Precision Digital Corporation Helios PD2-6080 Instruction Manual Download

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Helios PD2-6080/PD2-6081 Modbus

Scanners

Instruction Manual

Introduction

The Helios PD2-6080 and PD2-6081 Large Display
Modbus

Scanners are multi-purpose, easy to use,

digital scanners that can be programmed as a
Modbus RTU Master, Slave, or Snooper. They feature
large 1.8 inch superluminous LED digits, which can
be read in direct sunlight from up to 100 feet away,
and are capable of scanning up to 16 variables
generated by any Modbus device. The PD2-6080
displays in decimal format, while the PD2-6081 has a
feet & inches display. They are housed in a water-
resistant, field mountable NEMA 4X/IP65 rated
enclosure for convenient indoor or outdoor
installation.

The programming buttons are located behind the
lower panel door and are not generally accessible
during operation. For that reason, we recommend the
use of the PDA2364-MRUE remote control station
which has four buttons to mimic the buttons behind
the panel.

In master mode, the Helios 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 scanners are capable of polling up to 16 process
variables (PVs) and displaying them in sequence at a
user programmable scan rate. They also allow other
Helios Modbus Scanners in snooper mode to read any
of the variables being polled by the master. As a
snooper, the scanners listen to the Modbus traffic and
pick up a specific register or registers being polled by a
master device from a specific slave device and process
the data being read. In slave mode, they are controlled
by a master device. The data sent to them by the
master is scaled, displayed, and used to operate the
relays and 4-20 mA output.

The Helios PD2-6080 and PD2-6081 come 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 input
signal 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 fully loaded Helios PD2-6080 or PD2-6081 scanner
comes with four SPDT relays, a 4-20 mA output, two
24 VDC power supplies, five digital inputs and four
digital outputs, and RS-485 serial communications.

Free ScanView software allows the Helios Modbus
Scanner to be accessed via a computer. Configure
multiple scanners, conveniently monitor critical
information, and data log right from a PC with ease,
further increasing plant efficiency.

Ordering Information

85-265 VAC Models

Model

Standard
Features

Options
Installed

Decimal Display

PD2-6080-6H0

5 Digital Inputs,
4 Digital Outputs,
RS-485
Communications

No options

PD2-6080-6H7

4 relays
4-20 mA output

Feet & Inches Display