WEG SSW-06 Fieldbus Communication Manual

Soft-Starter SSW-06 Characteristics on Fieldbus Network
SSW-06 | 7
2 SOFT-STARTER SSW-06 CHARACTERISTICS ON FIELDBUS
NETWORK
The Profibus DP, DeviceNet, EtherNet/IP and PROFINET networks, as well as other industrial communication
networks, as they are exposed to harsh environments and to high electromagnetic interferences, require some
cares that should be adopted in order to prevent high number of communication errors during the operation.
Please find below some characteristics of the Soft-Starter SSW-06 on these networks, as well as some hints on
how perform its connection to the communication network.
2.1 PROFIBUS DP NETWORK
The term Profibus is used for describing a digital communication system that can be used is several application
areas. The system is a standard open system defined by the standards IEC 61158 and IEC 61784, comprising
both the used physical means and the data profile for determined equipment sets. In this system, the DP
communication protocol was developed aiming at to achieve a quick, cyclic and deterministic communication
between masters and slaves.
Among the different communication technologies that can be used in this system, the Profibus DP technology
describes a solution that comprises typically the DP protocol, the interface RS-485 and application profiles used
mainly in applications and equipments for the automation of manufacturing processes.
Currently there is an organization designated as Profibus International, responsible for maintaining, updating and
communicating the Profibus technologies between the users and members. For more details about the
technology, as well as complete protocol specification, please refer to this organization or to any organization
linked to the Profibus International (http://www.profibus.com)
.
2.1.1 Transfer Rate (Baud Rate)
The Profibus DP protocol defines several communication baud rates that can be used. The supported baud
rates are 9.6 Kbit/s to 12 Mbit/s. The maximum allowed transmission cable length depends on the used baud
rate, as shown in Table 2.
Table 2: Baud rate and allowed cable length
Baud Rates
[kbit/s]
Allowed Cable Length [m]
9.6; 19.2; 45.45; 93.75
1200
187.5
1000
500
400
1500
200
3000; 6000; 12000
100
The Soft-Starter SSW-06 communication board is fitted with an automatic baud rate detection system and
operates according to the configuration of the network master, thus not requiring additional configuration for this
option.
2.1.2 Addressing
The Profibus DP protocol allows the connection of up to 126 network devices between the masters and slaves,
starting from address 0 (zero) up to address 125 (addresses 126 and127 are reserved). Each network device
must have a different address.
The Soft-Starter SSW-06 is fitted with two rotary switches which allow selecting the address of the Profibus DP
network between 0 (zero) and 99. The drive address is formed by the composition of the values of these
switches, where the left rotary switch (near the Profibus connector) indicates the decimal digit, whilst the right
rotary switch (near the indication LEDs) indicates the unit digit.

WEG SSW-06 Specifications

General

Brand	WEG
Model	SSW-06
Category	Controller
Language	English