Omron NT11 - 01-2004 User Manual page 171

NT11 Internal Processing
Event Processing
When the status of the NT11 changes during operation, the processing for writing the changed data to the rel-
evant area of the PLC memory is executed.
This kind of processing is only executed when statuses change. When changes occur simultaneously, the pro-
cess is executed in accordance with the order of priority.
[NT11 processing]
High
Writing to the PT status notify area
Bit writing
Writing to numeral memory table
Low
Writing to character string memory table
Note Data is only written to PLC bits and numeral/character string memory table entries for elements in
screens currently being displayed. If the contents of numeral/character string memory table entries that
are not being displayed change, the changed contents are not written to the PLC.
158
[Details of processing]
Writing to the PT status notify area in order to inform
(PT→PLC)
the PLC of changes in the PT operating status.
Writing to bits in order to inform the PLC that a touch
(PT→PLC)
switch has been pressed.
Changing the contents of words allocated to the PLC
(PT→PLC)
when the value in a numeral memory table has
changed.
Changing the contents of words allocated to the PLC
(PT→PLC)
when the value in a numeral memory table has
changed.
Appendix F