Mitsubishi Electric MELSEC-Q/L Programming Manual page 809

Precautions
• The PLOADP, PUNLOADP and PSWAPP instructions cannot be executed simultaneously. If two or more of the above
instructions are executed simultaneously, the instruction executed later will not be executed. When using the above
instructions, provide interlocks manually to avoid simultaneous execution.
• Do not execute this instruction in an interrupt program. (Otherwise, a malfunction may result.)
• To execute the program that was transferred to the program memory with the PLOADP instruction, execute the scan
execution type with the PSCAN instruction (Page 722 Program scan execution registration)
• The "PLOADP instruction" and "Write during RUN" processing cannot be executed simultaneously.
• When a write during RUN request is given during processing of the PLOADP instruction, write during RUN is delayed. Write during RUN is started after the
processing of the PLOADP instruction is completed.
• When the PLOADP instruction is executed during write during RUN, the processing of the PLOADP instruction is delayed. The processing of the PLOADP
instruction is started after completion of write during RUN.
• Do not execute "Read from PLC" or "Verify with PLC" and the instruction simultaneously. If the instruction is executed,
"Read from PLC" or "Verify with PLC" is not complete normally because the program file status stored in the program
memory is changed. If executed, execute "Read from PLC" or "Verify with PLC" again after the instruction completion.
7 APPLICATION INSTRUCTIONS
7.19 Other Instructions
7
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