diff --git a/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/AutoControl/PlcAutoWriteHelper.cs b/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/AutoControl/PlcAutoWriteHelper.cs
index 48bab53..a0d5771 100644
--- a/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/AutoControl/PlcAutoWriteHelper.cs
+++ b/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/AutoControl/PlcAutoWriteHelper.cs
@@ -146,12 +146,12 @@ namespace Mesnac.Action.ChemicalWeighing.AutoControl
             };
             Step step7 = new Step()
             {
-                MixCode = 7,
+                MixCode = 5,
                 MixTime = GelWait
             };
             Step step8 = new Step()
             {
-                MixCode = 8,
+                MixCode = 7,
                 MixTime = GelCloseHeat,
                 MixTemp = GelDelayTime
             };