| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a servo control system that can be operated more safely when a control unit or command unit is replaced. <P>SOLUTION: A drive unit 40 detects a relative position to a reference position whether a system power source is ON or OFF. The control unit 30 comprises first nonvolatile storing means 33, and the command unit 20 comprises second nonvolatile storing means 23. Upon a predetermined operation, the control unit stores position information depending on a position signal output by the drive unit in the first nonvolatile storing means, and the command unit stores the position information depending on the position signal output by the drive unit in the second nonvolatile storing means. When the system power source is switched from OFF to ON, the command unit compares the position information stored in the first nonvolatile storing means of the control unit and the position information stored in the second nonvolatile storing means of the command unit, and if they do not match, outputs an alarm. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
