MITSUBISHI ELECTRIC MOTION CONTROLLERS Q172DCPU - Manual (Page 125)

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4 AUXILIARY AND APPLIED FUNCTIONS
4.9 Servo Parameter Reading Function
(1) When the servo parameters are changed, the Motion CPU will be automatically
read the servo parameters and reflected them to the servo parameter storage
area in the Motion CPU. Therefore, an operation to read servo parameters is
unnecessary in the following cases.
(a) The parameters are changed by auto tuning.
(b) The parameters are changed by connecting directly MR Configurator to the
servo amplifier.
POINT
If the power supply of Multiple CPU system is turned off/reset or the power supply
of servo amplifier is turned off immediately after change, it may not be reflected.
(2) After executing the servo parameter reading function, when it needs to reflect the
servo parameters changed to the MT Developer, read the servo parameters from
the Motion CPU and save data.