FP4, FP4W
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3 GENERAL PRODUCT OVERVIEW
3.1 Purpose
FP4/FP4W is a versatile, modern and precise flow totalizer with internal data logging.
The device is used in industry and in the supervision of production lines. Equipped with
two analogue inputs (RTD, 0-20mA or 4-20mA,
±10V) and two PULS type inputs
(frequency measurement, pulse counting, binary signal tracking and recording) can
measure flow and other values, such as temperature and humidity. In addition FP4/FP4W
has two math channels and two totalizers assigned to each of the six available channels.
Device can communicate with master system through Ethernet port (Modbus TCP
protocol, web server) or through RS-485 port (Modbus RTU protocol) and can work in
distributed control systems.
The FP4 device is supplied from 24 VDC source, while the FP4W device is supplied
from 230 VAC source. Detailed information concerning the power supply is given in
consecutive parts of the document, in section
power supply connection
.
3.2 Basic functions
Measurement of the process values
The device is equipped with 4 measurement inputs: two analogue type (0/4-20mA,
R/RTD, U) and two PULS type. Each inputs is assigned to appropriate channel.
Math channels
Within the math channels, selected mathematical operations are available: addition,
subtraction, division and multiplication (based on the measured values, according to the
formulas entered by the user). There are two available math channels.
Flow measurement
Each measurement input (including binary inputs) and each calculated value have two
independent totalizers assigned. Totalizers for pulse inputs can provide precise pulses
count. In addition, the operating time of each totalizer is recorded.
Alarms and control
Two alarm thresholds may be set for every channel. Binary outputs can be assigned to
alarm thresholds. Two modes are available for alarms: latched
(‘Alarm’ mode) and
non-latched
(‘Control’ mode). 4 relay outputs are available.
Analogue output
One 4-20 mA output is available, enabling retransmission of the selected channel
value (also math channel value).
Results recording
Process values, math channels, totalizers and timers (operating time of totalizers) can
be recorded into internal flash memory with the capacity of 2 GB. Data are saved as text
files and protected with encoded checksum. Apart from the measured values, the device
also saves events (power loss, resetting, exceeded threshold values, etc.) and authorised
operations.
