Appendix
74
04/99 AWB 27-1184 GB
Correct station address assignment:
The required amount of data can be sent and
received successfully by assigning different slave
addresses with the topology configurator as follows:
Slave A: station 3
Slave B: station 2
Slave C: station 1
Figure 28: Subdivision of the COB with functionally correct
station address assignment
No overlapping takes place in this case. After polling
the first station, the master has sent 48 bytes but only
received 38 bytes. Including the unused 10 bytes, a
total of 20 bytes of memory are now available. This is
used by the second and third polling process, where
the master receives 10 bytes more from both stations
2 and 3 (40/50 bytes) than it sends (30/40 bytes).
A
B
C
10
48
30
40
A
B
C
38
40
50
128
128
욾욾
free
Send
Receive
Byte
Byte
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