ABB S800 I/O Manual page 42

CI801 Configuration Rules
The values in brackets are in Extended HART mode and HCIR.
In order to find out if a given configuration of analog and digital modules can be
used the following method should be used:
•
•
•
•
Module User
Type Parameters
AI801 13
AI810 13
42
Fill in number of modules in
Calculate the sum in the three columns:
– Sum User Parameters.
– Sum Input Bytes.
– Sum Output Bytes.
Calculate the three total sums for:
– ParamSize
– InSize
– OutSize.
Check that:
– ParamSize is less than or equal to 221 (220 if HCIR is used) in normal
mode, 218 (217 if HCIR is used) in Extended HART mode.
– InSize is less than or equal to 239 in normal mode, 199 in Extended HART
mode.
– OutSize is less than or equal to 112 in normal mode, 90 in Extended
HART mode.
If any of these three values is too high then the configuration can not be used.
Table 9. Calculation of Number of Modules on CI801
Input Output
Bytes
17
17
Table 9.
Number
of
Bytes
Modules
0
0
Section 3 Configuration
Sum Sum
User Para- Input
meters Bytes
3BSE020926-600
Sum
Output
Bytes