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OVERVIEW
The DataDOC is a product that utilizes the digital control channel
on the Cellemetry network to transfer remote readings from the oil
and gas field directly to you, via the Internet. A common protocol
over a serial interface allows the device to gather operational data
from flow computers, PLCs, compressor control panels, etc.
Data readings may either be transmitted at preset times, demand
polled, or delivered as exception based alarms. The eLynx web
interface completes the package by providing secure access to your
data summaries, reports, alarm administration, and trend tools. |
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FEATURES
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Compatible with most major brand flow
computers:
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Totalflow
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Flow Automation
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Halliburton
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Bristol
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Compatible with Murphy and Altronic compressor
control panels
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Instantaneous exception based alarming from data
value threshold or discrete input
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Control via the Internet
Configurable pulse counter
BENEFITS
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Wireless communications utilizing existing
infrastructure (no need to install towers, phone lines, obtain
radio licenses, etc)
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Coverage throughout the U.S., Canada, Mexico,
and parts of south America
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Easy to set up
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Simple installation
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Low cost of ownership
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Centralized data management
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Dependable service
SPECIFICATIONS
PHYSICAL
Size: 5.75" L x 4.00" W x 1.5" H
Weight: 1.0 lb.
Lights: Power, Alarm, Registration, Signal
Connectors:
Power - Phoenix PCB
D/I, D/O - Phoenix PCB
Radio - SMA Female
RS-232 - 9-pin "D"
Temperature:
-30 C to +60 C
ELECTRICAL
The DataDOC is configurable for a number of
different operating modes. Each of which has an associated power
requirement that is ultimately determined by the customer.
Input: 12 VDC Nominal
High end operating Approx. 75 ma
Low end operating Approx. 9 ma
Transmit: Instantaneous 1500 ma
PRINCIPLE OF OPERATION
The DataDOC interrogates data values from its
slave device, (flow computer, PLC, control panel), using one of
the several variations of modbus protocol. A three-wire RS-232
connection is used to establish the link between the two devices.
Under normal conditions, readings are collected just prior to
being reported. The data values are then loaded into a specified
message structure and transmitted. Typically, two data values with
12 bits resolution each are transmitted in a single message.
An optional message is available for an extremely large number,
and provides 26 bits resolution.
ALARMING IS ANOTHER FEATURE OF THE DEVICE.
When alarming is enabled, values are interrogated
once every hour, 15 minutes, 5 minutes or continuously. This
allows the device to compare the actual values to configurable
thresholds. If an alarm condition is detected, it is
immediately transmitted through the Cellemetry network to eLynx's
central data handling facility. A notification is then sent out to
the customer's e-mail, alphanumeric pager, or text messaging cell
phone.
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