Siemens MICROMASTER 411 - Manual (Page 149)

Issue 03/01 10 Engineering Information
MICROMASTER 411 & COMBIMASTER 411 Operating Instructions
6SE6400-5CA00-0BP0 149
10.14 PROFIBUS Module
This option allows the MICROMASTER 411/COMBIMASTER 411 to be controlled
via a PROFIBUS-DP serial bus (SINEC L2-DP).
PROFIBUS-DP is a cost-effective high-speed serial communication system
optimized for the actuator/sensor area where very short system reaction times are
critical. It operates as a decentralized I/O system whereby the traditional wiring to
sensors and actuators is replaced by an RS485 serial bus system linking the
stations together.
The suitability of the system for such applications has been enhanced by an
extension of the bus speed up to 12 MBd. Protocol is defined as DIN19245 and
also as EN50170 guaranteeing open, multi-vendor communications between
PROFIBUS-DP stations.
Up to 125 stations can be networked together using this single bus system and a
very flexible data structure allows the system to be optimized to exactly match the
requirements of each device.
PROFIBUS-DP lies at the heart of the new generation of SIMATIC S7 automation
systems offered by Siemens. Using this single bus system, all engineering,
visualization and PLC control operations can be integrated. To configure a
SIMATIC based automation system, all that is required is the associated STEP7
configuration tool running on a PC. Bus configuration is performed by using a drag
and drop technique in a graphically displayed PROFIBUS-DP network.
10.14.1 Features of PROFIBUS Module
Permits fast cyclic communications via a PROFIBUS connection.
Supports all PROFIBUS baud rates up to 12 MBd.
Control of up to 125 inverters using PROFIBUS-DP protocol (with repeaters).
Conforms to EN50170 guaranteeing open communications on a serial bus
system. It can be used with other PROFIBUS-DP/SINEC L2-DP peripheral
devices on the serial bus. Data format conforms to the VDI/VDE directive 3689
“PROFIBUS Profile for Variable Speed Drives”.
Acyclic communications channel for connecting SIMOVIS or other service
tools.
Support for the PROFIBUS control commands SYNC and FREEZE.
Can be easily configured using the S7 Manager software, or any proprietary
PROFIBUS commissioning tool.
Simple integration into a SIMATIC S7 PLC system using specially designed
software modules (S7).
Module can be powered by external +24 V Power Supply if required.
No separate power supply necessary.
Digital and analog inputs can be read and digital output is controlled via the
serial bus.
5 msec response time to process data.
Output frequency (and therefore motor speed) can be controlled locally on the
drive or over the serial bus.
Multi-mode operation possible, whereby control data can be input via the
terminal block (digital inputs) and setpoint over the serial bus. Alternatively, the
setpoint can be from a local source (analogue input) with the drive control over
the serial bus.
Inverter parameters are accessible over the serial link.