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3. Profibus-DP
General information
Bus systems are connecting configurations that generate communication between several components.
Profibus DP is a manufacturer-independent open communication system for applications in the fields of
production, process and industrial building automation. It is broken down into three variants:
Profibus FMS for data communication between controls on the production and process management
level.
Profibus PA for process engineering applications.
Profibus DP for fast data exchange between control units and decentralized peripherals in process
automation.
The Profibus system comprises the following device types:
DP master class 1 (DPM1) is a control for cyclic information exchange with a DP Slave.
DP master class 2 (DPM2) is a programming or project processing device or operating equipment.
DP Slave is a peripheral that reads in output data and passes input data onward to a PLC.
The Profibus system is broken down into a monomaster system and a multimaster system by the number
of active masters during the operating phase.
In a monomaster system, only one master class 1 and the DP slaves are active in the bus.
In a multimaster system, several masters and the DP slaves are active in the bus. The masters can
optionally either belong to class 1 or class 2.
Profibus-DP is characterized by the following properties:
Short response times (1 ms with 32 users und 12 MBaud)
Reliable transmission procedure (Hamming distance 4)
Availability of a wide range of standardized system components
Good diagnostic capability
Simply handling and facility for upgrading
User-oriented bus system
Open system
Profibus-DP ist standardized by EN 50170 Vol. 2. This standard defines the communication and user
profiles. User profile for the interface converter is profile 1.1. The user profile is differentiated in relation to
the number of supported functions according device class 1 and 2. Device class 2 provides a greater
number and comprises all the functions of class 1. Parameterization and preset functions are supported
only by class 2. The device supports both class 1 and 2.
GSD file
The device master data file (GSD-file) is a descriptive file describing all required operating data of the
Profibus user. The data itself are also filed in the ROM of the user. The data can be subdivided into two
sections:
General definitions contain information such as the manufacturer's name, product name, ident number,
Profibus-specific parameters and baud rates.
Application-related configurations include information relating to configuration options, parameters,
parameter descriptions, hardware and software status and diagnostic capabilities.
Format and contents are defined in standard EN 50170.
The GSD file's ident number is 059B for all described products. The GSD file is prior condition for
parameterization and configuration of the inclination sensor by a configuration tool.
Baumer_GNAMG_Profibus_MA_EN
07.18
5/19
Baumer IVO GmbH & Co. KG
Villingen-Schwenningen, Germany