| 摘要 |
PROBLEM TO BE SOLVED: To provide a numeral control system that enables an efficient usage of a communication band.SOLUTION: A numeral control device CNC transmits an instruction value to each amplifier performing a drive control of each motor and receives feedback from each amplifier, in which the instruction value and feedback mean an electric current, torque, velocity and position. To an amplifier A group, an amplifier 1 to an amplifier j belong, and to an amplifier B group, the amplifier 1 to an amplifier k belong. In a system in which the numeral control device CNC, the amplifier A group of the amplifier j and the amplifier B group of the amplifier k are connected by a daisy chain-like serial bus, let a communication period Tb in which the numeral control device and the amplifier B group perform transmission/reception be a positive integer-times (n times, n≥2) of a communication period Ta in which the numeral control device and the amplifier A group perform the transmission/reception, as to an instruction from the numeral control device CNC to the amplifier, data transmission to the amplifier A group in the period Ta and data transmission to the amplifier B group are implemented in a period of Tb=Ta*n. |
