diff --git a/endpoint.py b/endpoint.py
index 9ddf520..c77b14c 100644
--- a/endpoint.py
+++ b/endpoint.py
@@ -179,41 +179,38 @@ class Endpoint(Thread):
             last_row = None
 
         while True:
-            # время следующего опроса
-            need_time = last_query + scan_rate
+            try:
+                row = self.__mb_read_all_regs()
 
-            while True:
-                try:
-                    row = self.__mb_read_all_regs()
-
-                    if self.log_type == LOG_TYPE_ON_SCAN:
+                if self.log_type == LOG_TYPE_ON_SCAN:
+                    self.__insert_db_row(row)
+                    last_row = row
+                else:
+                    equal = True
+                    if last_row is None:
+                        equal = False
+                    else:
+                        for i in range(0, len(last_row)):
+                            if last_row[i] != row[i]:
+                                equal = False
+                                break
+                    if not equal:
                         self.__insert_db_row(row)
                         last_row = row
-                    else:
-                        equal = True
-                        if last_row is None:
-                            equal = False
-                        else:
-                            for i in range(0, len(last_row)):
-                                if last_row[i] != row[i]:
-                                    equal = False
-                                    break
-                        if not equal:
-                            self.__insert_db_row(row)
-                            last_row = row
-
-                    last_query = need_time
-                    break
-                except Exception as ex:
-                    journal.log(f"Exception: {ex}")
-                    time.sleep(1)  # небольшая задержка, чтоб не спамить запросами
-                    need_time = datetime.now() + scan_rate
+                break
+            except Exception as ex:
+                journal.log(f"Exception: {ex}")
 
             # вычислим время до следующего опроса и подождем
+            # время следующего опроса
+            need_time = last_query + scan_rate
             curr_time = datetime.now()
             if need_time > curr_time:
                 delta = need_time - curr_time
                 time.sleep(delta.seconds + (delta.microseconds / 1000000))
+                last_query = need_time
+            else:
+                last_query = datetime.now()
 
     def run(self):
         # запускаем клиента модбас