DeviceNet
™ Control Engine
A Dynamic Force in
IndustrialAutomation
Trunk TerminationResistors Pages 40-41 Trunk Diagnostic Tee Pages 32-33 Power Taps Pages 72-73
and
Trunk Drop Tee Pages 30-31
Controls
Pages 24-25 Power Supply Trunk Double-Ended
Cordsets Molded
Din connector See Brad Harrison
® Designer’s Guide Auxiliary Power
Cordsets Pages 66-67 Machine Stop Tees Pages 70-71 Power Supply E-Stop Pushbutton
BRAD
® AND DEVICENET
Through its leading product lines Brad Harrison
® , mPm
® , SST
™ and applicom
® , Brad automation products give the designer and users of aDeviceNet
™ system a complete Communication and Connectivity solution – from scanner through media infrastructure to I/O connection. Noother supplier provides a comprehensive backbone of connectivity while giving you the power to choose other elements of the control system.You select which control engine you want, whether it be PC or PLC-based; Brad gets you onto the network. You choose which control architec-ture – centralized or distributed – which makes the most sense. You choose which type of industrial motor controllers, valve banks or sensors you want;Brad insures connectivity to all these devices. Brad products can be your provider of DeviceNet connectivity from control engine to sensor.
Industrial scanners The scanner resides in a controller whether it is a PLC or PC, and
provides a network connection. The scanner exchanges a data table,
which is loaded with the various values of the inputs and outputs, with the
logic controller to solve the various logical expressions. Simultaneously the
operation of the master and/or slave protocols is completed. The logical
expressions are then re-exchanged with the data table for communication
out to the various nodes and I/O residing on the network. The scanner
generally supports all standard baud rates of the network.
COMPONENTS AND ELEMENTS OF DEVICENET SYSTEM
Control Engine PC “soft controllers” or
Plcs can act as the main control engines, taking
the current I/O status off the network and solving these operations through
the main control program. The new status of the I/O is then updated via
the network interface to the
industrial actuators, starters and interface panels.
Many times a central control engine acts as the DeviceNet “master” which
initiates and controls many of the messaging sequences of the network.
8
For product & technical information visit www.woodhead.com/eCatalog