| 摘要 |
PROBLEM TO BE SOLVED: To enable a noise resistance of a numerical control system to be increased while suppressing costs of a data communication apparatus and the numerical control system without excessively using an anti-noise component.SOLUTION: A filter circuit detachably attachable to a numerical control apparatus constituting a numerical control system and a connection part of a data communication apparatus is provided, and the filter circuit necessary to be replaced is specified by detecting alarm information by a data transfer error or a sign of the data transfer error. Thereby, even when the noise resistance of the whole filter circuit used for the numerical control system is not increased, the noise resistance of the numerical control system can be increased, while suppressing the cost of the whole numerical control system by increasing the noise resistance of the filter circuit by a necessary portion only. |
