在设备中，有的出料传送带需要设计成来料时启动，来料终止后过几秒停止。梯形图如下：


                                  X15                                                     T10                                                                                            Y16
----------------------------▏     ▏------------------------------------------▏ /    ▏-------------------------------------------------------------------------（          ）
                               来料时ON      ▏                                    无料计时                                                                                    传送带启动
                                                     ▏
                     Y16                         ▏                       X15                                                                                                                           K50
-----------------▏      ▏--------------------------------------▏  /   ▏----------------------------------------------------------------------------------------（ T10     ）
                传送带启动自锁                                  无料时闭合                                                                                                   无料计时


                                    传送带可由受Y16控制的变频器驱动。以上，仅供参考。