Chapter 1 Overview; General - Brainchild P41 User Manual

Chapter 1 Overview

Chapter 1 Overview

1-1 General

1-1 General
The Fuzzy Logic plus PID microprocessor-based profiling controller
series, incorporate two bright, easy to read 4-digit LED displays,
indicating process value and set point value. The Fuzzy Logic
technology enables a process to reach a predetermined set point in
the shortest time, with the minimum of overshoot during power-up or
external load disturbance.
P91 is a 1/16 DIN size panel mount profiling controller. It can also be
used for rail mount by adding a rail mount kit. P41 is a 1/4 DIN size
panel mount profiling controller. These units are powered by 11-26 or
90-250 VDC/VAC supply, incorporating a 2 amp. control relay output
as standard. The second output can be used as cooling control, an
event output or an alarm. Both outputs can select triac, logic output,
linear current or linear voltage to drive external device. The units are
fully programmable for PT100 and thermocouple types J, K, T, E, B, R,
S, N, L, C, P with no need to modify the unit. The input signal is
digitized by using a 18-bit A to D converter. Its fast sampling rate
allows the unit to control fast processes.
There are more functions than the heating and cooling control could be
configured for the controller outputs, these include: up to three alarm
outputs, up to three event outputs and up to two analog retransmission
outputs.
Digital communications RS-485 or RS-232 are available as an
additional option. These options allow the units to be integrated with
supervisory control system and software.
A programming port is available for automatic configuration,
calibration and testing without the need to access the keys on front
panel.
By using proprietary Fuzzy modified PID technology, the control
loop will minimize the overshoot and undershoot in a shortest
time. The following diagram is a comparison of results with and
without Fuzzy technology.
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