0)&*'#"-CD4#+
Section 3-2
(%
3-2-2
Circular Counter
Configuring Circular
Counters
A Circular Counter has 32-bits (the full counting range) available to count up- or
downwards over the positive counting range between 0 and the Upper Count
Limit.
Configuring Upper Count
Limit
The Upper Count Limit can be configured between 1 and 4,294,967,295
(=FFFFFFFF
H
). By default the Upper Count Limit is equal to the maximum possi-
ble count limit of FFFFFFFF
H
.
For Circular Counters the Counter automatically rolls over to 0 if the Counter Value
exceeds the Upper Count Value and continues counting. If the Counter Value
goes below 0 the Counter rolls over to the Upper Count Value and continues
counting.
CNT1:
CNT2:
CNT3:
CNT4:
m+30
m+75
m+120
m+165
Counter Type:
0 = Circular Counter
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
0
(=00000000
)
≤
≤
≤
≤
H
H
Rollover
1 Upper Count Limit 4,294,967,295
00000001 Upper Count Limit FFFFFFFF
Up
Counting
Down
Counting
Counter Value
CNT1:
CNT2:
CNT3:
CNT4:
m+33
m+78
m+123
m+168
m+34
m+79
m+124
m+169
Upper Count Limit
Set Upper Count Limit for Circular Counters between 00000001
H
and FFFFFFFF
H
.
Per default (=00000000
H
) the Upper Count Limit is equal to FFFFFFFF
H
.
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
W902-E2-03.book Seite 52 Donnerstag, 7. Oktober 2004 2:06 14
Summary of Contents for CS1W-CT021
Page 1: ...OPERATION MANUAL High speed Counter Units CS1W CT021 CS1W CT041 Cat No W902 E2 03...
Page 3: ...W902 E2 03 book Seite iv Donnerstag 7 Oktober 2004 2 06 14...
Page 5: ...W902 E2 03 book Seite vi Donnerstag 7 Oktober 2004 2 06 14...
Page 39: ...W902 E2 03 book Seite 24 Donnerstag 7 Oktober 2004 2 06 14...
Page 59: ...A 2 Section 2 3 W902 E2 03 book Seite 44 Donnerstag 7 Oktober 2004 2 06 14...
Page 155: ...4 Section 4 6 W902 E2 03 book Seite 140 Donnerstag 7 Oktober 2004 2 06 14...
Page 199: ...G W902 E2 03 book Seite 184 Donnerstag 7 Oktober 2004 2 06 14...