Siemens SINAMICS - PROFIBUS Address Switch

3.2.2.7 PROFIBUS address switch
On the CU320-2 DP, the PROFIBUS address is set as a hexadecimal value via two rotary
coding switches. Values between 0
dec
(00
hex
) and 127
dec
(7F
hex
) can be set as the address. The
upper rotary coding switch (H) is used to set the hexadecimal value for 16
1
and the lower rotary
coding switch (L) is used to set the hexadecimal value for 16
0
.
Table 3-21 PROFIBUS address switch
Rotary coding switches Significance Examples
21
dec
35
dec
126
dec
15
hex
23
hex
7E
hex
'3
+
16
1
= 16 1 2 7
'3
/
16
0
= 1 5 3 E
Setting the PROFIBUS address
The factory setting for the rotary coding switches is 0
dec
(00
hex
).
There are two ways to set the PROFIBUS address:
1. via a parameter
– To set the bus address for a PROFIBUS node using STARTER, first set the rotary code
switches to 0
dec
(00
hex
) and/or 127
dec
(7F
hex
).
– Use the parameter to set the address to a value between 1 and 126.
2. Using the PROFIBUS address switches on the Control Unit
– The address is set manually to values between 1 and 126 using the rotary coding
switches. In this case, the parameter is only used to read the address.
Note
The rotary coding switches used to set the PROFIBUS address are located beneath the cover.
Control Units
3.2 Control Unit CU320-2 DP (PROFIBUS)
Supplementary component descriptions
36 Manual, 06/2019