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CUSTODY TRANSFER SYSTEMS USING MAXIFLEX
12 May 2003 - Omniflex
| They require no user application programs when used for data acquisition or telemetry application making them the ideal equipment for this type of system.
Simply plug them in; connect field wiring and power up. All I/O is scanned automatically and I/O status assembled into the Data Interchange Table. |
The recently launched T2 Maxiflex CPU is designed specifically for data acquisition and telemetry applications like custody transfer systems. They require no user application programs when used for data acquisition or telemetry application making them the ideal equipment for this type of system.
Simply plug them in; connect field wiring and power up. All I/O is scanned automatically and I/O status assembled into the Data Interchange Table. Using a technique called 'Network Subscriptions' (the same idea as subscribing to a magazine from the Newsagent) the data at either end of the custody transfer system can share the data between themselves. This is done on time interval basis for analogues and change of state for digitals.
This is achieved without writing one line of program code. Maxiflex is configured using a Windows based Configuration Management Package which edits the Maxiflex DIT table and invokes the Network services necessary to implement the data transfer between either end of the custody transfer system.
These configuration files can be saved and stored on the PC/Laptop. Configuration can be done at the unit itself or via the Network, which is especially useful when access to the other end of the system is difficult. These tools also facilitate browsing of the system for engineering staff.
The system integrates the required parameters of a custody transfer system together.
Being Modular and flexible Maxiflex can accommodate systems with primitive front end instruments right up to sophisticated measurement devices with on board communications ports, such as RS232/RS485, Modbus, Hart, Ethernet.
Maxiflex has been used with simple pulse output metering to sophisticated devices or even analytical equipment fitted to pipelines. The telemetry aspect of the custody transfer system is often the most crucial and difficult element, Maxiflex Networks can be implemented on copper cable (Screened twisted pair - Instrument cables) up to 10km between the custody transfer measurement points. Radio systems can be used for wireless applications where cable infrastructure is non-existent or cabling costs are prohibitive. Other Network Media such as Fibre Optic cable can also be used. Configuration is easily made using a free Windows based software package called 'OmniSet', and a serial cable available from Omniflex. Additional Configuration Management packages which are more 'feature rich' are also available to cater for the needs of the end user system. Simple selection of pull down options allows the user to configure the CPU completely. This configuration includes the ability to create multi-drop telemetry systems using the Omniflex CONET Local Area Network up to 10km on twisted pair cable.
Maxiflex provides a very cost-effective solution to custody transfer applications and simplifies the field I/O systems by eliminating the need to write time-consuming application programs for Data Acquisition or Telemetry. Should some control be required this can be integrated within the system as an application program. Maxiflex I/O systems cover Analogue Inputs, Voltage, Current, Thermocouple, RTD and Digital Inputs, potential free and voltages up to 200Vdc, series contact chains, pulse inputs up to 50kHz. Many Flow Meters have HART protocol on board and this can be wired directly into the Maxiflex System via a Hart Network Interface module. This has the benefit of allowing the entire spectrum of data on the flow meter to available to the system. Integration into commercial systems for billing purposes is easily achieved from PC systems and all network data can be made available through the use of Windows operating system OPC servers to which the commercial systems become clients to retrieve the data.
http://www.omniflex.com
About: Omniflex
OMNIFLEX designs and manufactures electronic products and systems for the automation and control industry worldwide, specialising in industrial networking, remote I/O systems, process automation systems, signal conditioning, and alarm and event management.The company was founded in 1965 in South Africa and was originally named CONLOG, developing expertise in systems integration and product development for the process control and instrumentation market. The company's products are now sold on 5 continents and include such well known brands as OMNI16 alarm annunciators, MAXIFLEX process automation and remote I/O systems, and OMNITERM signal conditioning and RTU systems.
History.
Over the early years the company, under the CONLOG brand, grew to become the largest manufacturer of instrumentation for the process control industry in Africa and became a well respected designer and manufacturer of innovative products and systems of superior quality. In 1997 the CONLOG industrial products business was acquired by the present owners and the name of the company changed to OMNIFLEX. OMNIFLEX owns all of the intellectual property rights for the entire range of industrial products sold under the CONLOG brand and provides full technical and service support for all these products sold over the past 38 years. OMNIFLEX continues to market these products under the OMNIFLEX brand and continues to invest in research and development to maintain its state-of-the-art technology base.
Mission.
OMNIFLEX has as its core business, the design and manufacture of industrial automation electronic products and systems. OMNIFLEX has as its strategy the ongoing investment in research and development of electronic products for the control and instrumentation market globally. As a world-wide supplier of automation products, OMNIFLEX provides technical training, backup and application engineering support to a variety of locally based distributors and value adding re-sellers in order to provide superior levels of technical assistance to system integrators and end users in their own environment. |
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