| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an anomaly detection device for a servo system that can detect in advance a runaway movement of a controlled object beyond a movement range without wrong detection during a normal operation. <P>SOLUTION: A servo system in which a control arithmetic means 10 decides a controlled variable from a position command pulse input from an upper device 12 and a feedback pulse output by a position detection means 3 disposed on a servomotor 2, and a motor drive means 11 controls the rotation of the servomotor 2 is provided with a maximum movement amount computation means 6 for computing a movement amount from a positive or negative integral value of the position command pulse and an allowable pulse P, an integral value computation means 7 for computing an integral value of the feedback pulse, a comparison means 8 for comparing the integral value of the feedback pulse with a maximum movement amount, and an anomaly detection means 9 for detecting a runaway of a controlled object in dependence on the result by the comparison means 8. The maximum movement amount computation means 6 holds an update on the maximum movement amount. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
