Added precharge mode

2025-06-04 19:37:25 +02:00
parent f12063e294
commit 38f44128d1
9 changed files with 451 additions and 277 deletions
--- a/PLC/DUTs/E_STRING_OPERATING_MODE.TcDUT
+++ b/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>
--- a/PLC/PLC.plcproj
+++ b/PLC/PLC.plcproj
@@ -57,6 +57,9 @@
    <Compile Include="DUTs\E_COMPONENT_STATUS.TcDUT">
      <SubType>Code</SubType>
    </Compile>
+    <Compile Include="DUTs\E_STRING_OPERATING_MODE.TcDUT">
+      <SubType>Code</SubType>
+    </Compile>
    <Compile Include="DUTs\Modbus\ErrorWarningRegisters\ST_DWORD_UNIT_ERROR_BITMAP.TcDUT">
      <SubType>Code</SubType>
    </Compile>
@@ -248,8 +251,8 @@
  <ProjectExtensions>
    <PlcProjectOptions>
      <XmlArchive>
-  <Data>
-    <o xml:space="preserve" t="OptionKey">
+        <Data>
+          <o xml:space="preserve" t="OptionKey">
      <v n="Name">"&lt;ProjectRoot&gt;"</v>
      <d n="SubKeys" t="Hashtable" ckt="String" cvt="OptionKey">
        <v>{192FAD59-8248-4824-A8DE-9177C94C195A}</v>
@@ -2631,16 +2634,16 @@
      </d>
      <d n="Values" t="Hashtable" />
    </o>
-  </Data>
-  <TypeList>
-    <Type n="Boolean">System.Boolean</Type>
-    <Type n="Hashtable">System.Collections.Hashtable</Type>
-    <Type n="Int32">System.Int32</Type>
-    <Type n="OptionKey">{54dd0eac-a6d8-46f2-8c27-2f43c7e49861}</Type>
-    <Type n="String">System.String</Type>
-    <Type n="UInt32">System.UInt32</Type>
-  </TypeList>
-</XmlArchive>
+        </Data>
+        <TypeList>
+          <Type n="Boolean">System.Boolean</Type>
+          <Type n="Hashtable">System.Collections.Hashtable</Type>
+          <Type n="Int32">System.Int32</Type>
+          <Type n="OptionKey">{54dd0eac-a6d8-46f2-8c27-2f43c7e49861}</Type>
+          <Type n="String">System.String</Type>
+          <Type n="UInt32">System.UInt32</Type>
+        </TypeList>
+      </XmlArchive>
    </PlcProjectOptions>
  </ProjectExtensions>
 </Project>
--- a/PLC/PLC.tmc
+++ b/PLC/PLC.tmc
--- a/PLC/POUs/FB_Module.TcPOU
+++ b/PLC/POUs/FB_Module.TcPOU
@@ -19,6 +19,9 @@ VAR_INPUT
 	// Module in safety check mode
 	xInSafetyCheckMode : BOOL;
 	
+	// String operation mode
+	eStringOperatingMode : E_STRING_OPERATING_MODE;
+	
 	// All safetyinterlocks are ok
 	xSafetyIntlksOk : BOOL;
 	
@@ -227,6 +230,7 @@ END_IF
 _fbUnit1(
 	xEnable := xEnable,
 	xStartBalancing := xStartBalancing,
+	eStringOperatingMode := eStringOperatingMode,
 	xInverterEnabled := xInverterEnabled,
 	xInSafetyCheckMode := xInSafetyCheckMode,
 	stUnitConfig:= GVL_CONFIG.stUnitConfig, 
@@ -266,6 +270,7 @@ END_IF
 _fbUnit2(
 	xEnable := xEnable,
 	xStartBalancing := xStartBalancing,
+	eStringOperatingMode := eStringOperatingMode,
 	xInverterEnabled := xInverterEnabled,
 	xInSafetyCheckMode := xInSafetyCheckMode,
 	stUnitConfig:= GVL_CONFIG.stUnitConfig, 
@@ -305,6 +310,7 @@ END_IF
 _fbUnit3(
 	xEnable := xEnable,
 	xStartBalancing := xStartBalancing,
+	eStringOperatingMode := eStringOperatingMode,
 	xInverterEnabled := xInverterEnabled,
 	xInSafetyCheckMode := xInSafetyCheckMode,
 	stUnitConfig:= GVL_CONFIG.stUnitConfig, 
@@ -344,6 +350,7 @@ END_IF
 _fbUnit4(
 	xEnable := xEnable,
 	xStartBalancing := xStartBalancing,
+	eStringOperatingMode := eStringOperatingMode,
 	xInverterEnabled := xInverterEnabled,
 	xInSafetyCheckMode := xInSafetyCheckMode,
 	stUnitConfig:= GVL_CONFIG.stUnitConfig, 
--- a/PLC/POUs/FB_String.TcPOU
+++ b/PLC/POUs/FB_String.TcPOU
@@ -18,6 +18,9 @@ VAR_INPUT
 	// String in safety check mode
 	xInSafetyCheckMode : BOOL;
 	
+	// Operating mode of string
+	eOperationMode : E_STRING_OPERATING_MODE;
+	
 	// Requested inverter power
 	rPowerInverter : REAL;

@@ -266,6 +269,7 @@ _fbModule1(
 	uiFirstUnitIndex := uiStringNumber * 12,
 	rCurrent := stHMIInterface.rCurrent,
 	xStartBalancing := _xStartBalancing,
+	eStringOperatingMode := eOperationMode,
 	xInverterEnabled := _fbInverter.xActive,
 	xInSafetyCheckMode := xInSafetyCheckMode,
 	xEmergencyStopOk:= xEmergencyStopOk,
@@ -286,6 +290,7 @@ _fbModule2(
 	uiFirstUnitIndex := uiStringNumber * 12 + 4,
 	rCurrent := stHMIInterface.rCurrent,
 	xStartBalancing := _xStartBalancing,
+	eStringOperatingMode := eOperationMode,
 	xInverterEnabled := _fbInverter.xActive,
 	xInSafetyCheckMode := xInSafetyCheckMode,
 	xEmergencyStopOk:= xEmergencyStopOk,
@@ -306,6 +311,7 @@ _fbModule3(
 	uiFirstUnitIndex := uiStringNumber * 12 + 8,
 	rCurrent := stHMIInterface.rCurrent,
 	xStartBalancing := _xStartBalancing,
+	eStringOperatingMode := eOperationMode,
 	xInverterEnabled := _fbInverter.xActive,
 	xInSafetyCheckMode := xInSafetyCheckMode,
 	xEmergencyStopOk:= xEmergencyStopOk,
@@ -399,22 +405,28 @@ HandleErrors();
 CASE _iState OF
 	0: // Idle
 		// Start in normal mode
-		IF xEnable AND (NOT xStartBalancing) AND xAllModulesInAutoMode AND xRepairSwitchOk AND (NOT _xErrorInternal) THEN
+		IF xEnable AND xAllModulesInAutoMode AND xRepairSwitchOk AND (NOT _xErrorInternal) THEN
 			_xEnable := TRUE;
-			//eStatus := E_COMPONENT_STATUS.STARTING;
-			IF xInSafetyCheckMode THEN
-				_iState := 1;
-			ELSE
-				_iState := 5;
-			END_IF
-		END_IF
-		
-		// Start in balancing mode
-		IF (NOT xEnable) AND xStartBalancing AND xAllModulesInAutoMode AND (NOT _xErrorInternal) THEN
-			_xStartBalancing := TRUE;
-			_xReleaseLimitErrorsInternal := FALSE;
-			//eStatus := E_COMPONENT_STATUS.STARTING;
-			_iState := 7;
+			
+			CASE eOperationMode OF
+				// Automatic mode (local or remote)
+				E_STRING_OPERATING_MODE.AUTOMATIC:
+					_iState := 5;
+					
+				// Balancing mode
+				E_STRING_OPERATING_MODE.BALANCING:
+					_xStartBalancing := TRUE;
+					_xReleaseLimitErrorsInternal := FALSE;
+					_iState := 7;
+					
+				// Safety check mode
+				E_STRING_OPERATING_MODE.SAFETY_CHECK:
+					_iState := 1;
+					
+				// Precharge mode
+				E_STRING_OPERATING_MODE.PRECHARGE:
+					_iState := 1;
+			END_CASE
 		END_IF
 		
 		IF _xErrorInternal THEN
@@ -442,16 +454,13 @@ CASE _iState OF
 	5: // Wait for all modules to be ready in normal mode
 		IF _xAllModulesReady AND _xBalanceOk THEN
 			xResetSafetyDCCB := TRUE;
-			IF (NOT xInSafetyCheckMode) THEN
-				_xReleaseLimitErrorsInternal := TRUE;
-			END_IF
+			_xReleaseLimitErrorsInternal := TRUE;
 			_tonResetPulseLength.IN := TRUE;
 			_iState := 10;
 		END_IF
 		
 		IF (NOT xEnable) THEN
 			_xEnable := FALSE;
-			//eStatus := E_COMPONENT_STATUS.OFF;
 			_iState := 0;
 		END_IF
 		
@@ -497,7 +506,6 @@ CASE _iState OF
 			_tonSafetyOkTimeout.IN := FALSE;
 			xResetSafetyDCCB := FALSE;
 			_xEnable := FALSE;
-			//eStatus := E_COMPONENT_STATUS.SHUTDOWN;
 			_iState := 40;
 		END_IF
 		
@@ -521,18 +529,32 @@ CASE _iState OF
 		IF (NOT xDCCBOpen) THEN
 			_xReleaseSafetyIntlkErrors := TRUE;
 			_tonErrorDCCBNotClosed.IN := FALSE;
-			_rPowerInverterInternal := rPowerInverter;
-			//_rPowerInverterInternal := 0.0;
-			IF xInSafetyCheckMode THEN
-				_rPowerInverterInternal := 0.0;
-				_xEnableInverter := TRUE;
-				// _iState := 29;
-				_iState := 21;
-				//eStatus := E_COMPONENT_STATUS.ON;
-			ELSE
-				_iState := 21;
-			END_IF
+			
+			CASE eOperationMode OF
+				E_STRING_OPERATING_MODE.AUTOMATIC:
+					_rPowerInverterInternal := rPowerInverter;
+					_xEnableInverter := TRUE;
+					_iState := 21;
+					
+				E_STRING_OPERATING_MODE.SAFETY_CHECK:
+					_rPowerInverterInternal := 0.0;
+					_xEnableInverter := TRUE;
+					_iState := 21;
+					
+				E_STRING_OPERATING_MODE.PRECHARGE:
+					_rPowerInverterInternal := 0.0;
+					_xEnableInverter := FALSE;
+					_iState := 29;
+					
+				// Balancing mode should never reach this point!
+				// Its just here for testing
+				E_STRING_OPERATING_MODE.BALANCING:
+					_rPowerInverterInternal := 0.0;
+					_xEnableInverter := FALSE;
+					_iState := 50;
+			END_CASE
 		END_IF
+		
 		IF _tonErrorDCCBNotClosed.Q THEN
 			_xEnable := FALSE;
 			xCloseDCCB := FALSE;
@@ -564,12 +586,12 @@ CASE _iState OF
 	22: // Wait for inverter to be ready
 		_tonInverterStartupTimeout(IN := TRUE);
 		IF _fbInverter.xActive AND (NOT _fbInverter.xError) THEN
-			IF xInSafetyCheckMode THEN
-				_iState := 29;
-			ELSE
-				_iState := 30;
-			END_IF
-			//eStatus := E_COMPONENT_STATUS.ON;
+			CASE eOperationMode OF
+				E_STRING_OPERATING_MODE.SAFETY_CHECK:
+					_iState := 29;
+				ELSE
+					_iState := 30;
+			END_CASE
 			xReady := TRUE;
 			_tonInverterStartupTimeout(IN := FALSE);
 		END_IF
@@ -578,7 +600,6 @@ CASE _iState OF
 			_xEnableInverter := FALSE;
 			_rPowerInverterInternal := 0.0;
 			_xEnable := FALSE;
-			//eStatus := E_COMPONENT_STATUS.SHUTDOWN;
 			_iState := 31;
 			_tonInverterStartupTimeout(IN := FALSE);
 		END_IF
@@ -603,7 +624,6 @@ CASE _iState OF
 		IF (NOT xEnable) THEN
 			_xEnable := FALSE;
 			_xReleaseLimitErrorsInternal := FALSE;
-			//eStatus := E_COMPONENT_STATUS.SHUTDOWN;
 			_iState := 31;
 		END_IF
 		
@@ -627,28 +647,16 @@ CASE _iState OF
 			_rPowerInverterInternal := rPowerInverter;
 		END_IF
 		
-		(*
-		IF _rPowerInverterInternal > 0.0 THEN
-			eStatus := E_COMPONENT_STATUS.DISCHARGING;
-		ELSIF _rPowerInverterInternal < 0.0 THEN
-			eStatus := E_COMPONENT_STATUS.CHARGING;
-		ELSE
-			eStatus := E_COMPONENT_STATUS.ON;
-		END_IF
-		*)
-		
 		// Shutdown
 		IF (NOT xEnable) THEN
 			_xEnable := FALSE;
 			_xReleaseLimitErrorsInternal := FALSE;
 			IF GVL_CONFIG.xShutdownDischargeWithInverter THEN
 				_rPowerInverterInternal := GVL_CONFIG.rAbsShutdownDischargePower;
-				//eStatus := E_COMPONENT_STATUS.SHUTDOWN;
 				_iState := 31;
 			ELSE
 				_rPowerInverterInternal := 0.0;
 				_xEnableInverter := FALSE;
-				//eStatus := E_COMPONENT_STATUS.SHUTDOWN;
 				_iState := 40;
 			END_IF
 			
--- a/PLC/POUs/FB_Unit.TcPOU
+++ b/PLC/POUs/FB_Unit.TcPOU
@@ -9,9 +9,6 @@ VAR_INPUT
 	// HMI interface
 	stHMIInterface : REFERENCE TO ST_UNIT_HMI_INTERFACE;
 	
-	// Components shortage workaround
-	// xVoltageSensorIs1500V : BOOL;
-	
 	// Start unit
 	xEnable : BOOL;
 	
@@ -21,6 +18,9 @@ VAR_INPUT
 	// Unit in safety check mode
 	xInSafetyCheckMode : BOOL;
 	
+	// String operation mode
+	eStringOperatingMode : E_STRING_OPERATING_MODE;
+	
 	// Emergency stop ok
 	xEmergencyStopOk : BOOL;
 	
@@ -1027,7 +1027,32 @@ CASE _iState OF
 	31: // Check if voltage limit can be reached
 		_tonVoltageCheckTimeput(IN := TRUE);
 		
+		IF (NOT _xErrorActive) AND (NOT _xWarningActive) THEN
+			CASE eStringOperatingMode OF
+				E_STRING_OPERATING_MODE.SAFETY_CHECK:
+					_xEnableVoltageLimitChecks := TRUE;
+					_tonVoltageCheckTimeput(IN := FALSE);
+					xReady := TRUE;
+					stHMIInterface.eStatus := E_COMPONENT_STATUS.ON;
+					_iState := 35;
+					
+				E_STRING_OPERATING_MODE.PRECHARGE:
+					_tonVoltageCheckTimeput(IN := FALSE);
+					_xEnableVoltageLimitChecks := FALSE;
+					xReady := TRUE;
+					stHMIInterface.eStatus := E_COMPONENT_STATUS.ON;
+					_iState := 35;
+					
+				ELSE
+					IF (_fbVoltageSegment.rScaledValue >= GVL_CONFIG.rMinimumUnitVoltage) THEN
+						_xEnableVoltageLimitChecks := TRUE;
+						xReady := TRUE;
+						_iState := 35;
+					END_IF
+			END_CASE
+		END_IF
 		// Check for minimum unit voltage
+		(*
 		IF ((_fbVoltageSegment.rScaledValue >= GVL_CONFIG.rMinimumUnitVoltage) OR xInSafetyCheckMode) AND (NOT _xErrorActive) AND (NOT _xWarningActive) THEN
 			_tonVoltageCheckTimeput(IN := FALSE);
 			xReady := TRUE;
@@ -1042,9 +1067,10 @@ CASE _iState OF
 				stHMIInterface.eStatus := E_COMPONENT_STATUS.ON;
 				_iState := 35;
 			END_IF
-				
 		END_IF
+		*)
 		
+		// Voltage check timeout
 		IF _tonVoltageCheckTimeput.Q OR _xErrorActive THEN
 			_tonVoltageCheckTimeput(IN := FALSE);
 			xError := TRUE;
@@ -1260,8 +1286,6 @@ CASE _iState OF
 		_fbPosolytValveTankOutlet.ReqAutomaticClose();
 		_rSetpointNegolytPumpInlet := GVL_CONFIG.rPumpNegolytDisChrgPower;
 		_rSetpointPosolytPumpInlet := GVL_CONFIG.rPumpPosolytDisChrgPower;
-		//_fbPosolytPumpInlet.ReqAutomaticStop();
-		//_fbNegolytPumpInlet.ReqAutomaticStop();
 		_xEnableVoltageLimitChecks := FALSE;
 		xShutdownDischargeAllowed := FALSE;
 		xInShutdownDischargeMode := FALSE;
--- a/PLC/POUs/MAIN.TcPOU
+++ b/PLC/POUs/MAIN.TcPOU
@@ -28,10 +28,14 @@ VAR
 	_iState : INT;
 	_iStateSafetyCheck : INT;
 	_iStateBalancing : INT;
+	_iStatePrecharge : INT;
 	
 	// Start safety check mode
 	_xStartSafetyCheck : BOOL;
 	
+	// Start precharge mode
+	_xStartPrecharge : BOOL;
+	
 	// Auto remote and auto local power request
 	_rAutoPowerRequest : REAL;
 	
@@ -144,6 +148,8 @@ VAR
 	_xStringsBalancingDone : BOOL;
 	_xStringsInAutoMode : BOOL;
 	
+	_eStringOpMode : E_STRING_OPERATING_MODE;
+	
 	_rMaxCurrentInverterDCVoltage : REAL;
 	_rMinCurrentInverterDCVoltage : REAL;
 	
@@ -314,6 +320,7 @@ _tonStartupDelay(IN := TRUE);
 _afbStrings[0](
 	xEnable := _xEnableString AND GVL_CONFIG.axStringEnabled[0],
 	uiStringNumber := 0,
+	eOperationMode := _eStringOpMode,
 	xErrorShutdown := _xErrorShutdown,
 	xStartBalancing := _xStartBalancing,
 	sInverterIP := GVL_CONFIG.sInverterIpString1,
@@ -343,6 +350,7 @@ GVL_MODBUS.stBMSErrorReg.wBMSWarningActive.stBitmap.bSafetyIntlkString1 := (NOT
 _afbStrings[1](
 	xEnable := _xEnableString AND GVL_CONFIG.axStringEnabled[1],
 	uiStringNumber := 1,
+	eOperationMode := _eStringOpMode,
 	xErrorShutdown := _xErrorShutdown,
 	xStartBalancing := _xStartBalancing,
 	sInverterIP := GVL_CONFIG.sInverterIpString2,
@@ -549,6 +557,7 @@ GVL_MODBUS.stModbusEMSComm.stModbusReg11.rSetpointCosPhiMirror := GVL_MODBUS.stM
 // ===============================
 CASE _eBMSControlMode OF
 	E_BMS_CONTROL_MODE.AUTO_REMOTE:
+		_eStringOpMode := E_STRING_OPERATING_MODE.AUTOMATIC;
 		_xAllComponentsToManualMode := FALSE;
 		_xInSafetyCheckMode := FALSE;
 		_xReleaseManualMode := FALSE;
@@ -559,6 +568,7 @@ CASE _eBMSControlMode OF
 		SM_AUTO();
 		
 	E_BMS_CONTROL_MODE.AUTO_LOCAL:
+		_eStringOpMode := E_STRING_OPERATING_MODE.AUTOMATIC;
 		_xAllComponentsToManualMode := FALSE;
 		_xInSafetyCheckMode := FALSE;
 		_xReleaseManualMode := FALSE;
@@ -570,6 +580,7 @@ CASE _eBMSControlMode OF
 		SM_AUTO();
 		
 	E_BMS_CONTROL_MODE.MANUAL:
+		_eStringOpMode := E_STRING_OPERATING_MODE.AUTOMATIC;
 		_xAllComponentsToManualMode := TRUE;
 		_xInSafetyCheckMode := FALSE;
 		_xReleaseManualMode := TRUE;
@@ -580,6 +591,7 @@ CASE _eBMSControlMode OF
 		SM_MANUAL();
 		
 	E_BMS_CONTROL_MODE.SAFETY_CHECK:
+		_eStringOpMode := E_STRING_OPERATING_MODE.SAFETY_CHECK;
 		_xAllComponentsToManualMode := FALSE;
 		_xInSafetyCheckMode := TRUE;
 		_xReleaseManualMode := FALSE;
@@ -590,6 +602,7 @@ CASE _eBMSControlMode OF
 		SM_SAFETY_CHECK();
 		
 	E_BMS_CONTROL_MODE.CAPACITY_TEST:
+		_eStringOpMode := E_STRING_OPERATING_MODE.AUTOMATIC;
 		_xAllComponentsToManualMode := FALSE;
 		_xInSafetyCheckMode := FALSE;
 		_xReleaseManualMode := FALSE;
@@ -600,6 +613,7 @@ CASE _eBMSControlMode OF
 		SM_CAPACITY_TEST();
 		
 	E_BMS_CONTROL_MODE.BALANCING:
+		_eStringOpMode := E_STRING_OPERATING_MODE.BALANCING;
 		_xAllComponentsToManualMode := FALSE;
 		_xInSafetyCheckMode := FALSE;
 		_xReleaseManualMode := FALSE;
@@ -610,6 +624,7 @@ CASE _eBMSControlMode OF
 		SM_BALANCING();
 		
 	E_BMS_CONTROL_MODE.CYCLING:
+		_eStringOpMode := E_STRING_OPERATING_MODE.AUTOMATIC;
 		_xAllComponentsToManualMode := FALSE;
 		_xInSafetyCheckMode := FALSE;
 		_xReleaseManualMode := FALSE;
@@ -621,6 +636,17 @@ CASE _eBMSControlMode OF
 		END_IF
 		SM_AUTO();
 		GVL_SCADA.stAutomaticModeHMI.diSetpointAutomatic := REAL_TO_DINT(_rAutoPowerRequest);
+		
+	E_BMS_CONTROL_MODE.PRECHARGE:
+		_eStringOpMode := E_STRING_OPERATING_MODE.PRECHARGE;
+		_xAllComponentsToManualMode := FALSE;
+		_xInSafetyCheckMode := FALSE;
+		_xReleaseManualMode := FALSE;
+		GVL_MODBUS.stModbusEMSComm.stModbusReg11.eBatteryStatus := E_BATTERY_STATUS.MAINTENANCE;
+		IF (GVL_SCADA.eRequestedControlMode <> _eBMSControlMode) AND (GVL_SCADA.xCanChangeControlMode) THEN
+			_eBMSControlMode := GVL_SCADA.eRequestedControlMode;
+		END_IF
+		SM_PRECHARGE();
 END_CASE

 GVL_SCADA.xCanChangeControlMode := _xCanChangeMode;
@@ -1045,7 +1071,95 @@ END_CASE]]></ST>
    </Action>
    <Action Name="SM_PRECHARGE" Id="{b84aedc8-0039-40a2-8abe-a166eca7bebc}">
      <Implementation>
-        <ST><![CDATA[]]></ST>
+        <ST><![CDATA[// Start on start button pressed
+IF GVL_SCADA.stAutomaticModeHMI.stStartAutoButton.xRequest THEN
+	// Only start if everything is ok
+	IF _xStringsAllInAutomaticMode AND (NOT _xStringsErrorActive) THEN
+		_xStartPrecharge := TRUE;
+	END_IF
+END_IF
+
+// Sto pif stop button pressed
+IF GVL_SCADA.stAutomaticModeHMI.stStopAutoButton.xRequest THEN
+	_xStartPrecharge := FALSE;
+END_IF
+
+
+// State machine
+CASE _iStatePrecharge OF
+	0: // Idle
+		// Wait for start command
+		IF _xStartPrecharge AND _xStringsAllInAutomaticMode THEN
+			_xEnableString := TRUE;
+			_iStatePrecharge := 10;
+			_rPowerInverter := 0.0;
+			_xCanChangeMode := FALSE;
+		END_IF
+		
+	10: // Wait for string to be ready
+		IF _xStringsReady AND (NOT _xStringsErrorActive) THEN
+			_iStatePrecharge := 30;
+		END_IF
+		
+		// Shutdown
+		IF NOT _xStartPrecharge THEN
+			_xEnableString := FALSE;
+			_iStatePrecharge := 0;
+			_xCanChangeMode := TRUE;
+		END_IF
+		
+		// Check for errors
+		IF _xStringsErrorActive THEN
+			_iStatePrecharge := 1000;
+		END_IF
+		
+	30: // String enabled and dc circuit breaker closed
+		// Check if the battery should still be active
+		IF (NOT _xStartPrecharge) THEN
+			// Start string shutdown
+			_xEnableString := FALSE;
+			GVL_MODBUS.stModbusEMSComm.stModbusReg11.eChargeStatus := E_CHARGE_STATUS.UNDEFINED;
+			GVL_MODBUS.stModbusEMSComm.stModbusReg10.uiActiveParallelMembers := 0;
+			_iStatePrecharge := 45;
+			_xCanChangeMode := TRUE;
+		END_IF
+		
+		// Check for errors
+		IF _xStringsErrorActive THEN
+			_xEnableString := FALSE;
+			_iStatePrecharge := 1000;
+		END_IF
+		
+	45: // Wait for shutdown of string to be done
+		IF _xStringsOff THEN
+			_iStatePrecharge := 0;
+		END_IF
+		
+		IF _xStartPrecharge THEN
+			_iStatePrecharge := 0;
+		END_IF
+	
+		// Check for errors
+		IF _xStringsErrorActive THEN
+			_xEnableString := FALSE;
+			_iStatePrecharge := 1000;
+		END_IF
+		
+	1000: // Error state
+		_xEnableString := FALSE;
+		_rPowerInverter := 0.0;
+		_xCanChangeMode := TRUE;
+		_xStartPrecharge := FALSE;
+		_iStatePrecharge := 1010;
+		
+	1010: // Wait for reset from error state
+		IF (NOT _xStringsErrorActive) AND (NOT _xStartPrecharge) THEN
+			// Goto init state
+			_iStatePrecharge := 0;
+			
+			_xCanChangeMode := TRUE;
+		END_IF
+END_CASE]]></ST>
      </Implementation>
    </Action>
    <Action Name="SM_SAFETY_CHECK" Id="{6d8e5993-cf32-4980-9ea3-c1fbfa4b8601}">
--- a/StringSafetyPLC/Multi
+++ b/StringSafetyPLC/Multi
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<MultiSetting Crc="3276432870" Version="1.2">
+<MultiSetting Crc="3644276170" Version="1.2">
  <ProjectData>
    <Id>1</Id>
    <TargetSystem>
@@ -154,6 +154,9 @@
      <SubType>EL2912</SubType>
      <ObjectId>50462856</ObjectId>
      <SafeAddress>28</SafeAddress>
+      <Customizing>
+        <Group Id="87605930-f4c2-4c12-816d-f0103cb2103d" Value="2" />
+      </Customizing>
    </TargetSystem>
    <SafetyAliasDevice>
      <SdsId>36</SdsId>
--- a/Uniper.tsproj
+++ b/Uniper.tsproj
@@ -269,7 +269,7 @@
 		</System>
 		<Plc>
 			<Project GUID="{9AE64910-5EB2-4866-93FD-EFE059C38C36}" Name="PLC" PrjFilePath="PLC\PLC.plcproj" TmcFilePath="PLC\PLC.tmc" ReloadTmc="true" AmsPort="851" FileArchiveSettings="#x000e" CopyTmcToTarget="true" CopyTpyToTarget="false" SymbolicMapping="true">
-				<Instance Id="#x08502000" TcSmClass="TComPlcObjDef" KeepUnrestoredLinks="2" TmcHash="{0016C578-B572-1C3C-7D3E-E67B9CAFCEBF}" TmcPath="PLC\PLC.tmc">
+				<Instance Id="#x08502000" TcSmClass="TComPlcObjDef" KeepUnrestoredLinks="2" TmcHash="{6897FEAD-F22A-6122-B58E-0696201C9577}" TmcPath="PLC\PLC.tmc">
 					<Name>PLC Instance</Name>
 					<CLSID ClassFactory="TcPlc30">{08500001-0000-0000-F000-000000000064}</CLSID>
 					<Vars VarGrpType="2" AreaNo="1">