diff --git a/TFU002/TFU002.Logic/Services/GatewayService.cs b/TFU002/TFU002.Logic/Services/GatewayService.cs
index 871a15a..966353f 100644
--- a/TFU002/TFU002.Logic/Services/GatewayService.cs
+++ b/TFU002/TFU002.Logic/Services/GatewayService.cs
@@ -88,6 +88,12 @@ private GatewayVariable ConvertToGatewayVariale(ISymbol symbol)
                 Symbol = symbol,
                 TargetType = symbol.IsPrimitiveType ? ((DataType)symbol.DataType).ManagedType : null
             };
+            
+            if (((DataType) symbol.DataType).ManagedType == typeof(byte[]))
+            {
+                variable.TargetType = typeof(byte[]);
+            }
+            
             if (symbol.Attributes.Any(attribute => attribute.Name.Equals("S7.In", StringComparison.InvariantCultureIgnoreCase)))
             {
                 variable.Direction = Direction.Input;