4 Serial Modbus Channels

Overview

The BradCommunications

ControlLogix

communication channels that act as independent Modbus Master or Slave protocols

to exchange data with other Modbus compatible devices.

The SST module acts as a 1756 input/output module between the Modbus network

and the ControlLogix backplane. The data transfer from the SST

ControlLogix processor supports 2 modes; a direct mode allowing mapping of

Modbus data in I/O processor image (496 inputs bytes / 496 output bytes) and a

messaging mode (based on CIP transaction) allowing access to Modbus data

images stored in 32K registers of the SST

The SST module has a USB port on the front panel which can be used for the

startup of the module when the user configuration is stored to a USB key. This can

also be beneficial if a breakdown occurs, allowing a very quick startup to occur with

a new SST module.

Configuration and Diagnostics

Save your time, the SST module doesn’t require any ladder logic programming to

be used. The configuration is created using a PC-based Windows console software

connected via RLL (Remote Link Library) functionality allowing a remote access to

the SST module for the configuration and the diagnostics through Rockwell network

architectures (Ethernet/ControlNet/DeviceNet

The SST console allows the user to define the network parameters, Modbus

devices and the cyclic data exchanges. The console includes a user configuration

manager offering services for download, upload, copy, and rename of user

configurations. With this, a user can very easily and quickly create a new

configuration to initialize and start a SST module.

The SST console includes diagnostic tools to help with the commissioning and

monitoring of the Modbus connection. These tools allow access in read and write

modes to the Modbus slaves or to monitor and modify the module’s internal data

shared bound for a Modbus Master. Thus, the user-friendly tools are available for

controlling the communication in commissioning phase (PROG mode). This same

information is also available in production (RUN mode) through status words

making it possible for the user to manage the execution of the control application in

its ladder logic.

controller with up to distinct Serial Modbus Master/Slave

networks.

Features

Save money!

4 RS232/RS485 Serial Modbus

channels on a single slot - 1756

backplane compatible

Save time!

No ladder logic to write for

configuration and data transfer

between module and

ControlLogix processor

Boot user configuration and

update firmware module through

integrated USB port

Data format: Bit, Byte, Word,

Dword, Float

RLL feature : configure and

diagnose Modbus network

Advanced Windows configuration

and diagnostics tools

Up to 8 SST™ modules can be

used in one ControlLogix rack

Support local and remote

chassis

Protocols

Modbus Master (RTU / ASCII)

Modbus Slave (RTU / ASCII)

Typical Applications

SCADA / supervisory

communication

Integration of legacy Modbus

devices

Modbus data concentrator

Bridge Rockwell networks to

Modbus compatible devices

09 Apr. 08

DW2007212