| 摘要 |
PURPOSE:To prevent a control device from becoming out of control by a method wherein a moving command for the servomotor is stopped temporarily when the value of an error register in a servo circuit has become beyond a set value. CONSTITUTION:When the servomotor M1 is not driven in accordance with the moving command therefor sufficiently due to some reason in spite of the input of moving command from the control unit 1, a large value is memorized in the error register. Then, the value of the error register 21 is read through a decoder 15 and when the value has arrived at a given set value, the control unit 1 stops the moving command and does not output the moving command until the value of the error register 21 has arrived at a given value. When the value of the error register 21 has arrived thereafter at a given value or less, control is started again.
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