| 摘要 |
PURPOSE:To heighten a reliability of the numerical control function, by approving a presence of the work completion signal within the period of send start leading edge of a work start command to generate an alarm as well as to inhibit a practice of auxiliary functional command for the time when said signal is present. CONSTITUTION:From an instruction tape PT through a tape reader 31 or from a command inputted to an input register 33 from a memory 32, is sent out an auxiliary functional command MFD to an information line 11-1 from an auxiliary function control circuit 34. After said command MFD is sent out, a work start indication MFM is sent out to be applied to AND gate G1 through a flip flop F1, F2, with a work start command MFS outputted from an AND gate G2 if at a normal time. When a work finish signal FIN has been already generated within the period a check pulse CP is sent out from the AND gate G1, the AND gate G2 becomes close with the sending out inhibited of the work start command MFS, simultaneously with an alarm signal ALM outputted from a flip flop F3, thus an anomalous condition is made informed. |
