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$receivedData = $this->readCoilsParser($rpacket, $quantity);
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// disconnect
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$this->disconnect();
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$this->status .= "readCoils: DONE\n";
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// return
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return $receivedData;
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}
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/**
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* fc1
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*
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* Alias to {@link readCoils} method
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*
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* @param type $unitId
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* @param type $reference
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* @param type $quantity
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* @return type
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*/
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function fc1($unitId, $reference, $quantity){
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return $this->readCoils($unitId, $reference, $quantity);
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}
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/**
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* readCoilsPacketBuilder
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*
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* FC1 packet builder - read coils
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*
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* @param type $unitId
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* @param type $reference
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* @param type $quantity
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* @return type
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*/
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private function readCoilsPacketBuilder($unitId, $reference, $quantity){
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$dataLen = 0;
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// build data section
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$buffer1 = "";
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// build body
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$buffer2 = "";
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$buffer2 .= iecType::iecBYTE(1); // FC 1 = 1(0x01)
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// build body - read section
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$buffer2 .= iecType::iecINT($reference); // refnumber = 12288
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$buffer2 .= iecType::iecINT($quantity); // quantity
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$dataLen += 5;
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// build header
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$buffer3 = '';
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$buffer3 .= iecType::iecINT(rand(0,65000)); // transaction ID
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$buffer3 .= iecType::iecINT(0); // protocol ID
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$buffer3 .= iecType::iecINT($dataLen + 1); // lenght
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$buffer3 .= iecType::iecBYTE($unitId); //unit ID
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// return packet string
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return $buffer3. $buffer2. $buffer1;
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}
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/**
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* readCoilsParser
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*
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* FC 1 response parser
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*
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* @param type $packet
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* @param type $quantity
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* @return type
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*/
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private function readCoilsParser($packet, $quantity){
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$data = array();
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// check Response code
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$this->responseCode($packet);
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// get data from stream
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for($i=0;$i<ord($packet[8]);$i++){
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$data[$i] = ord($packet[9+$i]);
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}
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// get bool values to array
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$data_bolean_array = array();
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$di = 0;
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foreach($data as $value){
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for($i=0;$i<8;$i++){
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if($di == $quantity) continue;
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// get boolean value
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$v = ($value >> $i) & 0x01;
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// build boolean array
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if($v == 0){
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$data_bolean_array[] = FALSE;
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} else {
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$data_bolean_array[] = TRUE;
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}
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$di++;
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}
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}
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return $data_bolean_array;
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}
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/**
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* readInputDiscretes
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*
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* Modbus function FC 2(0x02) - Read Input Discretes
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*
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* Reads {@link $quantity} of Inputs (boolean) from reference
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* {@link $reference} of a memory of a Modbus device given by
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* {@link $unitId}.
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*
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* @param type $unitId
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* @param type $reference
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* @param type $quantity
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*/
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function readInputDiscretes($unitId, $reference, $quantity){
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$this->status .= "readInputDiscretes: START\n";
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// connect
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$this->connect();
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// send FC 2
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$packet = $this->readInputDiscretesPacketBuilder($unitId, $reference, $quantity);
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$this->status .= $this->printPacket($packet);
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$this->send($packet);
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// receive response
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$rpacket = $this->rec();
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$this->status .= $this->printPacket($rpacket);
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// parse packet
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$receivedData = $this->readInputDiscretesParser($rpacket, $quantity);
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// disconnect
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$this->disconnect();
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$this->status .= "readInputDiscretes: DONE\n";
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// return
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return $receivedData;
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}
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/**
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* fc2
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*
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* Alias to {@link readInputDiscretes} method
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*
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* @param type $unitId
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* @param type $reference
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* @param type $quantity
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* @return type
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*/
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function fc2($unitId, $reference, $quantity){
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return $this->readInputDiscretes($unitId, $reference, $quantity);
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}
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/**
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* readInputDiscretesPacketBuilder
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*
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* FC2 packet builder - read coils
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*
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* @param type $unitId
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* @param type $reference
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* @param type $quantity
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* @return type
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*/
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private function readInputDiscretesPacketBuilder($unitId, $reference, $quantity){
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$dataLen = 0;
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// build data section
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$buffer1 = "";
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// build body
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$buffer2 = "";
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$buffer2 .= iecType::iecBYTE(2); // FC 2 = 2(0x02)
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// build body - read section
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$buffer2 .= iecType::iecINT($reference); // refnumber = 12288
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$buffer2 .= iecType::iecINT($quantity); // quantity
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$dataLen += 5;
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// build header
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$buffer3 = '';
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$buffer3 .= iecType::iecINT(rand(0,65000)); // transaction ID
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$buffer3 .= iecType::iecINT(0); // protocol ID
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$buffer3 .= iecType::iecINT($dataLen + 1); // lenght
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$buffer3 .= iecType::iecBYTE($unitId); //unit ID
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// return packet string
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return $buffer3. $buffer2. $buffer1;
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}
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/**
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* readInputDiscretesParser
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*
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* FC 2 response parser, alias to FC 1 parser i.e. readCoilsParser.
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*
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* @param type $packet
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* @param type $quantity
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* @return type
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*/
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private function readInputDiscretesParser($packet, $quantity){
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return $this->readCoilsParser($packet, $quantity);
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}
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/**
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* readMultipleRegisters
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*
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* Modbus function FC 3(0x03) - Read Multiple Registers.
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*
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* This function reads {@link $quantity} of Words (2 bytes) from reference
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* {@link $referenceRead} of a memory of a Modbus device given by
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* {@link $unitId}.
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*
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*
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* @param int $unitId usually ID of Modbus device
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* @param int $reference Reference in the device memory to read data (e.g. in device WAGO 750-841, memory MW0 starts at address 12288).
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* @param int $quantity Amounth of the data to be read from device.
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* @return false|Array Success flag or array of received data.
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*/
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function readMultipleRegisters($unitId, $reference, $quantity){
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$this->status .= "readMultipleRegisters: START\n";
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// connect
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$this->connect();
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// send FC 3
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$packet = $this->readMultipleRegistersPacketBuilder($unitId, $reference, $quantity);
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$this->status .= $this->printPacket($packet);
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$this->send($packet);
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// receive response
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$rpacket = $this->rec();
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$this->status .= $this->printPacket($rpacket);
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// parse packet
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$receivedData = $this->readMultipleRegistersParser($rpacket);
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// disconnect
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$this->disconnect();
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$this->status .= "readMultipleRegisters: DONE\n";
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// return
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return $receivedData;
|
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}
|
|
|
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/**
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* fc3
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*
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* Alias to {@link readMultipleRegisters} method.
|
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*
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* @param int $unitId
|
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* @param int $reference
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* @param int $quantity
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* @return false|Array
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*/
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function fc3($unitId, $reference, $quantity){
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return $this->readMultipleRegisters($unitId, $reference, $quantity);
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}
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|
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/**
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* readMultipleRegistersPacketBuilder
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*
|
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* Packet FC 3 builder - read multiple registers
|
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*
|
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* @param int $unitId
|
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* @param int $reference
|
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* @param int $quantity
|
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* @return string
|
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*/
|
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private function readMultipleRegistersPacketBuilder($unitId, $reference, $quantity){
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$dataLen = 0;
|
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// build data section
|
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$buffer1 = "";
|
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// build body
|
|
$buffer2 = "";
|
|
$buffer2 .= iecType::iecBYTE(3); // FC 3 = 3(0x03)
|
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// build body - read section
|
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$buffer2 .= iecType::iecINT($reference); // refnumber = 12288
|
|
$buffer2 .= iecType::iecINT($quantity); // quantity
|
|
$dataLen += 5;
|
|
// build header
|
|
$buffer3 = '';
|
|
$buffer3 .= iecType::iecINT(rand(0,65000)); // transaction ID
|
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$buffer3 .= iecType::iecINT(0); // protocol ID
|
|
$buffer3 .= iecType::iecINT($dataLen + 1); // lenght
|
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$buffer3 .= iecType::iecBYTE($unitId); //unit ID
|
|
// return packet string
|
|
return $buffer3. $buffer2. $buffer1;
|
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}
|
|
|
|
/**
|
|
* readMultipleRegistersParser
|
|
*
|
|
* FC 3 response parser
|
|
*
|
|
* @param string $packet
|
|
* @return array
|
|
*/
|
|
private function readMultipleRegistersParser($packet){
|
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$data = array();
|
|
// check Response code
|
|
$this->responseCode($packet);
|
|
// get data
|
|
for($i=0;$i<ord($packet[8]);$i++){
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$data[$i] = ord($packet[9+$i]);
|
|
}
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* writeSingleRegister
|
|
*
|
|
* Modbus function FC6(0x06) - Write Single Register.
|
|
*
|
|
* This function writes {@link $data} single word value at {@link $reference} position of
|
|
* memory of a Modbus device given by {@link $unitId}.
|
|
*
|
|
*
|
|
* @param int $unitId usually ID of Modbus device
|
|
* @param int $reference Reference in the device memory (e.g. in device WAGO 750-841, memory MW0 starts at address 12288)
|
|
* @param array $data Array of values to be written.
|
|
* @param array $dataTypes Array of types of values to be written. The array should consists of string "INT", "DINT" and "REAL".
|
|
* @return bool Success flag
|
|
*/
|
|
function writeSingleRegister($unitId, $reference, $data, $dataTypes){
|
|
$this->status .= "writeSingleRegister: START\n";
|
|
// connect
|
|
$this->connect();
|
|
// send FC6
|
|
$packet = $this->writeSingleRegisterPacketBuilder($unitId, $reference, $data, $dataTypes);
|
|
$this->status .= $this->printPacket($packet);
|
|
$this->send($packet);
|
|
// receive response
|
|
$rpacket = $this->rec();
|
|
$this->status .= $this->printPacket($rpacket);
|
|
// parse packet
|
|
$this->writeSingleRegisterParser($rpacket);
|
|
// disconnect
|
|
$this->disconnect();
|
|
$this->status .= "writeSingleRegister: DONE\n";
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* fc6
|
|
*
|
|
* Alias to {@link writeSingleRegister} method
|
|
*
|
|
* @param int $unitId
|
|
* @param int $reference
|
|
* @param array $data
|
|
* @param array $dataTypes
|
|
* @return bool
|
|
*/
|
|
function fc6($unitId, $reference, $data, $dataTypes){
|
|
return $this->writeSingleRegister($unitId, $reference, $data, $dataTypes);
|
|
}
|
|
|
|
|
|
/**
|
|
* writeSingleRegisterPacketBuilder
|
|
*
|
|
* Packet builder FC6 - WRITE single register
|
|
*
|
|
* @param int $unitId
|
|
* @param int $reference
|
|
* @param array $data
|
|
* @param array $dataTypes
|
|
* @return string
|
|
*/
|
|
private function writeSingleRegisterPacketBuilder($unitId, $reference, $data, $dataTypes){
|
|
$dataLen = 0;
|
|
// build data section
|
|
$buffer1 = "";
|
|
foreach($data as $key=>$dataitem) {
|
|
$buffer1 .= iecType::iecINT($dataitem); // register values x
|
|
$dataLen += 2;
|
|
break;
|
|
}
|
|
// build body
|
|
$buffer2 = "";
|
|
$buffer2 .= iecType::iecBYTE(6); // FC6 = 6(0x06)
|
|
$buffer2 .= iecType::iecINT($reference); // refnumber = 12288
|
|
$dataLen += 3;
|
|
// build header
|
|
$buffer3 = '';
|
|
$buffer3 .= iecType::iecINT(rand(0,65000)); // transaction ID
|
|
$buffer3 .= iecType::iecINT(0); // protocol ID
|
|
$buffer3 .= iecType::iecINT($dataLen + 1); // lenght
|
|
$buffer3 .= iecType::iecBYTE($unitId); //unit ID
|
|
|
|
// return packet string
|
|
return $buffer3. $buffer2. $buffer1;
|
|
}
|
|
|
|
/**
|
|
* writeSingleRegisterParser
|
|
*
|
|
* FC6 response parser
|
|
*
|
|
* @param string $packet
|
|
* @return bool
|
|
*/
|
|
private function writeSingleRegisterParser($packet){
|
|
$this->responseCode($packet);
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* writeMultipleCoils
|
|
*
|
|
* Modbus function FC15(0x0F) - Write Multiple Coils
|
|
*
|
|
* This function writes {@link $data} array at {@link $reference} position of
|
|
* memory of a Modbus device given by {@link $unitId}.
|
|
*
|
|
* @param type $unitId
|
|
* @param type $reference
|
|
* @param type $data
|
|
* @return type
|
|
*/
|
|
function writeMultipleCoils($unitId, $reference, $data){
|
|
$this->status .= "writeMultipleCoils: START\n";
|
|
// connect
|
|
$this->connect();
|
|
// send FC15
|
|
$packet = $this->writeMultipleCoilsPacketBuilder($unitId, $reference, $data);
|
|
$this->status .= $this->printPacket($packet);
|
|
$this->send($packet);
|
|
// receive response
|
|
$rpacket = $this->rec();
|
|
$this->status .= $this->printPacket($rpacket);
|
|
// parse packet
|
|
$this->writeMultipleCoilsParser($rpacket);
|
|
// disconnect
|
|
$this->disconnect();
|
|
$this->status .= "writeMultipleCoils: DONE\n";
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* fc15
|
|
*
|
|
* Alias to {@link writeMultipleCoils} method
|
|
*
|
|
* @param int $unitId
|
|
* @param int $reference
|
|
* @param array $data
|
|
* @return bool
|
|
*/
|
|
function fc15($unitId, $reference, $data){
|
|
return $this->writeMultipleCoils($unitId, $reference, $data);
|
|
}
|
|
|
|
/**
|
|
* writeMultipleCoilsPacketBuilder
|
|
*
|
|
* Packet builder FC15 - Write multiple coils
|
|
*
|
|
* @param int $unitId
|
|
* @param int $reference
|
|
* @param array $data
|
|
* @return string
|
|
*/
|
|
private function writeMultipleCoilsPacketBuilder($unitId, $reference, $data){
|
|
$dataLen = 0;
|
|
// build bool stream to the WORD array
|
|
$data_word_stream = array();
|
|
$data_word = 0;
|
|
$shift = 0;
|
|
for($i=0;$i<count($data);$i++) {
|
|
if((($i % 8) == 0) && ($i > 0)) {
|
|
$data_word_stream[] = $data_word;
|
|
$shift = 0;
|
|
$data_word = 0;
|
|
$data_word |= (0x01 && $data[$i]) << $shift;
|
|
$shift++;
|
|
}
|
|
else {
|
|
$data_word |= (0x01 && $data[$i]) << $shift;
|
|
$shift++;
|
|
}
|
|
}
|
|
$data_word_stream[] = $data_word;
|
|
// show binary stream to status string
|
|
foreach($data_word_stream as $d){
|
|
$this->status .= sprintf("byte=b%08b\n", $d);
|
|
}
|
|
// build data section
|
|
$buffer1 = "";
|
|
foreach($data_word_stream as $key=>$dataitem) {
|
|
$buffer1 .= iecType::iecBYTE($dataitem); // register values x
|
|
$dataLen += 1;
|
|
}
|
|
// build body
|
|
$buffer2 = "";
|
|
$buffer2 .= iecType::iecBYTE(15); // FC 15 = 15(0x0f)
|
|
$buffer2 .= iecType::iecINT($reference); // refnumber = 12288
|
|
$buffer2 .= iecType::iecINT(count($data)); // bit count
|
|
$buffer2 .= iecType::iecBYTE((count($data)+7)/8); // byte count
|
|
$dataLen += 6;
|
|
// build header
|
|
$buffer3 = '';
|
|
$buffer3 .= iecType::iecINT(rand(0,65000)); // transaction ID
|
|
$buffer3 .= iecType::iecINT(0); // protocol ID
|
|
$buffer3 .= iecType::iecINT($dataLen + 1); // lenght
|
|
$buffer3 .= iecType::iecBYTE($unitId); // unit ID
|
|
|
|
// return packet string
|
|
return $buffer3. $buffer2. $buffer1;
|
|
}
|
|
|
|
/**
|
|
* writeMultipleCoilsParser
|
|
*
|
|
* FC15 response parser
|
|
*
|
|
* @param string $packet
|
|
* @return bool
|
|
*/
|
|
private function writeMultipleCoilsParser($packet){
|
|
$this->responseCode($packet);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* writeMultipleRegister
|
|
*
|
|
* Modbus function FC16(0x10) - Write Multiple Register.
|
|
*
|
|
* This function writes {@link $data} array at {@link $reference} position of
|
|
* memory of a Modbus device given by {@link $unitId}.
|
|
*
|
|
*
|
|
* @param int $unitId usually ID of Modbus device
|
|
* @param int $reference Reference in the device memory (e.g. in device WAGO 750-841, memory MW0 starts at address 12288)
|
|
* @param array $data Array of values to be written.
|
|
* @param array $dataTypes Array of types of values to be written. The array should consists of string "INT", "DINT" and "REAL".
|
|
* @return bool Success flag
|
|
*/
|
|
function writeMultipleRegister($unitId, $reference, $data, $dataTypes){
|
|
$this->status .= "writeMultipleRegister: START\n";
|
|
// connect
|
|
$this->connect();
|
|
// send FC16
|
|
$packet = $this->writeMultipleRegisterPacketBuilder($unitId, $reference, $data, $dataTypes);
|
|
$this->status .= $this->printPacket($packet);
|
|
$this->send($packet);
|
|
// receive response
|
|
$rpacket = $this->rec();
|
|
$this->status .= $this->printPacket($rpacket);
|
|
// parse packet
|
|
$this->writeMultipleRegisterParser($rpacket);
|
|
// disconnect
|
|
$this->disconnect();
|
|
$this->status .= "writeMultipleRegister: DONE\n";
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* fc16
|
|
*
|
|
* Alias to {@link writeMultipleRegister} method
|
|
*
|
|
* @param int $unitId
|
|
* @param int $reference
|
|
* @param array $data
|
|
* @param array $dataTypes
|
|
* @return bool
|
|
*/
|
|
function fc16($unitId, $reference, $data, $dataTypes){
|
|
return $this->writeMultipleRegister($unitId, $reference, $data, $dataTypes);
|
|
}
|
|
|
|
|
|
/**
|
|
* writeMultipleRegisterPacketBuilder
|
|
*
|
|
* Packet builder FC16 - WRITE multiple register
|
|
* e.g.: 4dd90000000d0010300000030603e807d00bb8
|
|
*
|
|
* @param int $unitId
|
|
* @param int $reference
|
|
* @param array $data
|
|
* @param array $dataTypes
|
|
* @return string
|
|
*/
|
|
private function writeMultipleRegisterPacketBuilder($unitId, $reference, $data, $dataTypes){
|
|
$dataLen = 0;
|
|
// build data section
|
|
$buffer1 = "";
|
|
foreach($data as $key=>$dataitem) {
|
|
if($dataTypes[$key]=="INT"){
|
|
$buffer1 .= iecType::iecINT($dataitem); // register values x
|
|
$dataLen += 2;
|
|
}
|
|
elseif($dataTypes[$key]=="DINT"){
|
|
$buffer1 .= iecType::iecDINT($dataitem, $this->endianness); // register values x
|
|
$dataLen += 4;
|
|
}
|
|
elseif($dataTypes[$key]=="REAL") {
|
|
$buffer1 .= iecType::iecREAL($dataitem, $this->endianness); // register values x
|
|
$dataLen += 4;
|
|
}
|
|
else{
|
|
$buffer1 .= iecType::iecINT($dataitem); // register values x
|
|
$dataLen += 2;
|
|
}
|
|
}
|
|
// build body
|
|
$buffer2 = "";
|
|
$buffer2 .= iecType::iecBYTE(16); // FC 16 = 16(0x10)
|
|
$buffer2 .= iecType::iecINT($reference); // refnumber = 12288
|
|
$buffer2 .= iecType::iecINT($dataLen/2); // word count
|
|
$buffer2 .= iecType::iecBYTE($dataLen); // byte count
|
|
$dataLen += 6;
|
|
// build header
|
|
$buffer3 = '';
|
|
$buffer3 .= iecType::iecINT(rand(0,65000)); // transaction ID
|
|
$buffer3 .= iecType::iecINT(0); // protocol ID
|
|
$buffer3 .= iecType::iecINT($dataLen + 1); // lenght
|
|
$buffer3 .= iecType::iecBYTE($unitId); //unit ID
|
|
|
|
// return packet string
|
|
return $buffer3. $buffer2. $buffer1;
|
|
}
|
|
|
|
/**
|
|
* writeMultipleRegisterParser
|
|
*
|
|
* FC16 response parser
|
|
*
|
|
* @param string $packet
|
|
* @return bool
|
|
*/
|
|
private function writeMultipleRegisterParser($packet){
|
|
$this->responseCode($packet);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* readWriteRegisters
|
|
*
|
|
* Modbus function FC23(0x17) - Read Write Registers.
|
|
*
|
|
* This function writes {@link $data} array at reference {@link $referenceWrite}
|
|
* position of memory of a Modbus device given by {@link $unitId}. Simultanously,
|
|
* it returns {@link $quantity} of Words (2 bytes) from reference {@link $referenceRead}.
|
|
*
|
|
*
|
|
* @param int $unitId usually ID of Modbus device
|
|
* @param int $referenceRead Reference in the device memory to read data (e.g. in device WAGO 750-841, memory MW0 starts at address 12288).
|
|
* @param int $quantity Amounth of the data to be read from device.
|
|
* @param int $referenceWrite Reference in the device memory to write data.
|
|
* @param array $data Array of values to be written.
|
|
* @param array $dataTypes Array of types of values to be written. The array should consists of string "INT", "DINT" and "REAL".
|
|
* @return false|Array Success flag or array of data.
|
|
*/
|
|
function readWriteRegisters($unitId, $referenceRead, $quantity, $referenceWrite, $data, $dataTypes){
|
|
$this->status .= "readWriteRegisters: START\n";
|
|
// connect
|
|
$this->connect();
|
|
// send FC23
|
|
$packet = $this->readWriteRegistersPacketBuilder($unitId, $referenceRead, $quantity, $referenceWrite, $data, $dataTypes);
|
|
$this->status .= $this->printPacket($packet);
|
|
$this->send($packet);
|
|
// receive response
|
|
$rpacket = $this->rec();
|
|
$this->status .= $this->printPacket($rpacket);
|
|
// parse packet
|
|
$receivedData = $this->readWriteRegistersParser($rpacket);
|
|
// disconnect
|
|
$this->disconnect();
|
|
$this->status .= "writeMultipleRegister: DONE\n";
|
|
// return
|
|
return $receivedData;
|
|
}
|
|
|
|
/**
|
|
* fc23
|
|
*
|
|
* Alias to {@link readWriteRegisters} method.
|
|
*
|
|
* @param int $unitId
|
|
* @param int $referenceRead
|
|
* @param int $quantity
|
|
* @param int $referenceWrite
|
|
* @param array $data
|
|
* @param array $dataTypes
|
|
* @return false|Array
|
|
*/
|
|
function fc23($unitId, $referenceRead, $quantity, $referenceWrite, $data, $dataTypes){
|
|
return $this->readWriteRegisters($unitId, $referenceRead, $quantity, $referenceWrite, $data, $dataTypes);
|
|
}
|
|
|
|
/**
|
|
* readWriteRegistersPacketBuilder
|
|
*
|
|
* Packet FC23 builder - READ WRITE registers
|
|
*
|
|
*
|
|
* @param int $unitId
|
|
* @param int $referenceRead
|
|
* @param int $quantity
|
|
* @param int $referenceWrite
|
|
* @param array $data
|
|
* @param array $dataTypes
|
|
* @return string
|
|
*/
|
|
private function readWriteRegistersPacketBuilder($unitId, $referenceRead, $quantity, $referenceWrite, $data, $dataTypes){
|
|
$dataLen = 0;
|
|
// build data section
|
|
$buffer1 = "";
|
|
foreach($data as $key => $dataitem) {
|
|
if($dataTypes[$key]=="INT"){
|
|
$buffer1 .= iecType::iecINT($dataitem); // register values x
|
|
$dataLen += 2;
|
|
}
|
|
elseif($dataTypes[$key]=="DINT"){
|
|
$buffer1 .= iecType::iecDINT($dataitem, $this->endianness); // register values x
|
|
$dataLen += 4;
|
|
}
|
|
elseif($dataTypes[$key]=="REAL") {
|
|
$buffer1 .= iecType::iecREAL($dataitem, $this->endianness); // register values x
|
|
$dataLen += 4;
|
|
}
|
|
else{
|
|
$buffer1 .= iecType::iecINT($dataitem); // register values x
|
|
$dataLen += 2;
|
|
}
|
|
}
|
|
// build body
|
|
$buffer2 = "";
|
|
$buffer2 .= iecType::iecBYTE(23); // FC 23 = 23(0x17)
|
|
// build body - read section
|
|
$buffer2 .= iecType::iecINT($referenceRead); // refnumber = 12288
|
|
$buffer2 .= iecType::iecINT($quantity); // quantity
|
|
// build body - write section
|
|
$buffer2 .= iecType::iecINT($referenceWrite); // refnumber = 12288
|
|
$buffer2 .= iecType::iecINT($dataLen/2); // word count
|
|
$buffer2 .= iecType::iecBYTE($dataLen); // byte count
|
|
$dataLen += 10;
|
|
// build header
|
|
$buffer3 = '';
|
|
$buffer3 .= iecType::iecINT(rand(0,65000)); // transaction ID
|
|
$buffer3 .= iecType::iecINT(0); // protocol ID
|
|
$buffer3 .= iecType::iecINT($dataLen + 1); // lenght
|
|
$buffer3 .= iecType::iecBYTE($unitId); //unit ID
|
|
|
|
// return packet string
|
|
return $buffer3. $buffer2. $buffer1;
|
|
}
|
|
|
|
|
|
/**
|
|
* readWriteRegistersParser
|
|
*
|
|
* FC23 response parser
|
|
*
|
|
* @param string $packet
|
|
* @return array
|
|
*/
|
|
private function readWriteRegistersParser($packet){
|
|
$data = array();
|
|
// if not exception
|
|
if(!$this->responseCode($packet))
|
|
return false;
|
|
// get data
|
|
for($i=0;$i<ord($packet[8]);$i++){
|
|
$data[$i] = ord($packet[9+$i]);
|
|
}
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* byte2hex
|
|
*
|
|
* Parse data and get it to the Hex form
|
|
*
|
|
* @param char $value
|
|
* @return string
|
|
*/
|
|
private function byte2hex($value){
|
|
$h = dechex(($value >> 4) & 0x0F);
|
|
$l = dechex($value & 0x0F);
|
|
return "$h$l";
|
|
}
|
|
|
|
/**
|
|
* printPacket
|
|
*
|
|
* Print a packet in the hex form
|
|
*
|
|
* @param string $packet
|
|
* @return string
|
|
*/
|
|
private function printPacket($packet){
|
|
$str = "";
|
|
$str .= "Packet: ";
|
|
for($i=0;$i<strlen($packet);$i++){
|
|
$str .= $this->byte2hex(ord($packet[$i]));
|
|
}
|
|
$str .= "\n";
|
|
return $str;
|
|
}
|
|
}
|
|
|