Added FC22 Mask Write Register example

examples/example_fc22.php

@@ -0,0 +1,28 @@
+<?php
+
+require_once dirname(__FILE__) . '/../Phpmodbus/ModbusMaster.php';
+
+// Create Modbus object
+$modbus = new ModbusMaster("192.192.15.51", "UDP");
+
+// Data to be writen
+$bitValue = true;
+$bitNumber = 2;
+$andMask =  0xFFFF ^ pow(2, $bitNumber) ;
+$orMask =  0x0000 ^ (pow(2, $bitNumber) * $bitValue ) ;
+
+try {
+    // FC22
+    $modbus->maskWriteRegister(0, 12288, $andMask, $orMask);
+}
+catch (Exception $e) {
+    // Print error information if any
+    echo $modbus;
+    echo $e;
+    exit;
+}
+
+// Print status information
+echo $modbus;
+
+?>