| 摘要 |
PROBLEM TO BE SOLVED: To provide a numerical control device which communicates with IO units and can solve such a problem that the slave unit distant from the master unit requires longer latency time for replying, and the latency time increases and a band is wastefully consumed when the master unit communicates with many distant slave units.SOLUTION: A numerical control device 20 comprises: a timer circuit 23 which generates a signal of a cycle T; a counter circuit 22 which counts the number of DI/DO signal transfer performed at the cycle T until n times; and a table circuit 21 which can set the IO unit with which the numerical control device 20 performs the signal transfer for each count value of the counter circuit 22. When the signal of the cycle T is output from the timer circuit 23 as a trigger, the numerical control device 20 counts up the count value by the counter circuit 22, then refers to the table circuit 21 for the count value to determine the IO unit with which the numerical control device 20 performs the signal transfer. |
