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1-time Counting / Primary Direction Up
•
Up-counting starts at the load value.
•
If the parametrerised end value -1 is reached during counting in the positive direction, the
counter jumps back to the load value at the next positive count pulse. The internal gate is
automatically closed, the status bit End value reached ist set and a process alarm will be
triggered if it is parameterized.
•
To restart counting, the internal gate must be reopened. Counting starts again at the load
value.
•
Upon reaching the lower count limit the counter jumps to the upper count limit to continue
counting from there. The status bit Underflow performed is set and a process alarm will be
triggered if it is parameterised. All status bits remain set until they are reset with the bit Reset
status bits in the control word.
Limits
End value
Upper count limit
1-time Counting/ Primary Direction Down
GFK-2958E
1-time Counting, Primary Direction Up
Counuting Range
Valid range of values
–2 147 483 647 (–2
+ 1) to +2 147 483 647 (2
31
+2 147 483 648 (2
)
31
1-time Counting, Primary Direction Down
RSTi-EP User Manual
Chapter 5 Detailed Descriptions of I/O Modules
– 1)
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