| 摘要 |
PURPOSE:To enable failure to be monitored without relation to the lowering of controlling power voltage, by dividing a failure reset procedure for monitoring the failure, into two, namely, a failure reset and a failure indication reset, and by adopting a failure information containing system with nonvolatile storage. CONSTITUTION:By a micom system 2, a power source is fed from a controlling power source 1, and a power converter 3 feeding current to a motor 4 with a program stored in a memory is controlled. In the meantime, when control power input voltage 10 is monitored by an input voltage monitor 9 and failure is generated, then the content of the failure is indicated in a failure indicator 6, and signal waveforms at respective sections before and after the generation of the failure and stored in nonvolatile storage 11. Then, according to signal from a failure reset switch 7 and a failure indication reset switch 8, a failure reset for the re-start of operation and a reset for indicating the failure and for retaining failure data are executed. |
