Profibus Address Switches - Siemens SINAMICS S120 Device Manual

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 contact at both ends with the greatest possible surface area.
8.20.7

PROFIBUS address switches

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 8- 24 PROFIBUS address switches
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. Via the 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. Via the PROFIBUS address switch 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.
Cabinet Modules NEMA
Manual, 04/2014, A5E03586450A
(00 ) and 127
dec hex
Significance
16 = 16
1
16 = 1
0
coding switches to 0
dec
switches. In this case, p0918 is only used to read the address.
(7F ) can be set as the address. The high rotary
dec hex
21
dec
15
hex
1
5
(00 ) and 127 (7F
hex dec hex
8.20 K90, Control Unit CU320-2 DP
, and the low rotary coding
1
.
0
Examples
35
dec
23
hex
2
3
(00 ).
dec hex
).
Options
126
dec
7E
hex
7
E
411