Mitsubishi Electric Q03UDVCPU User Manual page 181

(4) Functions that cannot be performed during write processing and clear
processing
The following functions cannot be executed during the write or clear processing to the IP address storage area.
Do not execute the functions before the processing is completed. Doing so may cause an error.
If operation of writing to or clearing the IP address storage area (flash ROM) is executed during the execution of
the following functions, the write or clear operation is processed as an error.
• Online Program Change
• Export to ROM format
• Write to PLC (flash ROM)
• CPU module data backup/restoration function
(5) Execution timing of write processing and clear processing
• Since the status on SM1292 (IP address storage area write request) and SM1295 (IP address storage area
clear request) are checked in the END processing, processing of writing to or clearing the IP address
storage area (flash ROM) cannot be executed if a contact is turned off and on, or turning on and off in one
scan.
• If SM1292 (IP address storage area write request) is turned off and on again while writing to the IP address
storage area (flash ROM), the write processing executed earlier is completed properly and the processing
executed later is ignored. (The same occurs for the clear operation.)
• If SM1295 (IP address storage area clear request) is turned off and on while writing to the IP address
storage area (flash ROM), the clear operation is processed as an error. (The same occurs when the write
operation is executed during the clear processing execution.)
• If SM1292 (IP address storage area write request) and SM1295 (IP address storage area clear request) are
turned off and on in one scan, the write operation is prior to be executed, and the clear operation is
processed as an error.
CHAPTER 11 IP ADDRESS CHANGE FUNCTION
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