Hardy HI 3010 Filler/Dispenser Controller - Manual (Page 16)

HI-3000 Series 2
Operation and Installation
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.
ControlNet
ControlNet enables multiple controllers to control I/O on the
same wire and permits multicast of both inputs and peer-to-
peer data, reducing traffic on the wire and increasing system
performance. (See Fig. 1)
FIG. 1: CONTROLNET ARCHITECTURE
ControlNet is highly deterministic and repeatable. These are
important requirements to ensure dependable, synchronized
and coordinated real-time performance. Determinism is the
ability to reliably predict when data will be delivered, and
repeatability ensures that transmit times are constant and
unaffected by devices connecting to, or leaving, the network.
These capabilities are further enhanced with user selectable
I/O and controller interlocking update times to match appli-
cation requirements.
ControlNet meets the requirements of real-time, high speed
applications at the Automation and Control Layer and inte-
grates complex control systems such as batch control sys-
tems, weigh process control systems and systems with
multiple controllers and human-machine interfaces.
Profibus
The Profibus-DP Communication Profile is designed for
efficient data exchange at the field level. The central automa-
tion devices, such as PLC/PC or process control systems,
communicate through a fast serial connection with distrib-
uted field devices such as I/O, drives and valves, as well as
measuring transducers. Data exchange with the distributed
devices is mainly cyclic. The communication functions
required for this are defined by the basic DP functions in
accordance with the EN 50 170 standard. In addition to these
basic functions, DP also offers extended acyclic communica-
tion services for the parameterization, operation, monitoring
and alarm handling of intelligent field devices. Loading the
*.GSD file and setting the Node Address and Input and Out-
put Sizes is all you need to begin communicating weighing
parameters to and from an HI 3000 Series controller to a
PLC, PC or DCS system controller.
MOD-Bus/TPC/IP
TCP/IP is the common transport protocol of the Internet and
is actually a set of layered protocols, providing a reliable
data transport mechanism between machines. Ethernet has
become the de facto standard of corporate enterprise systems
and it has also become the de facto standard for factory net-
working. Ethernet has matured to the point that the cost of
implementing this network solution has been dropping to
where its cost is commensurate with those of today's field-
buses. Using Ethernet TCP/IP in the factory allows true inte-
gration with the corporate Intranet and MES systems that
support your factory.
Combining a versatile, scaleable, and ubiquitous physical
network (Ethernet) with a universal networking standard
(TCP/IP) and a vendor-neutral data representation (MOD-
BUS
®
) gives a truly open, accessible network for exchange
of process data. It is also extremely simple to implement for
any device that supports TCP/IP sockets.
Simplicity: MODBUS
®
TCP/IP simply takes the MOD-
BUS
®
instruction set and wraps TCP/IP around it. If you
already have a MODBUS
®
driver and if you understand
Ethernet and TCP/IP sockets, you can in short period of
time, have a driver up and running and talking to a PC.
There are no exotic chipsets required to be purchased from
vendors, and you can use standard PC Ethernet cards to talk
to your implemented device. As the cost of Ethernet falls,
you benefit from the price reduction of the hardware, and as
the performance improves from 10 to 100 Mbit and soon to 1
Gbit, your technology moves with it protecting your invest-
ment.
NOTE: Mod-BUS
®
is a registered trademark of Sch-
neider Automated Inc.
OPC
OLE for Process Control (OPC) enables an HI 3000 module
to communicate with any device that supports OLE/COM.
The architecture is designed to utilize the Microsoft distrib-
uted OLE technology (DCOM) to facilitate clients interfac-
ing to remote servers.