VxWorks-based PC centrally managed multi-level control system

VxWorks-based PC centrally manage multiple-level control system, belonging to the communication between multiple boards and a synchronous control. In order to solve the existing control system and the poor control of the communication problems between multiple boards aligner actual operation synchronized. Comprising comprising VxWorks-based PC, IPC, the VME bus, a master card Ci A, Ci B master card, the card C and the secondary master boards realizing the functions. Secondary master card C and communication command transmitted by the synchronization control VxWorks-based PC to the secondary master card A, secondary master card B,, secondary master card A, B, and secondary master cards are secondary master card C a communication control board and the respective synchronous, multi-level control. The present invention is a lithography machine in actual operation the communication between multiple boards and a synchronous control.