Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 115)

8–2 Configuration: Extended Match Table and Counters
Publication 2755-833
Each parameter is defined below. The options for each parameter are
summarized in a table, and explained more fully in the text. The
default setting for each parameter is displayed in bold letters in the
table.
Screen Status
Field Type Options
Select
Auto Refresh
Reset All Counts
Reset Set Only
Next Set
Previous Set
This parameter can be used to control three different functions
relating to the extended match codes:
•
It determines whether the display is refreshed regularly
Selecting the default Auto Refresh setting will result in all
displayed counters being updated every second.
•
It permits resetting the value of extended match code table
counters to zero
Selecting Reset All Counts zeroes all extended counters, whether
they are among the currently displayed set or not. Selecting Reset
Set Only zeroes only those counters in the currently displayed set.
The system will ask you to confirm either reset command before
it takes any action.
•
It provides a means to move through all eight sets as necessary
Selecting Next Set displays the next set of sixteen extended match
code entries. Selecting Previous Set displays the previous set of
sixteen extended match code entries.
Both commands treat all eight sets as a closed loop. If you select
Next Set while displaying set 8, the system will display set 1. If
you select Previous Set while displaying set 1, the system will
display set 8.
Once you’ve selected either Next Set or Previous Set, you can
continue to scroll through all sets by repeatedly pressing [Return].
Note, however, that there may be a slight delay while the system
prepares and formats each new set for display. If you hold down
the [Return] key in an effort to speed up paging, you are likely to
pass your intended destination.
It is not necessary to assign extended match code values in sequence.
One could, for example, assign match patterns to entries 1, 2, 5, 7,
12, and 16 in set 1, nothing in set 2, and 33 through 35 in set 3. The
details of each application will determine the strategy used in
assigning (or not assigning) extended match code patterns.