Data Scanning - ABB S800 I/O Manual

Section 3 Configuration

Data Scanning

ModuleBus data is scanned (read or written) cyclically, depending on the I/O
module configuration. To calculate the I/O scan cycle time in the FCI do as follows:
Totalize (number of module type x) * (used execution time for type x)
(see
the total value to the nearest higher multiple of two (2) to get the I/O scan cycle
time.
AI801, AI810, AI890, AI895
AI820, AI825
AI830, AI830A, AI835, AI835A,
AI893
AI843
AI815, AI845
AO801, AO810, AO810V2,
AO815, AO890, AO895
AO820
AO845, AO845A
DI801, DI802, DI803, DI810,
DI811, DI814, DI820, DI821
DI818
DI828
DI840
3BSE020926-600
Table 14) if the value is a multiple of 2 add 2 to the value. Otherwise increase
Table 14. I/O Scan Cycle Time in the FCI
Module Type
Execution Time Used in ms
CI801 CI830
3.00 3.00
1.50 1.50
0.40 0.40
0.40 -
3.00 -
1.20 1.20
0.60 0.60
1.20 -
0.43 0.43
0.86 -
0.43 -
0.43 -
Data Scanning
CI840
Redundan
Single I/O
t I/O pair
3.00 -
1.50 -
0.40 -
0.40 0.80
3.00 6.00
1.20 -
0.60 -
1.20 2.40
0.50 -
1.0 -
0.50 -
0.50 1.00
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