Telegram Structure - Siemens SINAMICS G120 Operating Instructions Manual

Additional settings
Parameter
p2020
p2022
p2023
p2040
7.7.2.2

Telegram structure

Overview
A USS telegram comprises a series of elements with a defined sequence. Each element
contains 11 bits.
Figure 7-10
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
Description
Setting the baud rate
Value Baud rate
4 2400
5 4800
6 9600
7 19200
8 38400
Fieldbus interface USS PZD number
Sets the number of 16-bit words in the PZD part of the USS telegram
Setting range: 0... 8 (0 ... 8 words)
Fieldbus interface USS PIV number
Sets the number of 16-bit words in the PIV part of the USS telegram
Setting range:
0, 3, 4: 0, 3 or 4 words
•
127: variable length
•
Fieldbus interface monitoring time [ms]
Sets the monitoring time to monitor the process data received via the fieldbus. If no
process data is received within this time, an appropriate message is output
Structure of a USS telegram
Configuring the fieldbus
7.7 Communication via RS485
Value Baud rate
9 57600
10 76800
11 93750
12 115200
13 187500
159