Omron Sysmac NX-PD1000 User Manual page 17

Safety Precautions
Online Editing
Execute online editing only after confirming that no adverse effects will be caused by devia-
tions in the timing of I/O. If you perform online editing, the task execution time may exceed
the task period, I/O may not be refreshed with external devices, input signals may not be
read, and output timing may change.
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NX-series System Units User's Manual (W523)