Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 339

7 APPLICATION FUNCTIONS
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REMARKS
(1) When the sequence program executes at high speed, the scan time may take
longer because the execution time of the interrupt program affects the
performance of the interrupt program.
(2) When multiple interrupts occur at the same time, the operation delay may
occur.
(3) This function cannot be used during offline or online testing.
(4) Do not start the interrupt sequence program by the specified device's rise (PLS
instruction, etc.) and fall (PLF instruction, etc.); the change in the device may
not be read.
MELSEC-Q
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