EMS communication and Voltage optimizations

- Added data for EMS communication
- Added highest segment voltage for charging check
- Added lowest segment voltage for discharging check

PLC/PLC.plcproj

@@ -127,6 +127,10 @@
       <DefaultResolution>BaseLib, * (cmblu)</DefaultResolution>
       <Namespace>BaseLib</Namespace>
     </PlaceholderReference>
+    <PlaceholderReference Include="Tc2_ModbusRTU">
+      <DefaultResolution>Tc2_ModbusRTU, * (Beckhoff Automation GmbH)</DefaultResolution>
+      <Namespace>Tc2_ModbusRTU</Namespace>
+    </PlaceholderReference>
     <PlaceholderReference Include="Tc2_ModbusSrv">
       <DefaultResolution>Tc2_ModbusSrv, * (Beckhoff Automation GmbH)</DefaultResolution>
       <Namespace>Tc2_ModbusSrv</Namespace>