Commissioning (software)
5.8 Commissioning the Fail-safe Functions
Control Units CU240S
5-62 Operating Instructions, 11/2006, A5E00766042B AA
Behavior of PROFIBUS and PROFIsafe address
The behavior of PROFIBUS address (P0918) and PROFIsafe address (P9810) is shown in
the following tables:
Case DIP switch
setting
P0918
value
P9810
value
Behavior
1 0 B B PROFIBUS and PROFIsafe address identical and
determined by P0918.
Not allowed
2 0 B C PROFIBUS and PROFIsafe address differ.
Setting C is valid for PROFIsafe address.
Setting B is valid for PROFIBUS.
ok
3 A A C PROFIBUS and PROFIsafe address differ.
Setting C is valid for the PROFIsafe address.
Setting A (from DIP switch) is valid for PROFIBUS.
ok
4 A A A PROFIBUS and PROFIsafe address identical and
determined by the DIP switch.
Not allowed
With changing the addresses the following is valid:
Case DIP switch
setting
P0918
value
P9810
value
DIP switch setting
1 0 B1→B2 B1→B2 PROFIsafe address would also change from B1 to B2
when PROFIBUS address is changed as it is identical to
P0918.
Not allowed
2 0 B1→B2 C Although, PROFIBUS address is changed from B1 to B2,
the PROFIsafe address remains C as it differs from
P0918.
ok
3 0 B B→C Parameter P9810 is initially identical to P0918.
Only the PROFIsafe address changes from B to C.
ok
4 A1→A2 A1→A2 A1→A2 PROFIBUS and PROFIsafe address would change from
A1 to A2 after power cycle.
Not allowed
5 A1→A2 A1→A2 C The PROFIsafe address remains at C.
Only PROFIBUS address changes from A1 to A2 after
power cycle.
ok
6 A A A→C Parameter P9810 initially identical to P0918.
Only the PROFIsafe address changes from A to C.
ok
Warning
In particular, it must be observed that the PROFIsafe address is not determined by the DIP
switches (Case 4). In this case a possible hardware fault of the DIP switches will cause a
change of the PROFIsafe address.
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