Profibus Address Switch - Siemens SINAMICS S120 Manual

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9.21 K90, Control Unit CU320-2 DP
PROFIBUS connectors
The first and last nodes in a bus must contain terminating resistors. Otherwise, data
transmission will not function correctly.
The bus terminating resistors are activated in the connector.
The cable shield must be connected at both ends and over a large surface area.
9.21.6

PROFIBUS address switch

The PROFIBUS address is set as a hexadecimal value via two rotary coding switches.
Values between 0
coding switch (H) is used to set the hexadecimal value for 16
switch (L) is used to set the hexadecimal value for 16
Table 9- 36 PROFIBUS address switch
Rotary coding switches
Setting the PROFIBUS address
The factory setting for the rotary coding switches is 0
There are two ways to set the PROFIBUS address:
1. Using parameter p0918
– To set the bus address for a PROFIBUS node using STARTER, first set the rotary
– Then use parameter p0918 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
The address switch is behind the blanking plate. The blanking plate is part of the scope of
supply.
400
(00 ) and 127
dec hex
Significance
16 = 16
1
16 = 1
0
code switches to 0 (00
dec
switches. In this case, p0918 is only used to read the address.
(7F ) can be set as the address. The upper rotary
dec hex
.
0
21
dec
15
hex
1
5
dec
) and/or 127 (7F
hex dec hex
and the lower rotary coding
1
Examples
35
dec
23
hex
2
3
(00 ).
hex
).
Cabinet Modules liquid cooled
Equipment Manual, 04/2020, A5E37067587A
126
dec
7E
hex
7
E