Telegram Structure; Setting The Address - Siemens SINAMICS G120XA Operating Instructions Manual

Advanced commissioning
6.2 Drive control
6.2.4.2

Setting the address

Function description
Procedure
1. Using parameter p2021, set the address using an operator panel or SINAMICS G120 Smart
Access.
Permissible addresses: 1 ... 247.
2. Switch off the converter power supply.
3. Wait until all LEDs on the converter are dark.
4. Switch on the converter power supply again.
Your settings become active after switching on.
You have set the bus address.
❒
Parameters
Parameter
p2021
6.2.4.3

Telegram structure

Overview
A USS telegram comprises a series of elements with a defined sequence. Each element
contains 11 bits.
Figure 6-8
Telegram part
Start delay / re‐
sponse delay
STX
LGE
168
Description
Fieldbus interface address
Structure of a USS telegram
Description
There is always a start and/or response delay between two telegrams.
Telegram monitoring (Page 173)
An ASCII character (02 hex) indicates the beginning of the message.
The telegram length "LGE" is calculated as follows:
LGE = user data (n bytes) + ADR (1 byte) + BCC (1 byte)
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
Factory setting
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SINAMICS G120XA converter