在設備中,有的出料傳送帶需要設計成來料時啟動,來料終止后過幾秒停止。梯形圖如下:
                                  X15                                                     T10                                                                                            Y16
----------------------------▏     ▏------------------------------------------▏ /    ▏-------------------------------------------------------------------------(          )
                               來料時ON      ▏                                    無料計時                                                                                    傳送帶啟動
                                                     ▏
                     Y16                         ▏                       X15                                                                                                                           K50
-----------------▏      ▏--------------------------------------▏  /   ▏----------------------------------------------------------------------------------------( T10     )
                傳送帶啟動自鎖                                  無料時閉合                                                                                                   無料計時
                                    傳送帶可由受Y16控制的變頻器驅動。以上,僅供參考。