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1. Introduction
1.3 PROFIBUS DP
Overview of PROFIBUS DP
PROFIBUS DP is one of fieldbus networks that provide easy interconnection between control
devices (PLC, PC, sensor, actuator, etc.).
PROFIBUS DP was co-developed by Siemens, Bosch, and ABB as an open communication
standard to connect various field devices (sensor, actuator, robot controller, etc.). Because of
the open communication standard, PROFIBUS DP can easily construct multi-vendor system
with various devices developed around the world.
Controller
Intelligent I/O
from Company C
Photo Sensor
from Company E
A
nalog Device
from Company G
HMI Device
from Company F
Motor Driver
from Company A
PROFIBUS DP Network
Motor Driver
from Company B
Intelligent I/O
from Company D
Features of PROFIBUS DP
Reduced Wiring
Compared with a parallel wiring, PROFIBUS DP employing dedicated 2-wire cable
substantially reduces the number of necessary wires, wiring time and cost.
Detachable communication connector provides you a simple wiring between devices
(stations) and an easy network separation or reconstruction.
Fast Communication
PROFIBUS DP communication speed can be set up to 12Mbps. This is faster than
DeviceNet, another communication standard supported by the fieldbus I/O.
Open Standard (Multi-vendor)
Due to an open communication standard, various devices from many manufacturers are
available. Standardized communication connectors allow you to reconstruct your network
easily.
The sort of maintenance parts stored on site (factory, etc.) can be reduced because different
manufacturers’ devices are used in case of a breakdown. Similar products are available
around the world due to a global standard PROFIBUS DP.
Large Numbers of Inputs/Outputs
For the standard I/O and expansion I/O, the number of inputs/outputs is limited to up to 512
inputs and 512 outputs. When configuring a device to be a master of fieldbus I/O, you can
control more than 16,000 total inputs and outputs.
For a slave device, 1,952 inputs (244 bytes) and 1,952 outputs (244 bytes) are available.
Fieldbus I/O Rev.6 5