turck BL20 Series - 12.1.8 Main count direction

355
2020/09
Count modes
The count modes are used for supporting different counter applications such as the counting of
bulk goods.
The following modes can be selected:
 Continuous counting, such as for positioning with 24 VDC incremental sensors
 Single-action counting, such as for counting units up to a maximum limit
 Periodical count, such as in applications with recurring count operations
Maximum count range
 The upper count limit is +2 147 483 647 (2
31
-1)
 The lower count limit is -2 147 483 648 (-2
31
)
12.1.8 Main count direction
The main count direction determines the behavior of the counter when the set count limit is
reached. On reaching a count limit, the count value ”jumps” to a defined value. Three different val-
ues are possible:
 Lower limit
 Upper limit
 Load value
The following table shows which of the three values the counter accepts according to the main
count direction set and the operating mode:
Mode
Main count direction Upper count limit Lower count limit
– Continuous count
none Jump to lower limit Jump to upper limit
Up Jump to lower limit Jump to upper limit
Down Jump to lower limit Jump to upper limit
– Single count
none Jump to lower limit Jump to upper limit
Up Jump to load value Jump to upper limit
Down Jump to lower limit Jump to load value
– Periodical count
none Jump to load value Jump to load value
Up Jump to load value Jump to upper limit
Down Jump to lower limit Jump to load value