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NT20S Internal Processing
Appendix E
Event Processing (When Using Direct Connection)
When the status of the NT20S changes during operation, the processing for writing the changed data to the relevant
area of the PC memory is executed.
This kind of processing is only executed when statuses change. When changes occur simultaneously, the proces-
sings are executed in accordance with the order of priority.
[NT20S processing] [Details of processing]
High
Low
Writing to PT status notify area
Writing to the PT status notify area in order to inform the PC
of changes in the PT operation status.
Bit writing
(PT ³ PC)
Writing to bits in order to inform the PC of touch switch
statuses.
Writing to numeral memory tables
Updating the contents of words allocated to the PC when the
value in a numeral memory table has changed.
Writing to character string memory tables
Updating the contents of words allocated to the PC when the
contents of a character string memory table have changed.
Order of priority
(PT ³ PC)
(PT ³ PC)
(PT ³ PC)
Data is only written to PC bits and numeral/character string memory tables for elements in screens currently being
displayed. If the contents of numeral/character string memory tables that are not being displayed change, the
changed data is not written to the PC.
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