Lenze I/O system 1000 System Manual - Manual (Page 182)

Product description
I/O compound modules − counter
Two counters 32 bits, 24 V DC − EPM−S601
3
l
182 EDSIO1000 EN 7.0
Counting periodically
A) No main counting direction:
Limits Counting range
Lower counting limit −2 147 483 648 (−2 31 )
Upper counting limit +2 147 483 647 (2 31 −1)
Function:
ƒ For starting the counting process the internal gate has to be opened.
– The counter counts forwards from the loading value or backwards in the counting
range.
– If there is an overflow or underflow at the respective counting limit, the counter
skips to the loading value and continues to count from there.
ƒ For stopping the counting process the internal gate has to be closed.
Upper counting
limit value
Loaded value
0
Counter starts
Time
Counter content
Lower counting
limit value
Overflow
Underflow
Zero crossing
Counter stops
SLIO035
Fig. 3−56 Example of "Counting periodically" and no main counting direction