Technical data

R911305038 / 01 | Rexroth VCP-Operating Concept Electric Drives and Controls | Bosch Rexroth AG 6-119
PROFIBUS-DP raw
6.9 PROFIBUS-DP raw
Profibus DP provides a manufacturer- and controller-independent data
transmission protocol. The Profibus DP is a speed-optimized Profibus
variant that is specially tailored to communication between program-
mable controllers and decentralized peripheral devices.
Profibus DP is implemented in the operating device and meets the
requirements of parts 1 and 3 of the German standard DIN 19245. It
also corresponds to the European field bus standard EN 50170.
As the operating device fulfills standardization requirements, it can be
successfully integrated as a slave into the Profibus DP.
All operating devices can be linked using an integrated Profibus DP
additional module. You can also link several operating devices to one
master controller.
The entire PROFIBUS DP protocol is handled by the protocol chip
SPC3. Transfer speeds of up to 12 MBaud are possible.
The operating device is used in the bus as a decentralized module that
occupies up to 256 inputs and outputs. The size can be programmed
from between 8- and 32-byte IN data, and between 8- and 32-byte
OUT data. Data transfer is carried out via the peripheral area.
The input/output image is exchanged cyclically between the master
and operating device via the bus. In this context, the operating device
uses the cyclical input/output image for data exchange between the
master and the slave. The data content to be interpreted is defined for
both partners in a data profile.
All services required for running the operating device originate in the
operating device. The operating device has client functions.
The controller reacts to the requests of the operating device. It has ser-
ver functions.
The master module must interpret the incoming data according to the
profile and also respond according to the profile. This is carried out
using a function block in the controller that is able to interpret the
requests in the IN data, and write a response to the OUT data.
6.9.1 Specification for PROFIBUS-DP
The specification of the operating device in PROFIBUS DP is defined
using the device data base (GSD) file RX01081A.GSD.