ABB S800 Product Manual page 122

Advant Fieldbus 100 Load
Table 21. % of load on the Advant Fieldbus 100 by S800 I/O (up to 2000 m Bus Length)
Cycle
AI801
Time
AI810
AI820
(ms)
AI890
AI895
1 25.2% 15.6%
2
12.6% 7.8%
4 6.3% 3.9%
8
3.15% 1.95%
16
1.575% 0.975%
32 0.788% 0.488%
64
0.394% 0.244%
128 0.197% 0.122%
256 0.098% 0.061%
512
0.049% 0.03%
1024 0.025% 0.015%
2048 0.012% 0.008%
4096
0.006% 0.004%
(1) Readbacks increase the load depending on the cyclicity and with the same amount as the net load at the cycle time.
For Master the cycle time is 1024 which gives 0.009% more load. For MOD the cycle time is configurable.
(2) Total load = (load generated by INSCANT) + (load generated by OUTSCANT)
The total load if INSCANT is 32 ms and OUTSCANT is 64 ms is:
Total load = 0.788 + 0.244 = 1.032%
122
AO801
AI830 AO810
AI830A AO810V2 AO820
AI835 AO890
AO895
25.3% 25.23% 15.62%
12.6% 12.63% 7.815%
6.3% 6.325% 3.915%
3.15% 3.175% 1.965%
1.575% 1.6% 0.99%
0.788% 0.812% 0.503%
0.394% 0.418% 0.259%
0.197% 0.221% 0.137%
0.098% 0.123% 0.076%
0.049% 0.074% 0.046%
0.025% 0.049% 0.03%
0.012% 0.037% 0.023%
0.006% 0.031% 0.019%
Section 3 Technical Data and Performance
Module Type
DI801, DI802
DI803, DI810
DO801
DI811, DI814 DO810
DI820, DI821 DO815
DI830, DI831 DO821
DI885, DI890
8.8% 8.8%
4.4% 4.4%
2.2% 2.2%
1.1% 1.1%
0.55% 0.55%
0.275% 0.275%
0.138% 0.138%
0.069% 0.069%
0.034% 0.034%
0.017% 0.017%
0.009% 0.009%
0.004% 0.004%
0.002% 0.002%
(1)
, DO802
(1) (1) (2)

, DO814 , DP820
(1) (1)
, DO820 , INSCANT
(1) (1)
, DO890
25.2%
12.6%
6.3%
3.15%
1.575%
0.788%
0.394%
0.197%
0.098%
0.049%
0.025%
0.012%
0.006%
3BSE015969-600 A
(2)
DP820
OUT-
SCANT
15.6%
7.8%
3.9%
1.95%
0.975%
0.488%
0.244%
0.122%
0.061%
0.030%
0.015%
0.008%
0.004%