Development of motion control software function library for electromechanical equipment

： A motion control function library comprises a set of standard functional blocks integrated in a programmable integrated environment， which is vital to the rapid development of reconfigurable PAC sys• tems.To solve the problems associated with the rapid development of functional blocks and the standard• ized development of control systems， the development methods and key technologies of functional blocks are investigated in this study； In addition， a motion control function library architecture based on the PLC open specification and its rapid development method are proposed.First， the servo control principle of