fixed the examples

examples/example_fc6.php

@@ -1,26 +1,22 @@
 <?php
 
-require_once dirname(__FILE__) . '/../Phpmodbus/ModbusMaster.php';
+use PHPModbus\ModbusMaster;
 
 // Create Modbus object
 $modbus = new ModbusMaster("192.192.15.51", "UDP");
 
 // Data to be writen
 $data = array(-1000);
-$dataTypes = array("INT");
 
 try {
-    // FC6
-    $modbus->writeSingleRegister(0, 12288, $data, $dataTypes);
-}
-catch (Exception $e) {
-    // Print error information if any
-    echo $modbus;
-    echo $e;
-    exit;
+	// FC6
+	$modbus->writeSingleRegister(0, 12288, $data);
+} catch (Exception $e) {
+	// Print error information if any
+	echo $modbus;
+	echo $e;
+	exit;
 }
 
 // Print status information
 echo $modbus;
-
-?>