feat: 초기 프로젝트 구조 추가

plc/plc_client.py

@@ -0,0 +1,46 @@
+from pymelsec import Type3E
+
+
+class PLCClient:
+    def __init__(self):
+        self.plc = None
+        self._ip = ""
+        self._port = 5010
+        self._connected = False
+
+    def connect(self, ip: str, port: int = 5010) -> bool:
+        try:
+            self._ip = ip
+            self._port = port
+            self.plc = Type3E(host=ip, port=port, plc_type="Q")
+            self.plc.connect(ip, port)
+            self._connected = True
+            print(f"[PLC] 연결 성공: {ip}:{port}")
+            return True
+        except Exception as e:
+            print(f"[PLC] 연결 실패: {e}")
+            self._connected = False
+            self.plc = None
+            return False
+
+    def disconnect(self):
+        try:
+            if self.plc:
+                self.plc.close()
+            print("[PLC] 연결 해제")
+        except Exception as e:
+            print(f"[PLC] 연결 해제 오류: {e}")
+        finally:
+            self.plc = None
+            self._connected = False
+
+    def is_connected(self) -> bool:
+        return self._connected
+
+    def send_signal(self, signal: str, value=None):
+        """신호 전송 — 미구현"""
+        pass
+
+    def read_signal(self, address: str):
+        """신호 읽기 — 미구현"""
+        pass