Added precharge mode

PLC/DUTs/E_STRING_OPERATING_MODE.TcDUT

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TcPlcObject Version="1.1.0.1" ProductVersion="3.1.4026.12">
+  <DUT Name="E_STRING_OPERATING_MODE" Id="{d4bc8f87-c493-46b8-95d6-71556c8b0aab}">
+    <Declaration><![CDATA[{attribute 'qualified_only'}
+{attribute 'strict'}
+{attribute 'to_string'}
+TYPE E_STRING_OPERATING_MODE :
+(
+	AUTOMATIC := 0,
+	SAFETY_CHECK := 1,
+	PRECHARGE := 2,
+	BALANCING := 3
+);
+END_TYPE
+]]></Declaration>
+  </DUT>
+</TcPlcObject>