Did you know...?
Annual energy savings of 15 - 35% or more are routinely achieved by
Hench Control International Customers. |
What makes the Hench system unique?
There are several important features that combine to make the Hench Modular Refrigeration
Control System unique in the field of industrial refrigeration control: |
1.
|
MODULAR CONTROL |
2.
|
HIGH LEVEL PROGRAMMING
LANGUAGE |
3.
|
COMBINED REFRIGERATION AND
CONTROLS EXPERTISE |
4.
|
ADVANCED CONTROL STRATEGIES |
5. |
SUPERIOR AFTER SALE SUPPORT |
|
|
| 1.1 |
MODULAR
CONTROLLERS |
| Hench Control
Corporation has created a control system that consists of a set of Control Modules that
can be used like building blocks to create a complete Control System. Our unique approach to refrigeration control is to
modularize and standardize the various control functions of an industrial refrigeration
system such as compressors, condensers and evaporators. A Hench Control System consists of
an assembly of individual modules, which independently control their own portion of the
refrigeration system but are part of a network to provide seamless control of the entire
refrigeration system.
Installed on each Module is an appropriate
number of digital and analog input and output modules to control or monitor individual
devices such as motor starters, loaders/unloaders, pressure and temperature sensors.
The advantages of this building block
approach include: |
 |
Smooth and rapid start-ups are ensured by using identical
Control Modules at successive facilities and performing a thorough factory pre-test under
simulated site conditions. |
|
Custom requirements and future modifications to the
refrigeration system are easily accommodated by adding or changing I/O modules plugged
into each Control Module. Each Control Module has an inherent I/O capacity for devices
such as compressors, condensers, blast freezers, pressure sensors, temperature sensors,
ammonia sensors and lights. Existing spare capacity may be activated at any time to
accommodate changing needs. |
|
Additional Controller Modules are easily added as a
facility’s needs grow. If the capacity of a Controller Module is exceeded, the
operator needs only to install an additional appropriate Controller Module and full
control capabilities are realized. Each new Controller Module coordinates with existing
Controller Modules to provide a seamless control system. |
|
Fast system response, sophisticated control capabilities and improved
system reliability is obtained by locating the “brains” of the Hench System
within each individual Controller Module. These fully distributed Controller Modules are
installed nearest to where the data is to be gathered or instructions to be carried out,
substantially increasing speed and the ability to perform intelligent control. |
|
|
| 1.2 |
MICROPROCESSOR BASED |
| The heart
of each Control Module is an Intel microprocessor chip. Each Controller Module is in fact
a computer designed specifically for particular refrigeration control applications. The
Hench System’s Controller Module hardware provides a number of unique advantages: |
|
Control
software is permanently burned into Programmable Read Only Memory (PROM) chips on each
Controller Module. This means that each Controller Module can operate on a stand-alone
basis and independently of the central computer. |
|
Controller
Modules withstand the rigors of extreme conditions and are manufactured to rigid
specifications. The UL/CSA approved Controller Modules feature filters, varistors and
optical isolation to protect the hardware from electrical noise, spikes and other power
impurities. |
|
Each
Controller Module is pre-programmed and completely pre-tested at the factory under
simulated site conditions, confirming components to be in good working order and the
control strategy to be working as desired ensuring smooth start-ups. |
|
The central PC is
available for other tasks or software packages since the Hench System’s vital control
resides in the PROMs and RAM of each individual Controller Module. The PC uses a Windows
XP based operator interface allowing multi-tasking and integration with many
non-proprietary software packages, such as: animated color graphics, data logging,
spreadsheets, auto-dialers and remote communication packages. |
|
|
| 1.3 |
HIGH
LEVEL PROGRAMMING LANGUAGE |
| Use of a
powerful microprocessor permits the control software to be programmed in a high-level
computer language. Utilizing a true computer programming language allows Hench Control to
provide users with superior control capabilities, including: |
|
Sophisticated calculations to improve efficiency such as compressor
power-to-capacity ratios, degree of deviation from setpoints and saturation curves are
performed automatically. |
|
Easy operator customization of advanced control strategies including adding
equipment, altering sequences, changing setpoints, adjusting delays and fine-tuning other
control parameters to best suit specialized or changing needs without reprogramming for
each application. |
|
Operator
selectable parameters are saved to Random Access Memory (RAM) on the microprocessor
allowing quick and easy changes. The microprocessors automatically return to
operator-selected parameters rather than factory defaults in the event of power
disruptions. |
|
|
| 1.4 |
COMBINED
REFRIGERATION AND CONTROLS EXPERIENCE |
| Extensive
research, experience and consultation by Hench Control Corporation within the field of
industrial refrigeration have produced a sophisticated control strategy. |
|
Hench
Control Corporation is a leading independent industrial refrigeration controls
manufacturer with Hench Systems installed across the U.S.A., Canada, South America and
Europe. |
|
Over
20
years of business and the combined decades of experience in refrigeration and controls has
resulted in a superior control system |
|
On-going
feedback from operators, engineers and contractors contributes to enhance a Control System
which currently benefits bakeries; bottling plants; cold storage facilities; cogeneration
plants; produce processors; fast-frozen food plants; wineries; ice rinks and more. |
|
Hench
Control Corporation is independent from equipment manufacturers, ensuring an unbiased
point of view in evaluating control needs and providing a system that is capable of
controlling various makes of equipment together at the same time. |
|
Hench
Control Corporation is a technology leader, having introduced such features as automatic
compressor re-sequencing to load requirements, adjustment of suction pressure with load to
save energy and many more. |
|
New
advanced control features are added each year.
© 2007 Hench Control International
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