diff --git a/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/LjPlanning/LjPlanningPlcHelp.cs b/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/LjPlanning/LjPlanningPlcHelp.cs
index 7ef77d8..cdfb233 100644
--- a/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/LjPlanning/LjPlanningPlcHelp.cs
+++ b/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/LjPlanning/LjPlanningPlcHelp.cs
@@ -545,7 +545,7 @@ namespace Mesnac.Action.ChemicalWeighing.LjPlanning
                 List<Step> lsSteps = new List<Step>();
                 for (int i = 0; i < 10; i++)
                 {
-                    var bytes = data.Skip(i * 10).Take(12).ToArray();
+                    var bytes = data.Skip(i * 12).Take(12).ToArray();
                     Step step = new Step()
                     {
                         MixCode = byteTransform.TransInt16(bytes, 0),
@@ -582,7 +582,7 @@ namespace Mesnac.Action.ChemicalWeighing.LjPlanning
 
                 for (int i = 0; i < 10; i++)
                 {
-                    var bytes = data.Skip(i * 10).Take(20).ToArray();
+                    var bytes = data.Skip(i * 20).Take(20).ToArray();
                     MixStep step = new MixStep()
                     {