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790 lines
23 KiB
790 lines
23 KiB
<?php
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/**
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* Phpmodbus Copyright (c) 2004, 2010 Jan Krakora, WAGO Kontakttechnik GmbH & Co. KG (http://www.wago.com)
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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, 2010 Jan Krakora, WAGO Kontakttechnik GmbH & Co. KG (http://www.wago.com)
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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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* ModbusMasterUdp
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*
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* This class deals with the MODBUS master using UDP stack.
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*
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* Implemented MODBUS functions:
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* - FC 3: read multiple registers
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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, 2010 Jan Krakora, WAGO Kontakttechnik GmbH & Co. KG (http://www.wago.com)
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* @package Phpmodbus
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*
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*/
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class ModbusMasterUdp {
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var $sock;
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var $port = "502";
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var $host = "192.168.1.1";
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var $client = "";
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var $client_port = "502";
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var $status;
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var $timeout_sec = 5; // 5 sec
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var $endianess = 0; // defines endian codding (little endian == 0, big endian == 1)
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/**
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* Modbus
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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 $host An IP address of a Modbus TCP device. E.g. "192.168.1.1".
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*/
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function ModbusMasterUdp($host){
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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>" . $this->status . "</pre>";
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}
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/**
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* connect
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*
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* Connect the socket
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*
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* @return bool
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*/
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private function connect(){
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// UDP socket
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$this->sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
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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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$this->status .= "Bound\n";
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}
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}
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// connect
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$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(($packet[7] & 0x80) > 0) {
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throw new Exception("Modbus response error code:" . ord($packet[8]));
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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 $referenceRead} 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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$this->connect();
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// send FC 3
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$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 readMultipleCoils} 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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* 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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* 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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$buffer1 = "";
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// build body
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$buffer2 = "";
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$buffer2 .= iecType::iecBYTE(3); // FC 3 = 3(0x03)
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// build body - read section
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$buffer2 .= iecType::iecINT($reference); // refnumber = 12288
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$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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* readMultipleRegistersParser
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*
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* FC 3 response parser
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*
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* @param string $packet
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* @return array
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*/
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private function readMultipleRegistersParser($packet){
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$data = array();
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// check Response code
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$this->responseCode($packet);
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// get data
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for($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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return $data;
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}
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/**
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* writeMultipleCoils
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*
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* Modbus function FC15(0x0F) - Write Multiple Coils
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*
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* This function writes {@link $data} array at {@link $reference} position of
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* memory of a Modbus device given by {@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 $data
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* @return type
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*/
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function writeMultipleCoils($unitId, $reference, $data){
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$this->status .= "writeMultipleCoils: START\n";
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// connect
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$this->connect();
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// send FC16
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$packet = $this->writeMultipleCoilsPacketBuilder($unitId, $reference, $data);
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$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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$this->writeMultipleCoilsParser($rpacket);
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// disconnect
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$this->disconnect();
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$this->status .= "writeMultipleCoils: DONE\n";
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return true;
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}
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/**
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* fc15
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*
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* Alias to {@link writeMultipleCoils} method
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*
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* @param int $unitId
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* @param int $reference
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* @param array $data
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* @return bool
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*/
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function fc15($unitId, $reference, $data){
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return $this->writeMultipleCoils($unitId, $reference, $data);
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}
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/**
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* writeMultipleCoilsPacketBuilder
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*
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* Packet builder FC15 - Write multiple coils
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*
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* @param int $unitId
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* @param int $reference
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* @param array $data
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* @return string
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*/
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private function writeMultipleCoilsPacketBuilder($unitId, $reference, $data){
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$dataLen = 0;
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$endianness = 0;
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// build bool stream to the WORD array
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$data_word_stream = array();
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$data_word = 0;
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$shift = 0;
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for($i=0;$i<count($data);$i++) {
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if((($i % 8) == 0) && ($i > 0)) {
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$data_word_stream[] = $data_word;
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$shift = 0;
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$data_word = 0;
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$data_word |= (0x01 && $data[$i]) << $shift;
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$shift++;
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}
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else {
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$data_word |= (0x01 && $data[$i]) << $shift;
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$shift++;
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}
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}
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$data_word_stream[] = $data_word;
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// show binary stream to status string
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foreach($data_word_stream as $d){
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$this->status .= sprintf("byte=b%08b\n", $d);
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}
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// build data section
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$buffer1 = "";
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foreach($data_word_stream as $key=>$dataitem) {
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$buffer1 .= iecType::iecBYTE($dataitem); // register values x
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$dataLen += 1;
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}
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// build body
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$buffer2 = "";
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$buffer2 .= iecType::iecBYTE(15); // FC 15 = 15(0x0f)
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$buffer2 .= iecType::iecINT($reference); // refnumber = 12288
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$buffer2 .= iecType::iecINT(count($data)); // bit count
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$buffer2 .= iecType::iecBYTE((count($data)+7)/8); // byte count
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$dataLen += 6;
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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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/**
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* writeMultipleCoilsParser
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*
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* FC15 response parser
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*
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* @param string $packet
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* @return bool
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*/
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private function writeMultipleCoilsParser($packet){
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$this->responseCode($packet);
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return true;
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}
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|
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/**
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* writeMultipleRegister
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*
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* Modbus function FC16(0x10) - Write Multiple Register.
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*
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* This function writes {@link $data} array at {@link $reference} position of
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* memory of a Modbus device given by {@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 (e.g. in device WAGO 750-841, memory MW0 starts at address 12288)
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* @param array $data Array of values to be written.
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* @param array $dataTypes Array of types of values to be written. The array should consists of string "INT", "DINT" and "REAL".
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* @return bool Success flag
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*/
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function writeMultipleRegister($unitId, $reference, $data, $dataTypes){
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$this->status .= "writeMultipleRegister: START\n";
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// connect
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$this->connect();
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// send FC16
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$packet = $this->writeMultipleRegisterPacketBuilder($unitId, $reference, $data, $dataTypes);
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$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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$this->writeMultipleRegisterParser($rpacket);
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// disconnect
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$this->disconnect();
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$this->status .= "writeMultipleRegister: DONE\n";
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return true;
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}
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|
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/**
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* fc16
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*
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* 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;
|
|
$endianness = 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, $endianness); // register values x
|
|
$dataLen += 4;
|
|
}
|
|
elseif($dataTypes[$key]=="REAL") {
|
|
$buffer1 .= iecType::iecREAL($dataitem, $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;
|
|
$endianness = 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, $endianness); // register values x
|
|
$dataLen += 4;
|
|
}
|
|
elseif($dataTypes[$key]=="REAL") {
|
|
$buffer1 .= iecType::iecREAL($dataitem, $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;
|
|
}
|
|
}
|
|
|
|
?>
|