System for graphically setting transmission speed chain

The invention discloses a system for graphically setting a transmission speed chain, which belongs to the technical field of automation, and comprises a man-machine interface, a lower computer and a transmission subsection, the lower computer is connected with the man-machine interface through a communication bus, the lower computer is also connected with a transmission subsection driver through a field bus, and the transmission subsection driver is connected with the man-machine interface through a communication bus. The man-machine interface receives speed chain change and maintenance operation of an operator through the graphical interface, the change result is logically combined in the programmable logic controller, the programmable logic controller controls each driver through the generated result by the field bus, and the method is convenient and efficient to set the transmission speed chain, and is high in practicability. The operation can be completed only by performing digital input setting on the ma