logger 적용

app/services/modbus/polling_service.rb

@@ -51,8 +51,11 @@ module Modbus
         path = Rails.root.join(file)
         if system("ruby", path.to_s, arg)
           puts success_msg
+          Rails.logger.info success_msg
         else
-          puts "[#{Time.now}] #{file} 실행 실패 (args: #{arg})"
+          error_message = "[#{Time.now}] #{file} 실행 실패 (args: #{arg})"
+          puts error_message
+          Rails.logger.error error_message
         end
       end
     end