Mitsubishi Electric MELSEC iQ-R Series User Manual page 525

Operating procedure
The following describes the operating procedure for this function.
1.
Rebuild (reassign) all data.
[Convert]  [Rebuild All]
2.
Set the CPU module to the STOP state.
3.
Write the new program files. When initial values have been set in the labels used in the program, write the label initial
value file together with the program files.
[Online]  [Write to PLC]
4.
Set the CPU module to the RUN state. (Labels are initialized only when the operating state is changed from STOP to
RUN for the first time.)
5.
Labels are not initialized at the second state change or later. Label initial values can be set at the second state change or
later depending on the parameter settings. ( Page 524 Label Initial Value Reflection Setting)
Since this function automatically initializes labels (zero clear), the reset operation after writing is unnecessary.
Labels are initialized only when the data is written to the programmable controller for the first time after data is
rebuilt (reassigned). To write the same project to other programmable controller, rebuild (reassign) the data
again before writing.
Precautions
The following describes precautions on this function.
• Even though SM326 (SFC device/label clear mode) is on (device/label values are kept), only labels are initialized when
data is rebuilt and then written to the programmable controller. (Devices are kept.)
• Before boot operation, clear the value of the latch label. Even if the boot file after rebuilt all (reassignment) is written to the
SD memory card and boot operation is executed, label initialization function does not operate.
• Once all data is rebuilt (reassigned) and written, the label initialization cannot be canceled. For example, when all data is
written to the programmable controller without being rebuilt (reassigned) again after the data is rebuilt (reassigned) and
written to the programmable controller, labels will be initialized after the CPU module is powered on or the operating status
of the CPU module is switched from STOP to RUN.
31 LABEL INITIALIZATION FUNCTION
31.1 Initialization of Labels After Rebuilt All (Reassignment)
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