Eaton ELC-PB, Programming Manual

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E L C P r o g r a m m i n g M a n u a l
F o r m o r e i nf o r m a t i o n v i sit :
w w w. e a t o n . c o m
MN05003003E
3-138
Software
Counter
1
Software
counter
2
Software
counter
8
Count value
Software
comparator
x 6
1
2
6
Set / reset
Set / reset
Set / reset
c)
There are 6 software zone comparators available exclusively for zone compare operations.
The limit of 6 comparisons for zone compares does not include the comparisons of
DHSCS and DHSCR.
4. Descriptions of hardware comparators for the HSZ instruction:
a) Corresponding table for hardware counters and comparators
A group B group
Hardware counter
A1 A2 A3 A4 B1 B2 B3 B4
Counter No. C243, C245~C248, C251,C252 C244, C249, C250, C253, C254
Hi-speed compare
Set/Reset
Shares 4 hardware
comparators for group A
Shares 4 hardware
comparators for group B
b) Block diagram of hardware counters and comparators:
Set /res et
Count
value
Count
value
Set /res et
Set /res et
Set /res et
Hardware
counter
Hardware
counter
Hardware
comparator
Hardware
comparator
A
A
B B
A x 4
B x 4
B4
B1
A4
A1
A1
A4
B1
B4
I010
I040
I050
I080
c) The two groups can only be used once for each group, occupying 2 comparators. For
example, when DHSZ instruction uses A3 and A4 of group A comparators, only the other 2
comparators (A1, A2) are available for DHSCS and DHSCR instructions.
d)
When DHSCS uses I030 or I040, comparators A3 and A4 are no longer available for
DHSZ instruction. Also, when DHSCS uses I070 or I080, comparators B3 and B4 are no