ProtEX PD8-6080/PD8-6081 Explosion-Proof Modbus
®
Scanner Instruction Manual
5
Introduction
The ProtEX-MAX PD8-6080 Super Snooper Modbus
®
scanner offers all the functionality of the
ProVu PD6080 as a fully FM, CSA, ATEX, and IECEx approved explosion-proof product.
I
t can
be programmed as a Modbus RTU Master, Slave, or Snooper. It is capable of scanning up to 16
variables generated by any Modbus device, which makes it ideal for tank level monitoring and
control. Its superluminous LED digits make it easily readable in smoke, dust, fog, and, with the
optional SunBright® display, even direct sunlight. The PD8-6080 displays in decimal format,
while the PD8-6081 displays in Feet & Inches.
As a master, the PD8-6080/1 reads up to 16 slave devices, scales the data from each, displays
the result, and operates the internal relays and 4-20 mA output. The PD8-6080/1 in Master
mode is capable of polling up to 16 process variables (PVs); it displays all the enabled PVs in
sequence, at a user programmable scan rate; it also allows other PD8-6080/1s in Snooper
mode to read any of the variables being polled by the master. As a snooper, the PD8-6080/1
listens to the Modbus traffic and picks up a specific register or registers being polled by a
master device from a specific slave device and processes the data being read. As a slave, it is
controlled by a master device. The data sent to it by the master is scaled, displayed, and used
to operate the relays and 4-20 mA output.
Data is displayed on an adjustable intensity, dual-line, six-digit display. Its superluminous LED
digits make it easily readable in smoke, dust, fog, and direct sunlight. The upper display is a 0.6
inch, seven-segment LED display, while the lower display digit height is 0.46 inches. The
scanner can be powered from 85-265 VAC or 12-36 VDC. It is available with up to 4 internal
relays and 4 digital inputs/outputs.
The PD8-6080/6081 comes equipped with dual analog input channels (4-20 mA and/or 0-10
VDC) for use in Master Mode. These can be assigned to mA or volts by mapping a PV to the
internal scanner addresses 256-259, depending on the desired function.
Various math functions may be applied to the Modbus and analog inputs including addition,
difference, absolute difference, average, weighted average, multiplication, division, minimum,
maximum, draw, ratio, and concentration. This is in addition to the signal input conditioning
functions (linear, square root, programmable exponent, or round horizontal tank calculations).
The displays, relays, and the analog outputs may be assigned to PVs or to math channels C1,
C2, C3, or C4. The digital inputs/outputs can be custom-programmed for specific operations. A
digital input (F4) is standard.
Free ScanView software allows the Modbus Scanner to be programmed directly from a PC
using the onboard USB connection. Configure multiple scanners, conveniently monitor critical
information, and Datalog right from a PC with ease, further increasing plant efficiency.
