User Manual Section 5
GFK-2958L May 2021
Detailed Description of I/O Modules 238
Figure 128: 1-time Counting, Cancelled Counting
•
Counting (up and down) starts at the load value, the entire counting range is used.
•
Upon exceeding the upper or lower count limit, the counter jumps to the other count
limit respectively. The internal gate is automatically closed, the status bit Overflow
performed, or Underflow performed is set and a process alarm will be triggered if it is
parameterized.
To restart counting, the internal gate must be reopened. Depending on the parameters set,
counting continues from the current counting value (Interrupt counting) or it starts again
from the load value (Cancel counting).
One-time Counting/ Primary Direction Up
Figure 129: 1-time Counting, Primary Direction Up
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