Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 250

(c) Devices that require module synchronization setting
To set the following devices for the initial device value setting range, set "Module Synchronization" in the PLC
system tab of the PLC parameter dialog box.
If the setting is not configured, the initial device values may not be set to the target module properly.
• Intelligent function module device (U\G)
• Link direct device (J\W, J\SW)
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