Application Notes

Responsive and flexible STARDOM is well fitted in new applications and well integrated IT technology and YOKOGAWA DCS expertise.

Fully Integrated Modbus Communication Functions on STARDOM PLC/RTU

STARDOM Field Control Node (FCN) autonomous controllers allow both Modbus master and slave functions to run simultaneously.

The NFLR121 FCN serial communications module has two ports for either RS-422 or RS-485 communications, and each can be configured as slave or master. By installing two of these modules, the second module is made to be a backup.

Reduced installation costs
Simplified system configuration
Increased system reliability

Two-way Communication Feature of FOUNDATION fieldbus

Gas flow data calculated by an RTU can be sent back to a transmitter using the two-way communications capability of FOUNDATION fieldbus.

FOUNDATION fieldbus technology enables all-digital, two-way communications between field devices and control systems. While the advantages of using digital communications for sharing maintenance-related device information with an asset management system are well known, there are other benefits from using the FOUNDATION fieldbus technology. This paper introduces an application that relies on the two-way communications capability of FOUNDATION fieldbus.

Reduced total cost of ownership (TCO) by eliminating the need for local display panels.

Yokogawa provides controller embedded flow calculation library based on AGA (American Gas Association) reports.

In the gas metering skid of pipeline, gas compensation equations is used to execute the correction for compressibility and super compressibility and to get compensated flow at normal, standard or reference pressure and temperature.

Eliminates cost for flow computer
A quick response to I/O and fast calculation result
Storing daily data on non-volatile flash memory for 35 days
Easy integration with SCADA or Local display

Integration of Real-time Utility Monitoring with a DCS

The discharge of improperly treated industrial chemicals and fuel gas can have a major impact on the environment, posing a serious threat to public health. Concurrent with the global growth of manufacturing operations to keep pace with market trends, many countries are taking measures to deal with environmental problems.

The waste treatment facilities and main plants integration, achieved with the new "Integrated Operation" system architecture, contributes toward the reduction of factory related pollution with following benefits:

Blind spots eliminated
Reduced risk of uncontrolled discharge of industrial effluents
Agile action to the frequent utility revamps
Reduced capital expenditure (CAPEX) for utility revamps
Reduced training time

To make the most of the advantages of GPRS, Yokogawa's STARDOM FCN/FCJ intelligent RTUs and FAST/TOOLS SCADA package have several functions that reduce the number of packets that must be sent. This dramatically lowers communication fees. This document discusses the following:

Secure and cost-effective telecommunications through a GPRS wireless network
Support of various internet service provider (ISP) configurations
The failover communications capability of GPRS
Reduction of initial costs by using commercial off-the-shelf (COTS) network components
Reduction of communications costs by reducing the number of data packets

Yokogawa ensures a reliable heat and CO2 transfer system by using the standard GPRS protocol. The exclusive use of webbased technology enables the market gardeners to go online to order heat and CO2 and view information.

Secure and cost-effective telecommunications through a GPRS wireless network
Fully compatible with existing components
Agile action to the frequent utility revamps
Full web-based capability for conducting maintenance and viewing information via the Internet
Long-term service assured through a 10 year service contract

Automatic Custody Transfer System for Cryogenic Gas by Truck Delivery

The accurate flow measurement of liquefied gas by employing an all-digital FOUNDATION™ fieldbus based communication approach along with cryogenic gas dispensing controls.

Robust system resistant to the constant vibration in trucks
Auto dispense system while monitoring the appropriate liquefied gas temperature
Highly accurate cryogenic gas metering using a cryogenic version vortex flowmeter + FOUNDATION fieldbus: all digital technology
Auto compensation of gases to the base temperature using a density table loaded onto controllers
Auto e-mailing of daily reports for all dispenses to office via GSM/GPRS
Web-based HMI at remote site for trend view, upload, and setup of daily report

Automatic Custody Transfer System for Unmanned LNG Station

An automatic custody transfer system for unmanned LNG gas stations that embeds PC oriented functions such as e-mail, FTP, and the Java runtime environment in a robust hybrid controller.

This document presents a range of issues such as the difficulty of safe and reliable dispensing of LNG at remote unmanned sites and the tracking of LNG distribution and sales for inventory and billing purposes.

Safe installation at hazardous remote sites
Auto fleet identification at unmanned fuel stations
Auto compensation to base temperature using a customized equation
Automatic e-mailing of compiled daily dispense report to office via GSM/GPRS
Web-based HMI that displays dispensing and tank status at remote site and enables upload and set-up of daily report