Drive control commanding unit, a synchronous contol system for a plurality of drive control commanding units, and a synchronous control method for the units

摘要

A drive control commanding unit is provided which, when plural such units constitute a system, can configure the system as a synchronous system which can conduct a synchronous operation free from synchronism deviation. The drive control commanding unit has an operation clock generator 9 which generates an operation clock signal, an interruption generator 11 which outputs an interruption signal at every cycle of the operation clock signal. There also is a station number setting unit 13 through which a station number indicative whether the drive control commanding unit is operated as a master or as a slave is set; a synchronous timing signal transmitter 15 which operates only when the unit is used as the master, and which outputs a synchronous timing signal on the basis of the operation clock signal; a synchronous controller 18 which operates only when the unit is used as a slave, and which outputs a synchronous operation starting signal on the basis of an error state signal indicative of a ready state of a synchronous operation, and a synchronous timing signal received from the master drive control commanding unit. A synchronous checker 22 judges whether the operation of a slave drive control commanding unit is synchronized with that of the master drive control commanding unit or not, and an error signal generator 24 outputs an error signal based on the error state signal.