diff --git a/src/api/iot/thingmodel/index.ts b/src/api/iot/thingmodel/index.ts
index 3b93c38c1..63b17a605 100644
--- a/src/api/iot/thingmodel/index.ts
+++ b/src/api/iot/thingmodel/index.ts
@@ -213,7 +213,13 @@ export const ThingModelApi = {
   },
 
   // 计算 Modbus 命令（用于前端自动生成）
-  calculateModbusCommand: async (data: { productId: number; registerAddress: number; functionCode?: number }) => {
+  calculateModbusCommand: async (data: { 
+    productId: number; 
+    registerAddress: number; 
+    functionCode?: number;
+    registerCount?: number;
+    byteOrder?: number;
+  }) => {
     return await request.post({ url: `/iot/thing-model/calculate-modbus-command`, data })
   }
 }
diff --git a/src/views/iot/thingmodel/ThingModelProperty.vue b/src/views/iot/thingmodel/ThingModelProperty.vue
index 1a33262a4..6fd9b5156 100644
--- a/src/views/iot/thingmodel/ThingModelProperty.vue
+++ b/src/views/iot/thingmodel/ThingModelProperty.vue
@@ -317,7 +317,9 @@ const handleRegisterAddressChange = async (registerAddress: number | undefined)
     const { data } = await ThingModelApi.calculateModbusCommand({
       productId: product.value.id,
       registerAddress: registerAddress,
-      functionCode: property.value.modbusConfig?.functionCode || 3
+      functionCode: property.value.modbusConfig?.functionCode || 3,
+      registerCount: property.value.modbusConfig?.registerCount || 1,
+      byteOrder: property.value.modbusConfig?.byteOrder || 2  // 默认小端模式
     })
 
     // 更新表单数据