Siemens A1 User Manual
Advanced Applications
International English
52
MICROMASTER Applications Handbook
· Parameters can be set up and changed via the interface.
· Performance can be continuously monitored and controlled.
8.4 Using
PROFIBUS
8.4.1
What is PROFIBUS?
PROFIBUS is an open standard communication protocol which has been designed
and developed for use in general industrial applications. The standard is defined in
EN50170 (volume 2) and has been developed, agreed and adopted by many
manufacturers worldwide.
and developed for use in general industrial applications. The standard is defined in
EN50170 (volume 2) and has been developed, agreed and adopted by many
manufacturers worldwide.
PROFIBUS control is now available for a wide variety of products, from many
different companies such as drives, actuators, valves, as well as programmable
logic controllers (PLCs) and other system controllers. PROFIBUS operates over a
variety of hardware interconnections such as fiber optics and RS485.
different companies such as drives, actuators, valves, as well as programmable
logic controllers (PLCs) and other system controllers. PROFIBUS operates over a
variety of hardware interconnections such as fiber optics and RS485.
There are three versions of PROFIBUS: FMS, DP and PA; these versions will work
together. The most commonly used version is the DP version, intended for general
industrial applications. This is the version supported by Siemens Drives.
together. The most commonly used version is the DP version, intended for general
industrial applications. This is the version supported by Siemens Drives.
8.4.2
Using PROFIBUS with Siemens Standard Drives
In order to connect to a PROFIBUS system a PROFIUS adapter module is
required. This module mounts on the front of the drive in the same way as the
AOP, and uses the RS485 serial port to communicate to the drive.
required. This module mounts on the front of the drive in the same way as the
AOP, and uses the RS485 serial port to communicate to the drive.
A nine way ‘D type’ connector, which is a PROFIBUS standard, is incorporated
into the module.
into the module.
The drive may be controlled and monitored via the main PROFIBUS system in a
similar way to the USS. The PROFIBUS protocol is more complex than the USS
protocol (in fact, the USS is a simplified version) and control programmes are best
developed using proprietary software.
similar way to the USS. The PROFIBUS protocol is more complex than the USS
protocol (in fact, the USS is a simplified version) and control programmes are best
developed using proprietary software.
Although a PROFIBUS system is more complex than for instance, the USS
Protocol, it offers the following advantages:
Protocol, it offers the following advantages:
· Open, clearly defined system.
· Many different products from many different manufacturers.
· Well proven in many industrial applications.
· Reduced wiring; easy set up re-programming, monitor and control.
· Very fast; up to 12 Mbaud.
· Up to 125 slaves on one DP system.
· Single or Multi-master operation possible.
· One to one or braodcast communications.
· Support and development software available.