diff --git a/Phpmodbus/ModbusMasterUdp.php b/Phpmodbus/ModbusMasterUdp.php
index 8fb6635..78f3e01 100644
--- a/Phpmodbus/ModbusMasterUdp.php
+++ b/Phpmodbus/ModbusMasterUdp.php
@@ -37,6 +37,8 @@ class ModbusMasterUdp {
   var $sock;
   var $port = "502";
   var $host = "192.168.1.1";
+  var $client = "";
+  var $client_port = "502";
   var $status;
   var $timeout_sec = 5; // 5 sec
   var $endianess = 0; // defines endian codding (little endian == 0, big endian == 1) 
@@ -70,7 +72,17 @@ class ModbusMasterUdp {
    */
   private function connect(){
     // UDP socket
-    $this->sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);    
+    $this->sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
+    // Bind the client socket to a specific local port
+    if (strlen($this->client)>0){
+        $result = socket_bind($this->sock, $this->client, $this->client_port);
+        if ($result === false) {
+            throw new Exception("socket_bind() failed.</br>Reason: ($result)".
+                socket_strerror(socket_last_error($this->sock)));
+        } else {
+            $this->status .= "Bound\n";
+        }
+    }
     // connect
     $result = @socket_connect($this->sock, $this->host, $this->port);
     if ($result === false) {
@@ -158,6 +170,121 @@ class ModbusMasterUdp {
     }    
   }
   
+  /**
+   * readCoils
+   * 
+   * Modbus function FC 1(0x01) - Read Coils
+   * 
+   * Reads {@link $quantity} of Coils (boolean) from reference 
+   * {@link $referenceRead} of a memory of a Modbus device given by 
+   * {@link $unitId}.
+   * 
+   * @param type $unitId
+   * @param type $reference
+   * @param type $quantity 
+   */
+  function readCoils($unitId, $reference, $quantity){
+    $this->status .= "readCoils: START\n";
+    // connect
+    $this->connect();
+    // send FC 3    
+    $packet = $this->readCoilsPacketBuilder($unitId, $reference, $quantity);
+    $this->status .= $this->printPacket($packet);    
+    $this->send($packet);
+    // receive response
+    $rpacket = $this->rec();
+    $this->status .= $this->printPacket($rpacket);    
+    // parse packet    
+    $receivedData = $this->readCoilsParser($rpacket, $quantity);
+    // disconnect
+    $this->disconnect();
+    $this->status .= "readCoils: DONE\n";
+    // return
+    return $receivedData;
+  }
+  
+  /**
+   * fc1
+   * 
+   * Alias to {@link readMultipleCoils} method
+   * 
+   * @param type $unitId
+   * @param type $reference
+   * @param type $quantity
+   * @return type 
+   */
+  function fc1($unitId, $reference, $quantity){
+    return $this->readCoils($unitId, $reference, $quantity);
+  }
+  
+  /**
+   * readCoilsPacketBuilder
+   * 
+   * FC1 packet builder - read coils
+   * 
+   * @param type $unitId
+   * @param type $reference
+   * @param type $quantity
+   * @return type 
+   */
+  private function readCoilsPacketBuilder($unitId, $reference, $quantity){
+    $dataLen = 0;
+    // build data section
+    $buffer1 = "";
+    // build body
+    $buffer2 = "";
+    $buffer2 .= iecType::iecBYTE(1);              // FC 1 = 1(0x01)
+    // build body - read section    
+    $buffer2 .= iecType::iecINT($reference);      // refnumber = 12288      
+    $buffer2 .= iecType::iecINT($quantity);       // quantity
+    $dataLen += 5;
+    // 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;
+  }
+  
+  /**
+   * readCoilsParser
+   * 
+   * FC 1 response parser
+   * 
+   * @param type $packet
+   * @param type $quantity
+   * @return type 
+   */
+  private function readCoilsParser($packet, $quantity){    
+    $data = array();
+    // check Response code
+    $this->responseCode($packet);
+    // get data from stream
+    for($i=0;$i<ord($packet[8]);$i++){
+      $data[$i] = ord($packet[9+$i]);
+    }    
+    // get bool values to array
+    $data_bolean_array = array();
+    $di = 0;
+    foreach($data as $value){
+      for($i=0;$i<8;$i++){
+        if($di > $quantity) continue;
+        // get boolean value 
+        $v = ($value >> $i) & 0x01;
+        // build boolean array
+        if($v == 0){
+          $data_bolean_array[] = FALSE;
+        } else {
+          $data_bolean_array[] = TRUE;
+        }
+        $di++;
+      }
+    }
+    return $data_bolean_array;
+  }
+  
   /**
    * readMultipleRegisters
    *
@@ -205,8 +332,8 @@ class ModbusMasterUdp {
    */
   function fc3($unitId, $reference, $quantity){
     return $this->readMultipleRegisters($unitId, $reference, $quantity);
-  }
-
+  }  
+  
   /**
    * readMultipleRegistersPacketBuilder
    *
@@ -257,6 +384,124 @@ class ModbusMasterUdp {
     return $data;
   }
   
+  /**
+   * 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 FC16    
+    $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;
+    $endianness = 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
    *
@@ -321,7 +566,8 @@ class ModbusMasterUdp {
    * @return string
    */
   private function writeMultipleRegisterPacketBuilder($unitId, $reference, $data, $dataTypes){
-    $dataLen = 0;        
+    $dataLen = 0;
+    $endianness = 0;
     // build data section
     $buffer1 = "";
     foreach($data as $key=>$dataitem) {
@@ -330,11 +576,11 @@ class ModbusMasterUdp {
         $dataLen += 2;
       }
       elseif($dataTypes[$key]=="DINT"){
-        $buffer1 .= iecType::iecDINT($dataitem, $endianess);   // register values x
+        $buffer1 .= iecType::iecDINT($dataitem, $endianness);   // register values x
         $dataLen += 4;
       }
       elseif($dataTypes[$key]=="REAL") {
-        $buffer1 .= iecType::iecREAL($dataitem, $endianess);   // register values x        
+        $buffer1 .= iecType::iecREAL($dataitem, $endianness);   // register values x
         $dataLen += 4;
       }       
       else{
@@ -369,7 +615,7 @@ class ModbusMasterUdp {
    * @return bool
    */
   private function writeMultipleRegisterParser($packet){
-    $this->responseCode($rpacket);
+    $this->responseCode($packet);
     return true;
   }
   
@@ -443,7 +689,8 @@ class ModbusMasterUdp {
    * @return string
    */
   private function readWriteRegistersPacketBuilder($unitId, $referenceRead, $quantity, $referenceWrite, $data, $dataTypes){
-    $dataLen = 0;        
+    $dataLen = 0;
+    $endianness = 0;
     // build data section
     $buffer1 = "";
     foreach($data as $key => $dataitem) {
@@ -452,11 +699,11 @@ class ModbusMasterUdp {
         $dataLen += 2;
       }
       elseif($dataTypes[$key]=="DINT"){
-        $buffer1 .= iecType::iecDINT($dataitem, $endianess);   // register values x
+        $buffer1 .= iecType::iecDINT($dataitem, $endianness);   // register values x
         $dataLen += 4;
       }
       elseif($dataTypes[$key]=="REAL") {
-        $buffer1 .= iecType::iecREAL($dataitem, $endianess);   // register values x        
+        $buffer1 .= iecType::iecREAL($dataitem, $endianness);   // register values x
         $dataLen += 4;
       }       
       else{
diff --git a/examples/example_750841_Mmemory.php b/examples/example_750841_Mmemory.php
index d6909bd..2d153a6 100644
--- a/examples/example_750841_Mmemory.php
+++ b/examples/example_750841_Mmemory.php
@@ -3,7 +3,6 @@
 require_once dirname(__FILE__) . '/../Phpmodbus/ModbusMasterUdp.php';
 
 // Create Modbus object
-// $ip = "192.168.1.1";
 $ip = "192.192.15.51";
 $modbus = new ModbusMasterUdp($ip);
 
@@ -14,7 +13,6 @@ try {
     $mw0address = 12288;
     $quantity = 6;
     $recData = $modbus->readMultipleRegisters($moduleId, $reference, $quantity);
-    print_r($recData);
 }
 catch (Exception $e) {
     echo $modbus;
diff --git a/examples/example_fc1.php b/examples/example_fc1.php
new file mode 100644
index 0000000..7f74696
--- /dev/null
+++ b/examples/example_fc1.php
@@ -0,0 +1,25 @@
+<?php
+
+require_once dirname(__FILE__) . '/../Phpmodbus/ModbusMasterUdp.php';
+
+// Create Modbus object
+$modbus = new ModbusMasterUdp("192.192.15.51");
+
+try {
+    // FC 1
+    $recData = $modbus->readCoils(0, 12288, 12);
+}
+catch (Exception $e) {
+    // Print error information if any
+    echo $modbus;
+    echo $e;
+    exit;
+}
+
+// Print status information
+echo "</br>Status:</br>" . $modbus;
+
+// Print read data
+echo "</br>Data:</br>";
+var_dump($recData); 
+echo "</br>";
\ No newline at end of file
diff --git a/examples/example_fc15.php b/examples/example_fc15.php
new file mode 100644
index 0000000..3b843fc
--- /dev/null
+++ b/examples/example_fc15.php
@@ -0,0 +1,26 @@
+<?php
+
+require_once dirname(__FILE__) . '/../Phpmodbus/ModbusMasterUdp.php';
+
+// Create Modbus object
+$modbus = new ModbusMasterUdp("192.192.15.51");
+
+// Data to be writen
+$data = array(TRUE, FALSE, TRUE, TRUE, FALSE, TRUE, TRUE, TRUE, 
+              TRUE, TRUE, TRUE, TRUE, FALSE, FALSE, FALSE, FALSE,
+              FALSE, FALSE, FALSE, FALSE, TRUE, TRUE, TRUE, TRUE,
+              TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE);
+
+try {
+    // FC15
+    $modbus->writeMultipleCoils(0, 12288, $data);
+}
+catch (Exception $e) {
+    // Print error information if any
+    echo $modbus;
+    echo $e;
+    exit;
+}
+
+// Print status information
+echo $modbus;
diff --git a/examples/example_fc16.php b/examples/example_fc16.php
index ddd3846..9f11112 100644
--- a/examples/example_fc16.php
+++ b/examples/example_fc16.php
@@ -6,8 +6,8 @@ require_once dirname(__FILE__) . '/../Phpmodbus/ModbusMasterUdp.php';
 $modbus = new ModbusMasterUdp("192.192.15.51");
 
 // Data to be writen
-$data = array(1000, 2000, 3.0);
-$dataTypes = array("INT", "DINT", "REAL");
+$data = array(10, -1000, 2000, 3.0);
+$dataTypes = array("WORD", "INT", "DINT", "REAL");
 
 try {
     // FC16
diff --git a/examples/example_fc23.php b/examples/example_fc23.php
index 98cea54..2923f1c 100644
--- a/examples/example_fc23.php
+++ b/examples/example_fc23.php
@@ -6,8 +6,8 @@ require_once dirname(__FILE__) . '/../Phpmodbus/ModbusMasterUdp.php';
 $modbus = new ModbusMasterUdp("192.192.15.51");
 
 // Data to be writen
-$data = array(1000, 2000, 3.0);
-$dataTypes = array("INT", "DINT", "REAL");
+$data = array(10, -1000, 2000, 3.0);
+$dataTypes = array("WORD", "INT", "DINT", "REAL");
 
 try {
     // FC23
diff --git a/license.txt b/license.txt
index 427e411..edea02a 100644
--- a/license.txt
+++ b/license.txt
@@ -1,7 +1,7 @@
 The Phpmodbus License, Version 1
 ============================
 
-Copyright (c) 2004, 2008 Jan Krakora, Wago (http://www.wago.com)
+Copyright (c) 2004, 2011 Jan Krakora, Wago (http://www.wago.com)
 All rights reserved.
 
 This license is a legal agreement between you and Jan Krakora, Wago (the "Author")
diff --git a/tests/IecType/ref/test.iecReal.php.html b/tests/IecType/ref/test.iecReal.php.html
index 0fdc700..661237e 100644
--- a/tests/IecType/ref/test.iecReal.php.html
+++ b/tests/IecType/ref/test.iecReal.php.html
@@ -1 +1,12 @@
-Endianing off <hr>0 --> Packet: 0000_0000_</br>1 --> Packet: 0000_3f80_</br>-2 --> Packet: 0000_c000_</br>0.333333333333 --> Packet: aaaa_3eaa_</br>25 --> Packet: 0000_41c8_</br>Endianing on <hr>0 --> Packet: 0000_0000_</br>1 --> Packet: 3f80_0000_</br>-2 --> Packet: c000_0000_</br>0.333333333333 --> Packet: 3eaa_aaaa_</br>25 --> Packet: 41c8_0000_</br>
\ No newline at end of file
+Endianing off <hr>
+0 --> Packet: 0000_0000_<br>
+1 --> Packet: 0000_3f80_<br>
+-2 --> Packet: 0000_c000_<br>
+0.333333333333 --> Packet: aaaa_3eaa_<br>
+25 --> Packet: 0000_41c8_<br>
+Endianing on <hr>
+0 --> Packet: 0000_0000_<br>
+1 --> Packet: 3f80_0000_<br>
+-2 --> Packet: c000_0000_<br>
+0.333333333333 --> Packet: 3eaa_aaaa_<br>
+25 --> Packet: 41c8_0000_<br>
\ No newline at end of file
diff --git a/tests/IecType/test.iecReal.php b/tests/IecType/test.iecReal.php
index 3ba5aad..f9ed82d 100644
--- a/tests/IecType/test.iecReal.php
+++ b/tests/IecType/test.iecReal.php
@@ -25,26 +25,26 @@ function printPacket($packet){
     if($i % 2)
       $str .= "_";
   }
-  $str .= "</br>";
+  $str .= "<br>\n";
   return $str;
 }
 
-echo "Endianing off <hr>";
+echo "Endianing off <hr>\n";
 // Print mixed values
 for($i=0;$i<count($data);$i++) {
   echo $data[$i] . " --> ";
   $v = IecType::iecREAL($data[$i], 0);
   echo printPacket($v);
-  "<br>";
+  "<br>\n";
 }
 
-echo "Endianing on <hr>";
+echo "Endianing on <hr>\n";
 // Print mixed values
 for($i=0;$i<count($data);$i++) {
   echo $data[$i] . " --> ";
   $v = IecType::iecREAL($data[$i], 1);
   echo printPacket($v);
-  "<br>";
+  "<br>\n";
 }
  
 ?>
\ No newline at end of file
diff --git a/tests/ModbusMasterUdp/ref/test.fc16fc3bind.php.html b/tests/ModbusMasterUdp/ref/test.fc16fc3bind.php.html
new file mode 100644
index 0000000..00dd046
--- /dev/null
+++ b/tests/ModbusMasterUdp/ref/test.fc16fc3bind.php.html
@@ -0,0 +1,72 @@
+Array
+(
+    [0] => 0
+    [1] => 0
+    [2] => 0
+    [3] => 1
+    [4] => 0
+    [5] => 1
+    [6] => 0
+    [7] => 255
+    [8] => 0
+    [9] => 255
+)
+Array
+(
+    [0] => 0
+    [1] => 0
+    [2] => 0
+    [3] => 1
+    [4] => 255
+    [5] => 255
+    [6] => 127
+    [7] => 255
+    [8] => 128
+    [9] => 0
+)
+Array
+(
+    [0] => 0
+    [1] => 0
+    [2] => 0
+    [3] => 0
+    [4] => 0
+    [5] => 1
+    [6] => 0
+    [7] => 0
+    [8] => 255
+    [9] => 255
+    [10] => 255
+    [11] => 255
+    [12] => 255
+    [13] => 255
+    [14] => 127
+    [15] => 255
+    [16] => 0
+    [17] => 0
+    [18] => 128
+    [19] => 0
+)
+Array
+(
+    [0] => 0
+    [1] => 0
+    [2] => 0
+    [3] => 0
+    [4] => 0
+    [5] => 0
+    [6] => 63
+    [7] => 128
+    [8] => 0
+    [9] => 0
+    [10] => 192
+    [11] => 0
+    [12] => 170
+    [13] => 171
+    [14] => 62
+    [15] => 170
+    [16] => 0
+    [17] => 0
+    [18] => 65
+    [19] => 200
+)
diff --git a/tests/ModbusMasterUdp/ref/test.fc26bind.php.html b/tests/ModbusMasterUdp/ref/test.fc26bind.php.html
new file mode 100644
index 0000000..7991aa8
--- /dev/null
+++ b/tests/ModbusMasterUdp/ref/test.fc26bind.php.html
@@ -0,0 +1 @@
+writeMultipleRegister (FC26): DONE
\ No newline at end of file
diff --git a/tests/ModbusMasterUdp/test.fc15fc1.php b/tests/ModbusMasterUdp/test.fc15fc1.php
new file mode 100644
index 0000000..5274123
--- /dev/null
+++ b/tests/ModbusMasterUdp/test.fc15fc1.php
@@ -0,0 +1,22 @@
+<?php
+require_once dirname(__FILE__) . '/../../Phpmodbus/ModbusMasterUdp.php';
+require_once dirname(__FILE__) . '/../config.php';
+
+// Create Modbus object
+$modbus = new ModbusMasterUdp($testip);
+
+// Data to be writen - BOOL array
+$data = array(1, 0, TRUE, TRUE, 0, 1, TRUE, TRUE, 
+              1, 1, TRUE, TRUE, 0, 0, FALSE, FALSE,
+              0, 0, FALSE, FALSE, 1, 1, TRUE, TRUE,
+              1, 1, TRUE, TRUE, 1, 1, TRUE, TRUE);
+// Write data - FC 15
+$modbus->writeMultipleCoils(0, 12288, $data);
+echo $modbus->status;
+$modbus->status = "";
+echo "\n\n";
+// Read data - FC 1
+$recData = $modbus->readCoils(0, 12288, 32);
+echo $modbus->status;
+echo "\n\n";
+var_dump($recData);
\ No newline at end of file
diff --git a/tests/ModbusMasterUdp/test.fc16fc3bind.php b/tests/ModbusMasterUdp/test.fc16fc3bind.php
new file mode 100644
index 0000000..c38edb4
--- /dev/null
+++ b/tests/ModbusMasterUdp/test.fc16fc3bind.php
@@ -0,0 +1,45 @@
+<?php
+require_once dirname(__FILE__) . '/../../Phpmodbus/ModbusMasterUdp.php';
+require_once dirname(__FILE__) . '/../config.php';
+
+// Create Modbus object
+$modbus = new ModbusMasterUdp($testip);
+$modbus->client = "192.192.15.133";
+
+// Data to be writen - BYTE
+$data = array(0, 1, 1, pow(2,8)-1, pow(2,8)-1);
+$dataTypes = array("BYTE", "BYTE", "BYTE", "BYTE", "BYTE");
+// Write data - FC 16
+$modbus->writeMultipleRegister(0, 12288, $data, $dataTypes);
+// Read data - FC3
+$recData = $modbus->readMultipleRegisters(0, 12288, 5);
+print_r($recData);
+
+// Data to be writen - INT
+$data = array(0, 1, -1, pow(2,15)-1, -pow(2,15));
+$dataTypes = array("INT", "INT", "INT", "INT", "INT");
+// Write data - FC 16
+$modbus->writeMultipleRegister(0, 12288, $data, $dataTypes);
+// Read data - FC3
+$recData = $modbus->readMultipleRegisters(0, 12288, 5);
+print_r($recData);
+
+// Data to be writen - DINT
+$data = array(0, 1, -1, pow(2,31)-1, -pow(2,31));
+$dataTypes = array("DINT", "DINT", "DINT", "DINT", "DINT");
+// Write data - FC 16
+$modbus->writeMultipleRegister(0, 12288, $data, $dataTypes);
+// Read data - FC3
+$recData = $modbus->readMultipleRegisters(0, 12288, 10);
+print_r($recData);
+
+// Data to be writen - REAL
+$data = array(0, 1, -2, 1/3, 25);
+$dataTypes = array("REAL", "REAL", "REAL", "REAL", "REAL");
+// Write data - FC 16
+$modbus->writeMultipleRegister(0, 12288, $data, $dataTypes);
+// Read data - FC3
+$recData = $modbus->readMultipleRegisters(0, 12288, 10);
+print_r($recData);
+
+?>
\ No newline at end of file
diff --git a/tests/ModbusMasterUdp/test.fc26bind.php b/tests/ModbusMasterUdp/test.fc26bind.php
new file mode 100644
index 0000000..8043f59
--- /dev/null
+++ b/tests/ModbusMasterUdp/test.fc26bind.php
@@ -0,0 +1,25 @@
+<?php
+require_once dirname(__FILE__) . '/../../Phpmodbus/ModbusMasterUdp.php';
+require_once dirname(__FILE__) . '/../config.php';
+
+// Create Modbus object
+$modbus = new ModbusMasterUdp($testip);
+$modbus->client = "192.192.15.133";
+
+// Data to be writen
+$data = array(1000, 2000, 1.250, 1.250);
+$dataTypes = array("REAL", "REAL", "REAL", "REAL");
+
+// FC23
+$recData = $modbus->readWriteRegisters(0, 12288, 6, 12288, $data, $dataTypes);
+
+if(!$recData) {
+  // Print error information if any
+  echo "</br>Error:</br>" . $modbus->errstr . "</br>";
+  //
+  exit();
+}
+
+// Print status information
+echo "writeMultipleRegister (FC26): DONE";
+?>
\ No newline at end of file
diff --git a/tutorials/Phpmodbus/Phpmodbus.pkg b/tutorials/Phpmodbus/Phpmodbus.pkg
index 91b4e47..a1c5c09 100644
--- a/tutorials/Phpmodbus/Phpmodbus.pkg
+++ b/tutorials/Phpmodbus/Phpmodbus.pkg
@@ -21,7 +21,9 @@
   <para>
    The library implements:
    <itemizedlist>
+     <listitem><para>FC  1: read multiple coils</para></listitem>
      <listitem><para>FC  3: read multiple registers</para></listitem>
+     <listitem><para>FC 15: write multiple coils</para></listitem>
      <listitem><para>FC 16: write multiple registers</para></listitem>
      <listitem><para>FC 23: read write registers</para></listitem>
     </itemizedlist>
@@ -44,25 +46,40 @@
    Copy the Phpmodbus library to your PHP project folder.
   </para>
   <para>
-   Create a PHP script and assign the library using
-     <programlisting role="ini">
-      <![CDATA[ require_once dirname(__FILE__) . '/Phpmodbus/ModbusMasterUdp.php'; ]]>
+   Create a PHP script and assign the library using require_once() command
+     <programlisting role="c">
+      <![CDATA[require_once dirname(__FILE__) . '/Phpmodbus/ModbusMasterUdp.php'; ]]>
      </programlisting>
   </para>
   <para>
-    To create the Modbus master object, that will communicate with a Modbus slave
-    at IP address 192.168.1.1, write
-    <programlisting role="ini">
+    To create the Modbus master object communicating to the 192.168.1.1 modbus slave 
+    at IP address 192.168.1.1 write
+    <programlisting role="c" linenumbering="numbered" startinglinenumber="2">
       <![CDATA[ $modbus = new ModbusMasterUdp("192.168.1.1"); ]]>
-     </programlisting>
+    </programlisting>
   </para>
   <para>
-    To read 5 words (10 bytes) located at the memory beginning at address = 12288 of
-    the devide with Modbus ID=0 use
-    <programlisting role="ini">
-      <![CDATA[ $recData = $modbus->readMultipleRegisters(0, 12288, 5); ]]>
+    To read 5 words (10 bytes) from the device ID=0 and its memory address 12288
+    use try-catch method call
+    <programlisting role="c" linenumbering="numbered" startinglinenumber="3">
+      <![CDATA[try {
+    // Function processing
+    $recData = $modbus->readMultipleRegisters(0, 12288, 5); 
+}
+catch (Exception $e) {
+    // Exception processing, e.g. print error information
+    echo $modbus;
+    echo $e;
+    exit; 
+}]]>
      </programlisting>
   </para>
+  <para>
+    To process the function byte stream, use conversion to PHP types in 
+  </para>
+  <programlisting role="c" linenumbering="numbered" startinglinenumber="15">
+      <![CDATA[echo PhpType::bytes2string($recData); ]]>
+     </programlisting>
   <para>
   For other examples see sections bellow.
   </para>
@@ -72,6 +89,15 @@
   <para>
     This section presents library features and examples
   </para>
+    <refsect2 id="{@id example_fc1}">
+    <title>FC1 - read mutliple coils</title>
+    <para>
+      FC1 functionality example
+    </para>
+    <para>
+    {@example example_fc1.php}
+    </para>
+  </refsect2>
   <refsect2 id="{@id example_fc3}">
     <title>FC3 - read mutliple registers</title>
     <para>
@@ -81,6 +107,15 @@
     {@example example_fc3.php}
     </para>
   </refsect2>
+  <refsect2 id="{@id example_fc15}">
+    <title>FC15 - write mutliple coils</title>
+    <para>
+      FC15 functionality example
+    </para>
+    <para>
+    {@example example_fc15.php}
+    </para>
+  </refsect2>
   <refsect2 id="{@id example_fc16}">
     <title>FC16 - write mutliple registers</title>
     <para>