Lenze I/O system 1000 System Manual - Manual (Page 183)

Product description
I/O compound modules − counter
Two counters 32 bits, 24 V DC − EPM−S601
3
l
183 EDSIO1000 EN 7.0
B) Main counting direction forwards:
Limits Counting range
Final value −2 147 483 646 (−2 31 +1) to +2 147 483 646 (2 31 −1)
Lower counting limit −2 147 483 648 (−2 31 )
Function:
ƒ For starting the counting process the internal gate has to be opened.
– The counter counts forwards from the loading value.
– If the counter reaches the final value −1 in the positive direction, it skips to the
loading value at the next positive count pulse and continues to count from there.
– You can also count above the lower counting limit.
ƒ For stopping the counting process the internal gate has to be closed.
Final value
Lower counting
limit value
Loaded value
0
Counter starts
Overflow
Underflow
Time
Counter content
Counter stops
SLIO036
Fig. 3−57 Example of "Counting periodically" and main counting direction forwards