diff --git a/AMESCoreStudio.Web/Views/PCS/PCS001N.cshtml b/AMESCoreStudio.Web/Views/PCS/PCS001N.cshtml
index 69cf4173..fab1f2ff 100644
--- a/AMESCoreStudio.Web/Views/PCS/PCS001N.cshtml
+++ b/AMESCoreStudio.Web/Views/PCS/PCS001N.cshtml
@@ -41,7 +41,7 @@
                     </div>
                     <label asp-for="wipAtt.ItemNO" class="layui-form-label"></label>
                     <div class="layui-input-inline">
-                        <input asp-for="wipAtt.ItemNO" style="width: 150px; display:initial" oninput="let p=this.selectionStart;this.value=this.value.toUpperCase();this.setSelectionRange(p, p);" class="layui-input" autocomplete="off" />
+                        <input asp-for="wipAtt.ItemNO" style="width: 150px; display:initial" oninput="let p=this.selectionStart;this.value=this.value.toUpperCase();this.setSelectionRange(p, p);" maxlength="20" class="layui-input" autocomplete="off" />
                         <button id="ItemNo" class="layui-btn layui-btn-sm layui-btn-normal" style="padding: 0 5px;" name="action" value="ItemNo" lay-submit lay-filter="querysubmit" title="刷新">
                             <i class="layui-icon layui-icon-sm">&#xe669;</i>
                         </button>
@@ -158,7 +158,7 @@
                             <div class="layui-inline">
                                 <label asp-for="wipAtt.ModelNO" class="layui-form-label"></label>
                                 <div class="layui-input-inline">
-                                    <input asp-for="wipAtt.ModelNO" class="layui-input" />
+                                    <input asp-for="wipAtt.ModelNO" class="layui-input" maxlength="30"/>
                                 </div>
                                 <label asp-for="wipAtt.WipProcess" class="layui-form-label"></label>
                                 <div class="layui-input-inline">
@@ -189,11 +189,11 @@
                             <div class="layui-inline">
                                 <label asp-for="wipAtt.ECN" class="layui-form-label"></label>
                                 <div class="layui-input-inline">
-                                    <input asp-for="wipAtt.ECN" class="layui-input" />
+                                    <input asp-for="wipAtt.ECN" class="layui-input" maxlength="20"/>
                                 </div>
                                 <label asp-for="wipAtt.EAN" class="layui-form-label"></label>
                                 <div class="layui-input-inline">
-                                    <input asp-for="wipAtt.EAN" class="layui-input" />
+                                    <input asp-for="wipAtt.EAN" class="layui-input" maxlength="20"/>
                                 </div>
                             </div>
                         </div>