US Patent No. 9,377,771

NUMERICAL CONTROLLER FOR COMMUNICATION WITH I/O UNITS


Patent No. 9,377,771
Issue Date June 28, 2016
Title Numerical Controller For Communication With I/o Units
Inventorship Yoshito Miyazaki, Minamitsuru-gun (JP)
Hiroshige Ando, Minamitsuru-gun (JP)
Assignee FANUC Corporation, Minamitsuru-gun, Yamanashi (JP)

Claim of US Patent No. 9,377,771

1. A numerical controller for communication with I/O units, wherein the numerical controller is chain-connected with the I/O
units so that it transmits DI/DO signals to and receives DI/DO signals from the I/O units by master-slave communication, the
numerical controller comprising:
a timer circuit configured to generate a signal every predetermined period;
a counter unit configured to count the number of signals generated by the timer circuit up to a predetermined number;
an I/O unit transfer order setting unit configured to set, from among the I/O units, an I/O unit with which transfer of the
DI/DO signals is to be performed for each count value of the counter unit;

an I/O unit transfer period group setting unit configured to divide the I/O units into groups according to the transfer period
of the DI/DO signals; and

an automatic setting unit configured to automatically perform the setting of the I/O unit transfer order setting unit, based
on contents set by the I/O unit transfer period group setting unit;

wherein the DI/DO signals of the I/O units set in the I/O unit transfer order setting unit are transferred according to the
count value of the counter unit,

wherein information set in the I/O unit transfer period group setting unit comprises order information of the I/O units according
to a distance from the numerical controller, and

wherein the automatic setting unit sets the I/O units to which the DI/DO signals are transferred in the I/O unit transfer
order setting unit, based on the order information.