Added Kaco cyclic data exchange change

- Power will now only be written if the requested power changed

PLC/POUs/Sunspec/Kaco/FB_PowerSupplyKaco.TcPOU

@@ -47,6 +47,7 @@ VAR
 	
 	// Internal power command
 	_rPowerInternal : REAL := 0;
+	_rLastPowerInternal : REAL := 0;
 	
 	// Enum for requested state
 	_eRequestedState : E_KACO_PCU_REQUESTED_STATE := E_KACO_PCU_REQUESTED_STATE.OFF;
@@ -466,7 +467,7 @@ CASE _iStateCyclicData OF
 			IF _eRequestedState <> _eLastRequestedState THEN
 				_iStateCyclicData := 10;
 			ELSE
-				_iStateCyclicData := 20;
+				_iStateCyclicData := 12;
 			END_IF
 		END_IF
 	
@@ -500,7 +501,14 @@ CASE _iStateCyclicData OF
 		_tonPollingTimer(IN := TRUE, PT := _timPollingDelay);
 		IF _tonPollingTimer.Q THEN
 			_tonPollingTimer(IN := FALSE);
+			_iStateCyclicData := 12;
+		END_IF
+		
+	12: // Check if powercommand changed
+		IF _rPowerInternal <> _rLastPowerInternal THEN
 			_iStateCyclicData := 20;
+		ELSE
+			_iStateCyclicData := 21;
 		END_IF
 		
 	20: // Write current power command
@@ -526,6 +534,7 @@ CASE _iStateCyclicData OF
 				_iErrorCountWPC := _iErrorCountWPC + 1;
 				_iErrorIDWPC := _fbWritePowerCommand.nErrId;
 			ELSE
+				_rLastPowerInternal := _rPowerInternal;
 				_iCurrentErrorCountWPC := 0;
 			END_IF
 		END_IF