Precision Digital PD6080 - Manual (Page 7)

PD6080/PD6081 Super Snooper Modbus Scanner Instruction Manual
7
INTRODUCTION
The P RO V U
®
PD6080/6081 Super Snooper Modbus
®
Scanner is a multi-purpose, easy-to-use digital
scanner that 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. The PD6080 displays in decimal format, while the PD6081 displays in Feet & Inches.
As a master, the PD6080/6081 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 PD6080/6081 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 PD6080/6081s in Snooper mode to read any of the variables
being polled by the master. As a snooper the PD6080/6081 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.
The PD6080/6081 Super Snooper is housed in a 1/8 DIN panel scanner enclosure that features a NEMA
4X front panel. Data is displayed on an adjustable intensity, dual-line, six-digit display. The upper display
is a 0.6 inch, seven-segment LED display, while the lower display digit height is 0.46 inches. The Super
Snooper can be powered from 85-265 VAC or 12-36 VDC. It is available with up to 4 internal relays and is
available with 4 additional relays and up to 8 digital inputs/outputs, as well as a dual 4-20 mA output
expansion module, as options.
The PD6080/6081 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 a Super Snooper Modbus Scanner to be accessed with a computer.
Configure multiple scanners, conveniently monitor critical information, and Datalog right from a PC with
ease, further increasing plant efficiency.