3
Commissioning
Communication
32
Siemens AG CM2G5111en
2014-05-16
NOTICE
bus address, baud rate or protocol selection that has been changed only
becomes effective once the drive has been switched off and back on again.
Restart the drive after changing the bus address.
USS protocol
Using the USS protocol (Universal Serial Interface), users can set up a serial data
connection between a higher-level master system and several slave systems (RS
485 interface). Master systems can be building services control systems (e.g.,
Desigo), programmable logic controllers or PCs.
Basic settings
Parameter Description
p0015 Macro drive unit
During the basic commissioning, select the value 108 "USS fieldbus", or with
firmware < 4.6 the value 21.
p2020 Value Baud rate
4
5
6
7
8
9
10
11
12
13
2400
4800
9600
19200
38400
57600
76800
93750
115200
187500
p2021 Valid USS addresses: 1…30
Invalid USS addresses: 0.31…127
p2022 Fieldbus interface USS PZD number
Setting the number of 16-bit words in the PZD part of the USS telegram
p2023 Fieldbus interface USS PKW number
Setting the number of 16-bit words in the PKW part of the USS telegram
0
3
4
127
0 words
3 words
4 words
Variable number of words
p2030 Fieldbus protocol selection
1: USS
p2040 Fieldbus interface, monitoring time [ms]
Setting the time to monitor the process data received via fieldbus. If no process data
is received within this time, an appropriate message is output
The setting 0 ms deactivates the monitoring.
3.7.2
3.7.2.1
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