VDAC (Verified Data Collection System)

"When every record matters"

Verified Data Collection

- Bi-directional confirmation of each record

Error detection / correction

- Checksum/CRC calculations confirm data arrived intact

Closed loop communication

- Field device does not remove record until VDAC says it is stored

Three levels:

VDAC I

Data collection into standard file formats
Database formats, flat file, comma delimited, fixed record length
Excel, ODBC, SQL Server, Oracle, DB/2
Allows export to AS/400, UNIX, and other platforms
Collect via serial RS-232, RS-485, modem, Ethernet

VDAC II

VDAC I features plus
OPC Server
DDE Server

VDAC III

VDAC II features plus
Fieldbus gateway
DeviceNet, ControlNet, AB/Ethernet, DH+
Profibus, Modbus+, Ethernet/IP, Interbus
Raw socket server
TCP/IP over Ethernet, WAN, leased line

The VDAC - Verified Data Collection System - is a closed-loop data collection utility which will record ASCII data received via RS-232 on a Windows 2000/XP based computer to a data file. This file can be opened and used by other programs.

Unlike most data collection utilities on the market, VDAC uses bi-directional, check-sum based protocol with the sending client, to verify that each data record is received and stored error free prior to requesting the next record from the client.

The VDAC main window will show the name of the current data file, the number of records received since startup, and the most recent data strings received by the system. The screen can remain maximized or it can be minimized to allow the system to continuously collect data while working in another application.

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