diff --git a/app/services/modbus/polling_service.rb b/app/services/modbus/polling_service.rb
index 79f153d..310c513 100644
--- a/app/services/modbus/polling_service.rb
+++ b/app/services/modbus/polling_service.rb
@@ -29,16 +29,17 @@ module Modbus
           begin
             now = Time.now
             current = [ now.hour, now.min ]
+            current_time = format("%02d:%02d", current[0], current[1])
+            puts "# current time: #{current_time}.#{now.sec}"
             if current != last_logged
-              puts "시간 변경 감지됨: #{format('%02d:%02d', current[0], current[1])}"
+              puts "시간 변경 감지됨: #{current_time}"
               schedule = Schedule.find_by(hour: current[0], minute: current[1])
               apply_schedule(schedule) if schedule
               last_logged = current
             end
+            sleep 1
           rescue => e
             puts  "[#{Time.current}] #{file} 에러: #{e.message}"
-          ensure
-            sleep 1
           end
         end
       end
diff --git a/app/views/partials/modals/_add_schedule.html.erb b/app/views/partials/modals/_add_schedule.html.erb
index 828d52f..7e7b284 100644
--- a/app/views/partials/modals/_add_schedule.html.erb
+++ b/app/views/partials/modals/_add_schedule.html.erb
@@ -36,4 +36,4 @@
   <div class="flex p-4">
     <%= submit_tag "추가", class: "btn bg-primary" %>
   </div>
-<% end %>
\ No newline at end of file
+<% end %>