Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 45

(2) When to determine valid parameters
The CPU module automatically searches for parameters in the following timing and operates by the settings of
the parameters stored in the drives:
• the CPU module is powered off and then on, or
• it is reset.
When storing parameters to a drive by executing the write to PLC function from a programming tool, the timing for
validating the parameters differs depending on the drive.
(a) When parameters are stored to the drive different from the one that stores the
parameters in operation
The parameters are validated according to the priority set to the drive after the CPU module is powered off and
then on or is reset.
(b) When parameters are stored to the drive same as the one that stores the parameters
in operation
Only the setting made in the Device tab of the PLC parameter dialog box is validated after "Write to PLC" is
performed.
To validate all parameter settings, power off and then on or reset the CPU module.
CHAPTER 2 APPLICATION OF PROGRAMMING
2
43