diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 7036943..48130c0 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -60,6 +60,7 @@ dependencies {
     implementation(libs.androidx.activity)
     implementation(libs.androidx.constraintlayout)
     implementation(project(":lib_face"))
+    implementation(files("libs/plc_aar_104.aar"))
     testImplementation(libs.junit)
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)
diff --git a/app/libs/plc_aar_104.aar b/app/libs/plc_aar_104.aar
new file mode 100644
index 0000000..1c5eef6
Binary files /dev/null and b/app/libs/plc_aar_104.aar differ
diff --git a/app/src/main/java/com/sw/platecabinet/activity/LoginByFaceActivity.kt b/app/src/main/java/com/sw/platecabinet/activity/LoginByFaceActivity.kt
index bae86fd..bb7777a 100644
--- a/app/src/main/java/com/sw/platecabinet/activity/LoginByFaceActivity.kt
+++ b/app/src/main/java/com/sw/platecabinet/activity/LoginByFaceActivity.kt
@@ -57,6 +57,9 @@ import com.sw.platecabinet.utils.LogFileUtil
 import com.sw.platecabinet.utils.PlateUtils
 import com.sw.platecabinet.utils.RegisterCallbackHandler
 import com.sw.platecabinet.utils.SoundPoolUtil
+import com.sw.platecabinet.utils.mego.PlcCallback
+import com.sw.platecabinet.utils.mego.PlcHelper
+import com.sw.platecabinet.utils.mego.PlcStatus
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
@@ -386,39 +389,48 @@ class LoginByFaceActivity : BaseActivity<ActivityLoginFaceBinding>(),
     private var plateEnable = false
 
     /**
-     * 检测有无餐盘
-     */
-    private fun checkHasPlate(block: (Boolean) -> Unit) {
-        showWaitingDialog("检测餐盘中，请稍候……")
-        binding.root.postDelayed({
-            hideWaitingDialog()
-            block(true)
-        }, 1500)
-    }
-
-    /**
-     * 打开餐盘柜
+     * 打开餐盘柜：先获取 PLC 状态，有盘则出盘，无盘则播放提示音
      */
     private fun openPlate(userId: String?) {
         if (plateEnable.not()) return
         loadLogInfo("collectFace,openPlate: userId=$userId")
-        checkHasPlate { hasPlate ->
-            if (hasPlate.not()) {
-                //暂无餐盘，请联系管理人员
-                loadLogInfo("collectFace,openPlate: 暂无餐盘，请联系管理人员，isCollectFace=$isCollectFace")
+        showWaitingDialog("检测餐盘中，请稍候……")
+        PlcHelper.getInstance(this).getStatus(object : PlcCallback<PlcStatus> {
+            override fun onSuccess(result: PlcStatus) {
+                hideWaitingDialog()
+                if (result.isEmptyPlate) {
+                    // 无餐盘，播放提示音并返回首页
+                    loadLogInfo("collectFace,openPlate: 暂无餐盘，isEmptyPlate=true，isCollectFace=$isCollectFace")
+                    SoundPoolUtil.getInstance().play(NO_PLATE_REMIND, 0)
+                    goInitActivity()
+                    return
+                }
+                // 有餐盘，播放识别成功音效并调用出盘
+                loadLogInfo("collectFace,openPlate: 检测到餐盘，开始出盘")
+                SoundPoolUtil.getInstance().play(RECOGNIZE_SUCCESS, 0)
+                plateEnable = false
+                recognizeCountDownUtil.cancelCountDown()
+                PlcHelper.getInstance(this@LoginByFaceActivity).outPlate(object : PlcCallback<String> {
+                    override fun onSuccess(result: String) {
+                        loadLogInfo("collectFace,openPlate: 出盘成功，result=$result")
+                        goInitActivity()
+                    }
+
+                    override fun onError(message: String) {
+                        loadLogInfo("collectFace,openPlate: 出盘失败，message=$message")
+                        goInitActivity()
+                    }
+                })
+            }
+
+            override fun onError(message: String) {
+                hideWaitingDialog()
+                // 状态获取失败，保底播放无盘提示
+                loadLogInfo("collectFace,openPlate: 获取PLC状态失败，message=$message")
                 SoundPoolUtil.getInstance().play(NO_PLATE_REMIND, 0)
                 goInitActivity()
-                return@checkHasPlate
             }
-            //取餐盘
-            SoundPoolUtil.getInstance().play(RECOGNIZE_SUCCESS, 0)
-            //调用发盘方法
-            PlateUtils.open(this, "", false) {
-                goInitActivity()
-            }
-            plateEnable = false
-            recognizeCountDownUtil.cancelCountDown()
-        }
+        })
     }
 
     private val openDebouncer by lazy { Debouncer(5000) }
diff --git a/app/src/main/java/com/sw/platecabinet/utils/mego/PlcCallback.kt b/app/src/main/java/com/sw/platecabinet/utils/mego/PlcCallback.kt
new file mode 100644
index 0000000..099cb4e
--- /dev/null
+++ b/app/src/main/java/com/sw/platecabinet/utils/mego/PlcCallback.kt
@@ -0,0 +1,16 @@
+package com.sw.platecabinet.utils.mego
+
+/**
+ * PLC 操作统一回调接口
+ */
+interface PlcCallback<T> {
+    /**
+     * 操作成功回调（主线程）
+     */
+    fun onSuccess(result: T)
+
+    /**
+     * 操作失败回调（主线程）
+     */
+    fun onError(message: String)
+}
diff --git a/app/src/main/java/com/sw/platecabinet/utils/mego/PlcHelper.kt b/app/src/main/java/com/sw/platecabinet/utils/mego/PlcHelper.kt
new file mode 100644
index 0000000..8447fb1
--- /dev/null
+++ b/app/src/main/java/com/sw/platecabinet/utils/mego/PlcHelper.kt
@@ -0,0 +1,152 @@
+package com.sw.platecabinet.utils.mego
+
+import android.content.Context
+import android.os.Handler
+import android.os.Looper
+import com.megoai.plc_aar.SDK
+
+/**
+ * PLC 操作工具类（单例）
+ * 封装 SDK 所有接口，统一回调到主线程
+ */
+class PlcHelper private constructor(context: Context) {
+
+    private val sdk: SDK = SDK.getInstance(context)
+    private val mainHandler = Handler(Looper.getMainLooper())
+
+    companion object {
+        @Volatile
+        private var instance: PlcHelper? = null
+
+        /**
+         * 获取单例实例
+         */
+        fun getInstance(context: Context): PlcHelper {
+            return instance ?: synchronized(this) {
+                instance ?: PlcHelper(context.applicationContext).also { instance = it }
+            }
+        }
+    }
+
+    // ==================== 连接与模式 ====================
+
+    /**
+     * 打开出盘串口（应用启动时调用）
+     */
+    fun openSerialPort(callback: PlcCallback<String>) {
+        sdk.openPlcSerialPort { result ->
+            mainHandler.post { callback.onSuccess(result.toString()) }
+        }
+    }
+
+    /**
+     * 打开自动模式（应用启动时调用一次）
+     */
+    fun openAutoMode(callback: PlcCallback<String>) {
+        sdk.actionOpenAutoMode { result ->
+            mainHandler.post { callback.onSuccess(result.toString()) }
+        }
+    }
+
+    /**
+     * 故障复位（出现 alarmCode 或补盘完成后调用）
+     */
+    fun alarmReset(callback: PlcCallback<String>) {
+        sdk.actionAlarmReset { result ->
+            mainHandler.post { callback.onSuccess(result.toString()) }
+        }
+    }
+
+    // ==================== 出盘操作 ====================
+
+    /**
+     * 出盘
+     */
+    fun outPlate(callback: PlcCallback<String>) {
+        sdk.actionOutPlate { result ->
+            mainHandler.post { callback.onSuccess(result.toString()) }
+        }
+    }
+
+    // ==================== 平台控制 ====================
+
+    /**
+     * 平台下降（开始补盘）
+     */
+    fun platformDown(callback: PlcCallback<String>) {
+        sdk.actionPlatformDown { result ->
+            mainHandler.post { callback.onSuccess(result.toString()) }
+        }
+    }
+
+    /**
+     * 平台上升（补盘完成）
+     */
+    fun platformUp(callback: PlcCallback<String>) {
+        sdk.actionPlatformDownStop { result ->
+            mainHandler.post { callback.onSuccess(result.toString()) }
+        }
+    }
+
+    /**
+     * 补盘完成返回营业（自动模式 + 故障复位）
+     */
+    fun backToBusiness(callback: PlcCallback<String>) {
+        sdk.actionOpenAutoModeAndActionAlarmReset { result ->
+            mainHandler.post { callback.onSuccess(result.toString()) }
+        }
+    }
+
+    // ==================== 状态查询 ====================
+
+    /**
+     * 获取 PLC 状态（解析为 PlcStatus 对象）
+     */
+    fun getStatus(callback: PlcCallback<PlcStatus>) {
+        sdk.getPlcStatus { json ->
+            mainHandler.post {
+                if (json != null) {
+                    callback.onSuccess(PlcStatus.Companion.fromJson(json.toString()))
+                } else {
+                    callback.onError("获取状态失败")
+                }
+            }
+        }
+    }
+
+    /**
+     * 获取 PLC 状态（原始 JSON 字符串）
+     */
+    fun getStatusJson(callback: PlcCallback<String>) {
+        sdk.getPlcStatus { json ->
+            mainHandler.post {
+                if (json != null) callback.onSuccess(json.toString())
+                else callback.onError("获取状态失败")
+            }
+        }
+    }
+
+    // ==================== 参数设置 ====================
+
+    /**
+     * 设置 PLC 参数
+     * @param paramType 参数类型（如 "18FD" 表示主电机运行最长时间）
+     * @param paramValue 参数值（int，单位 0.1s）
+     */
+    fun setParams(paramType: String, paramValue: Int, callback: PlcCallback<String>) {
+        sdk.setPLCParams(
+            { result -> mainHandler.post { callback.onSuccess(result.toString()) } },
+            paramType,
+            paramValue
+        )
+    }
+
+    // ==================== 生命周期 ====================
+
+    /**
+     * 释放资源，清除单例
+     */
+    fun release() {
+        instance = null
+    }
+}
diff --git a/app/src/main/java/com/sw/platecabinet/utils/mego/PlcStatus.kt b/app/src/main/java/com/sw/platecabinet/utils/mego/PlcStatus.kt
new file mode 100644
index 0000000..96bdf15
--- /dev/null
+++ b/app/src/main/java/com/sw/platecabinet/utils/mego/PlcStatus.kt
@@ -0,0 +1,34 @@
+package com.sw.platecabinet.utils.mego
+
+import org.json.JSONObject
+
+/**
+ * PLC 状态数据类
+ */
+data class PlcStatus(
+    val isEmptyPlate: Boolean = false,        // 是否空盘
+    val isPlateformDown: Boolean = false,     // 平台是否在下位
+    val isPlateformUp: Boolean = false,       // 平台是否在上位
+    val isTakePlateInfrared: Boolean = false, // 取盘红外是否触发
+    val alarmCode: Int = 0                    // 报警代码
+) {
+    companion object {
+        /**
+         * 从 JSON 字符串解析状态
+         */
+        fun fromJson(json: String): PlcStatus {
+            return try {
+                val obj = JSONObject(json)
+                PlcStatus(
+                    isEmptyPlate = obj.optBoolean("isEmptyPlate", false),
+                    isPlateformDown = obj.optBoolean("isPlateformDown", false),
+                    isPlateformUp = obj.optBoolean("isPlateformUp", false),
+                    isTakePlateInfrared = obj.optBoolean("isTakePlateInfrared", false),
+                    alarmCode = obj.optInt("alarmCode", 0)
+                )
+            } catch (e: Exception) {
+                PlcStatus()
+            }
+        }
+    }
+}