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P a r r I n s t r u m e n t C o m p a n y
from remote locations becomes possible. This
type of connectivity offers unique possibilities,
for example, related to remote diagnostics and
system troubleshooting.
Three Models Available
Parr 4871 Process Controllers are available
in three different models to cover a wide range
of applications. The 4871A will accept four I/O
modules (typically up to 36 inputs and outputs).
The 4871B will accept up to eight I/O modules,
and the 4871C will accept up to 12 I/O modules.
If more than 100 inputs and outputs are required,
multiple controllers can be linked.
Flexible, Powerful Software
In most laboratory and pilot plant applica-
tions, a PC will be used for the operator
interface. For plant or production applications,
an industrial type user interface box with a color
graphic LCD is available.
SpecView SCADA Sofware
SpecView describes their product as
“Software for people with other jobs”. That
seems to be an excellent description of this soft-
ware package used with the 4871 Controller to:
• Configure the control package
• Develop the graphical screen layout
• Establish the data logging profiles
• Prepare custom reports
• Create bar graphs
• Generate time trend graphs
• Monitor alarms
• Create flexible recipes
• Retrieve and replace logged data
• Operate the reactor system(s).
The full software package, not just a run-time
version, is supplied with the 4871 Controller so
operators can enhance their system as they get
familiar with it or expand/change their applica-
tions. Download a demo at
Graphical User Interface
An integral part of the Honeywell Controller
is the hybrid control designer software. This is
the “Drag and Drop” software that enables Parr
to rapidly establish the controller’s internal logic
and adapt it to individual systems requirements.
The user can employ this same software to
change or enhance the fundamental logic of the
controller as additional components are added
to the system or as functions need to change.
Current Industrial Standards
Modbus, Ethernet, auto-tuning, fuzzy logic,
auto-configuring Man Machine Interface (MMI),
supervisory control and data acquisition
(SCADA), multi-loop control; these are a few
of the terms and capabilities designed into the
hardware and software incorporated into the
Parr 4871 controller.
This is a very modern and powerful package
that enables us to offer turnkey systems ready
to run within weeks of order at very attractive
prices compared with custom programmed
systems previously available.
PC Requirements
The PC used with the 4871 serves several
functions. It is the operator’s user interface for
controlling the process. It also logs all of the
operating data generated during a process run.
It can also store multiple setups for rapid transfer
to the 4871 Process CPU.
Any modern PC with current Windows operat-
ing system can be used with these controllers.
It is important to note that the control of
the process always resides within the 4871
Controller, and not in the PC itself.
Power Controller
Parr designs, builds and furnishes power
controllers to adapt the analog and digital out-
puts from the 4871 Controllers to the reactors or
systems being controlled. These power control-
lers handle all of the high current power circuits
so that the control circuitry is isolated from these
loads. This also makes it possible to install the
controller in a control room some distance from
the system being controlled.
Screenshot from remote PC showing logged data in Data Logging Mode.
4871 Process Controller
