Application of the PROFIBUS-DP in the loading system of the automobile vacuum booster durability test

Aiming at the features of the durability test of vacuum booster, this paper designed a multi-channel pneumatic loading system based on PROFIBUS-DP. The IPC (industrial personal computer) works as a master station to monitor the slave stations via roll-call polling mode. SPC200 works as a slave station to complete the task of multi-axis pneumatic servo control. At this point, the system realized the networking and automation of the loading control by industrial bus control. The loading system, which has the properties of real time and high precision, has been successfully applied in the durability test and proved to be highly effective.