Hardy HI 3010 Filler/Dispenser Controller - Manual (Page 17)

3 Communications
Installation & Operation
EtherNet/IP™
EtherNet/IP, short for Ethernet Industrial Protocol, is an
open industrial networking standard that takes advantage of
commercial, off-the-shelf Ethernet communication chips and
media. Ethernet technology, enables the user to access
device-level data from the Internet.The Ethernet/IP network-
ing standard supports both implicit messaging (real-time I/O
messaging) and explicit messaging (message exchange).
EtherNet/IP is an open network that takes advantage of com-
mercial technology that already exists.
TCP/IP is the transport and network layer protocol of the
Internet and is commonly linked with all Ethernet installa-
tions and the business world. TCP/IP provides a set of ser-
vices that any two devices can use to share data. Because
Ethernet technology and standard protocol suites such as
TCP/IP have been published for public use, standardized
software tools and physical media have been mass-produced
and are readily available, offering you the benefits of known
technology and accessibility. The UDP/IP (User Datagram
Protocol) is also used in conjunction with the Ethernet net-
work. UDP/IP provides fast, efficient data transport required
for real-time data exchange.
FIG. 2: ETHERNET/IP™ NETWORK
NOTE: EtherNet/IP™ is a trademark of Rockwell Auto-
mation Inc.
Allen-Bradley Remote I/O
Allen-Bradley License
Under license from The Allen-Bradley Corporation, Hardy
has developed a Remote I/O Interface for the HI 3000 Series
products.
Hardy Process Solutions worked with substantial customer
input and Allen-Bradley to identify and design the remote I/
O communications network which best matched the needs of
system integrators and end users for industrial and process
applications. The interface is fast, field proven, requires min-
imal wiring, requires no special software drivers, and is stan-
dard on many Allen-Bradley programmable controllers.
Setting each address and baud rate in the instrument, con-
necting three wires, and writing some ladder logic is all that
is needed to begin communicating weighing parameters to
and from an HI 3000 Series controller.
Each Hardy HI 3000 Series represents a quarter (1/4) rack of
discrete I/O (32 bits in the PLC Output and Input image
files) to the scanning PLC and supports both discrete and
block transfers. The PLC continually exchanges 32 bits of its
PLC Input Image Table and 32 bits of its Output Image Table
with each 1/4 rack device. In a 1771 I/O Rack, these bits
would normally be transferred from and to discrete input and
output modules. For the weight controller, the Output Image
bits are used to send commands to the weight controller and
the Input Image bits return weight data and scale status bits.
These actions are referred to as “discrete writes and “discrete
reads”. The user is also able to exchange blocks of data with
a 1/4, 1/2, 3/4, Full rack device via Block Transfer instruc-
tions in the PLC ladder logic program. These commands are
referred to as “block writes” and “block reads”.
The host programmable controller can access all configura-
tion and weighing parameters in an HI 3000 Series Instru-
ment, including performing scale calibration. The HI 3000
Series module can be used as a local display and keyboard
for weighing parameters, or function as a blind controller
properly digitizing the load cell signal and providing respon-
sive setpoint control.
Using the Remote I/O interface shortens development time
and provides the most functional weighing interface avail-
able for your Allen-Bradley programmable controller.
Before starting system design, you should also read the
Installation and Operation manual of the HI 3000 Series.
Information contained in this manual is subject to change.
Always check the latest version of this manual at our web
site (http://www.hardysolutions.com) before beginning sys-
tem design. This product incorporates technology which is
licensed by Allen-Bradley Company Inc. Allen-Bradley
does not technically approve, warrant or support this prod-
uct. All warranty and support for this product is provided by
Hardy. PLC
®
, PLC-2
®
, PLC-3
®
, PLC-5
®
, SLC500
®
Series
are registered trademarks of the Allen-Bradley Company,
Inc.
Common Applications
The HI 3000 Remote I/O can be used in conjunction with
Allen-Bradley programmable controllers to tackle a variety
of process control needs. The most basic use of the interface
is to simply allow the programmable controller to read
weight data from one or more HI 3000 Series weight control-
lers. In addition to reading weight some other applications
are:
• Filling
• Dispensing
• Batch Weighing Control
• Monitoring Rate of Flow