diff --git a/DLPilot/src/app_gui.py b/DLPilot/src/app_gui.py
index 3a67935..7145ca3 100644
--- a/DLPilot/src/app_gui.py
+++ b/DLPilot/src/app_gui.py
@@ -878,7 +878,17 @@ class App(ctk.CTk):
         self._pd_timer = self.after(3000, lambda: self._pd_step_done(False, '超时'))
 
     def _pd_on_reply(self, line):
-        self._pd_step_done(line.startswith('← ok'), line)
+        self._pd_step_done(self._pd_reply_ok(line), line)
+
+    @staticmethod
+    def _pd_reply_ok(line):
+        """应答行 -> 是否成功帧(TYPE=0xF0): 成功行正文是 payload 原文(如 'PD'/'okTL:246',
+        不必有 ok 前缀), 失败行正文是 TYPE 译码词或带 err:, 据此区分"""
+        body = line[2:].split('  [')[0].strip()
+        if 'err:' in body:
+            return False
+        return not any(n in body for n in dlpc_rs485.TYPE_NAMES.values()
+                       if n != '成功')   # '成功' 不会出现在日志正文, 仅防 payload 撞词
 
     def _pd_step_done(self, ok, line=''):
         if not self._pd_seq:
@@ -889,8 +899,9 @@ class App(ctk.CTk):
         _cmd, kind = self._pd_seq.pop(0)
         payload = ''
         if ok:
-            payload = line[2:].split('  [')[0].strip()     # 去 '← ' 与尾部 hex
-            payload = payload[2:].strip() if payload[:2].lower() == 'ok' else ''
+            body = line[2:].split('  [')[0].strip()        # 去 '← ' 与尾部 hex
+            payload = '' if body.lower() == 'ok' else \
+                (body[2:].strip() if body[:2].lower() == 'ok' else body)
         if kind == 'pd':
             self.chip_pd.configure(fg_color=CHIP_OK if ok else CHIP_ERR,
                                    text_color='#FFFFFF',