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@ -37,6 +37,8 @@ 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 $endianess = 0; // defines endian codding (little endian == 0, big endian == 1) |
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@ -71,6 +73,16 @@ class ModbusMasterUdp { |
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private function connect(){ |
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// UDP socket |
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$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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@ -158,6 +170,121 @@ class ModbusMasterUdp { |
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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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@ -257,6 +384,124 @@ class ModbusMasterUdp { |
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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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* 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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* writeMultipleRegister |
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* |
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@ -322,6 +567,7 @@ class ModbusMasterUdp { |
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*/ |
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private function writeMultipleRegisterPacketBuilder($unitId, $reference, $data, $dataTypes){ |
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$dataLen = 0; |
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$endianness = 0; |
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// build data section |
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$buffer1 = ""; |
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foreach($data as $key=>$dataitem) { |
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@ -330,11 +576,11 @@ class ModbusMasterUdp { |
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$dataLen += 2; |
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} |
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elseif($dataTypes[$key]=="DINT"){ |
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$buffer1 .= iecType::iecDINT($dataitem, $endianess); // register values x |
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$buffer1 .= iecType::iecDINT($dataitem, $endianness); // register values x |
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$dataLen += 4; |
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} |
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elseif($dataTypes[$key]=="REAL") { |
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$buffer1 .= iecType::iecREAL($dataitem, $endianess); // register values x |
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$buffer1 .= iecType::iecREAL($dataitem, $endianness); // register values x |
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$dataLen += 4; |
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} |
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else{ |
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@ -369,7 +615,7 @@ class ModbusMasterUdp { |
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* @return bool |
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*/ |
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private function writeMultipleRegisterParser($packet){ |
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$this->responseCode($rpacket); |
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$this->responseCode($packet); |
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return true; |
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} |
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@ -444,6 +690,7 @@ class ModbusMasterUdp { |
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*/ |
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private function readWriteRegistersPacketBuilder($unitId, $referenceRead, $quantity, $referenceWrite, $data, $dataTypes){ |
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$dataLen = 0; |
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$endianness = 0; |
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// build data section |
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$buffer1 = ""; |
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foreach($data as $key => $dataitem) { |
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@ -452,11 +699,11 @@ class ModbusMasterUdp { |
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$dataLen += 2; |
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} |
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elseif($dataTypes[$key]=="DINT"){ |
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$buffer1 .= iecType::iecDINT($dataitem, $endianess); // register values x |
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$buffer1 .= iecType::iecDINT($dataitem, $endianness); // register values x |
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$dataLen += 4; |
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} |
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elseif($dataTypes[$key]=="REAL") { |
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$buffer1 .= iecType::iecREAL($dataitem, $endianess); // register values x |
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$buffer1 .= iecType::iecREAL($dataitem, $endianness); // register values x |
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$dataLen += 4; |
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} |
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else{ |
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John Long
12 years ago