It is realized by Siemens s7-200: after the detector at the entrance of the hotel detects someone, it delays opening the door for 0.5 seconds and closes it for 2 seconds after detecting no one (ladder

It is realized by Siemens s7-200: after the detector at the entrance of the hotel detects someone, it delays opening the door for 0.5 seconds and closes it for 2 seconds after detecting no one (ladder diagram). Visually, these are two learning topics. You can consult the teacher well. This is a very basic training topic. If it is an actual control topic, your description is very imperfect, such as whether to open the door with a motor or a cylinder, and whether there is a switch threshold.

It is recommended to have a good look at the usage chapter of timer and study hard.