title: Get String value of a Enum in Twincat 3
body: <p>In Twincat 3 I have a Enum like this:</p>
  <pre><code>TYPE ENUM_FUNCTIONS :
  (
  EMPTY                       :=0,    
  MOTOR_SPEED_INPUT_1         :=1,
  MOTOR_SPEED_INPUT_2         :=2,
  MAIN_SHAFT_SPEED_MONITOR_3  :=3,
  MAIN_SHAFT_SPEED_MONITOR_1  :=4,
  MAIN_SHAFT_SPEED_MONITOR_2  :=5
  );
  END_TYPE
  </code></pre>
  <p>Is there any way to get the String value of the Enum??</p>
  <p>For example, use <strong>ENUM_FUNCTIONS[5]</strong> and get the value <strong>MAIN_SHAFT_SPEED_MONITOR_2</strong></p>