Bus Load Calculation Up To 15,000 Meters - ABB S800 I/O User Manual

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6D' 
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6D'(
0.065%
$ !
0.032%
!#
0.016%
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0.008%
#(%
(1) 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%.
(2) Readbacks increase the load depending on the cyclicity and with the same amount as the net load at that
cycle time. For Master the cycle time is 1024 which gives 0.016% more load. For MOD the cycle time is
configurable.
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For bus length 15,000 m (16,400 yards) use
Advant Fieldbus 100 load must be equal to or less than 50%
1 ms cycle time is not allowed.
3BSE 020 925R101
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6D'" 6P'
6D'!
6D'"$ 6P'(
0.046% 0.065% 0.097%
0.023% 0.032% 0.065%
0.012% 0.016% 0.049%
0.006% 0.008% 0.041%
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9D' Ã9D'
9D' #Ã9D'!

6P'! 9D'! Ã9D'"
9D'" Ã9D''$
9D'(
0.069% 0.033%
0.046% 0.016%
0.035% 0.008%
0.029% 0.004%
Table
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6q‰h‡ÃAvryqiˆ†
9P' 
DP820
9P' #
(1)
DP820
OUT-
9P' $
INSCANT
SCANT
9P'!
9P'!
9P'(
(2)
0.033% 0.065%
(2)
0.016% 0.032%
(2)
0.008% 0.016%
(2)
0.004% 0.008%
3-7.
ÃG‚hqvt
(1)
0.046%
0.023%
0.012%
0.006%
31