Added missing raw byte array writing reading

- added ability to change run/prog mode

MewtocolNet/Mewtocol/PLCEnums/OPMode.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace MewtocolNet {
+
+    /// <summary>
+    /// CPU type of the PLC
+    /// </summary>
+    public enum OPMode {
+        /// <summary>
+        /// PLC run mode
+        /// </summary>
+        Run,
+        /// <summary>
+        /// PLC programming mode
+        /// </summary>
+        Prog,
+    }
+
+}