网关V1，添加批量写

gateway/plc_manager.py

@@ -0,0 +1,42 @@
+from snap7_client import Snap7Client
+import logging
+
+class PLCManager:
+    """PLC连接管理器，管理多个PLC连接"""
+    
+    def __init__(self, plcs_config):
+        """
+        初始化PLC管理器
+        
+        Args:
+            plcs_config: PLC配置列表
+        """
+        self.plcs = {}
+        for plc_config in plcs_config:
+            name = plc_config["name"]
+            self.plcs[name] = Snap7Client(
+                plc_config["ip"],
+                plc_config["rack"],
+                plc_config["slot"]
+            )
+        self.logger = logging.getLogger("PLCManager")
+
+    def get_plc(self, name):
+        """获取指定名称的PLC客户端"""
+        return self.plcs.get(name)
+
+    def connect_all(self):
+        """连接所有配置的PLC"""
+        for name, client in self.plcs.items():
+            client.connect()
+    
+    def get_connection_status(self):
+        """获取所有PLC的连接状态"""
+        status = {}
+        for name, client in self.plcs.items():
+            status[name] = {
+                "ip": client.ip,
+                "connected": client.connected,
+                "retry_count": client.retry_count
+            }
+        return status