Fieldbus Modules
Operating Manual Communication interfaces
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17
4.1.4.2
Example 2 Access failed
Access to nonexistent segment
The Master requests segment 1 from table 23. The fieldbus module confirms both these de
tails and sends segment 1. Then the Master requests segment 111 from table 23. As this
table does not contain a segment 111, the Slave registers an error by sending back "255".
Master
Fieldbus module
23
1
0
17
18
19
31
17
18
19
31
23
1
17
18
19
31
23
111
23
255
0
0
X
X
X
X
0
