Pilz PNOZ m B0 - Manual (Page 17)

Fieldbus Modules
Operating Manual PNOZmulti 2 Communication Interfaces
1002971­EN­02 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
Access to non­existent table
The Master requests segment 1 from table 24. As there is no table 24, the Slave registers
an error by sending back "255".