Siemens SINAMICS S120 - Example: Telegram Structure for Cyclic Data Transmission

Communication via PROFIBUS
General information about PROFIBUS
4-80
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
4.1.2 Example: Telegram structure for cyclic data transmission
Task
The drive system comprises the following components and drive objects:
S Active Line Module A_INF
S Single Motor Module SERVO
S Double Motor Module 1 SERVO
S Double Motor Module 2 SERVO
S Control Unit with Terminal Board 30 (TB30) TB30
The process data for all of these components is to be exchanged with the
higher-level automation system.
S Telegrams to be used:
– Telegram 370 for Active Line Module
– Standard telegram 6 for Motor Modules
– User defined for Terminal Board 30
Component and telegram structure
The predefined component structure results in the telegram structure shown in the
following diagram.
profibus_bsp_kompo_telegr.vsd
Telegram structure
Header
Active
Line
Module
Single
Motor
Module
Double
Motor
Module
1
Trailer
Double
Motor
Module
2
Terminal
Board
30
Component structure
Active
Line
Module
Single
Motor
Module
Double
Motor
Module
1 – 2
Control
Unit
Terminal
Board
30
1 2 3 4 5
4321
5
Fig. 4-2 Component and telegram structure
The sequence of components/objects can be checked using p0978[0...15].