Lenze 931W - Manual (Page 6)

Preface
Introduction
1
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6 K-HB 13.0001-EN 2.1
1 Preface
1.1 Introduction
The competitive situation in the mechanical and system engineering sector requires new
means to optimise the production costs. This is why modular machine and system
engineering is becoming increasingly more important, since individual solutions can now
be set up easily and cost-effectively from a single modular system.
Lenze fieldbus systems in industrial applications
For an optimal communication between the single modules of a system, fieldbus systems
are increasingly used for process automation. Lenze offers the following communication
modules for the standard fieldbus systems:
ƒ Profibus DP
ƒ CANOpen
Decision support
The decision for a fieldbus system depends on many different factors. The following
overviews will help you to find the solution for your application.
Profibus DP
For bigger machines with bus lengths of more than100 metres,INTERBUS orPROFIBUS-DP
(PROFIBUS-Decentralised Periphery) are frequently used. The PROFIBUS-DP is always used
together with a master control (PLC) – here the PROFIBUS master transmits e.g. the
setpoints to the single PROFIBUS stations (e. g. Lenze controllers).
When using the data transfer rate of 1.5 Mbits/s typical for the PROFIBUS-DP, the sensors
and actuators receive the process data. Due to the data transmission mode and the
telegram overhead, a bus cycle time results at 1.5 Mbits/s, which is sufficient to control
e. g. conveyors. If, for technical reasons, the process data must be transmitted faster to the
sensors and actuators, the PROFIBUS can also be operated with a data transmission rate
of maximally 12 Mbit/s.
CANOpen
CANopen is a communication protocol specified to the CiA (CAN in Automation) user
group. Lenze can provide communication modules for communicating with CANopen
masters. These modules are compatible with the specification DS 301 V4.01.