PfofiBus Gateway
(5) Setting for I/O data consistency
With normal settings, consistency of ProfiBus I/O data is guaranteed in units of words and bytes. It is
important that each command code and related parameters in the command area are read or written
together.
rds and bytes. It is
important that each command code and related parameters in the command area are read or written
together.
To ensure consistent data access, an applicable item must be set to ensure data consistency in the
HW Config screen, and data must be accessed using the SFC14 and SFC15.
To ensure consistent data access, an applicable item must be set to ensure data consistency in the
HW Config screen, and data must be accessed using the SFC14 and SFC15.
With command function blocks, the first five words in the command area are accessed using the
SFC14/15. Accordingly, the data consistency setting must be performed in the I/O areas for the
applicable five words, as shown in the example below.
With command function blocks, the first five words in the command area are accessed using the
SFC14/15. Accordingly, the data consistency setting must be performed in the I/O areas for the
applicable five words, as shown in the example below.
Set “Total length,” instead of a
unit (Byte or Word) under
Consistent over.
Double-click a desired line
or select
Object Properties
in the pull-down menu.
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