Mitsubishi Electric Q Series Programming Manual page 56

4 POSITIONING DEDICATED SIGNALS
POINTS
(1) When the servo amplifier is not started (LED: "AA", "Ab", "AC", "Ad" or "AE"), if
the control loop changing command is turned ON/OFF, the command becomes
invalid.
(2) When the followings are operated during the fully closed loop, it returns to the
semi closed loop control.
(a) Power supply OFF or reset of the Multiple CPU system
(b) Wire breakage of the SSCNET cable between the servo amplifier and
Motion controller
(c) Control circuit power supply OFF of the servo amplifier
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