Teledyne 2103c installation and operation guide Glossary of Terms

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2103 Modem Module Section 4 Modbus Protocol

4.4 Glossary of Terms

5.OPC connects to the 2150 stack through the cable (direct connection), takes register data from the specified 2150, and populates the OPC server's holding index.

6.Process Control takes data from the OPC server's holding index and gives data to the user.

Note that Process Control can be either manual or automated in this example, and that the OPC server and Process Control may be located physically on the same computer.

ASCII – Short for American Standard Code for Information Interchange, ASCII is a code that represents English characters with numbers. Most computers represent text with ASCII code, making it possible for one computer or device to share data with another.

2100 modules support Modbus ASCII protocol.

Dedicated Line – A telecommunications path reserved for com- munication between two specified points and not shared among multiple points.

Modbus Protocol – Modbus Protocol is a messaging structure used to establish master-slave/client server communications between intelligent devices. Modbus is a simple command/response mechanism to read from and write to reg- isters.

OPC – OPC (OLE for Process Control) means open connectivity via open (free for use) standards. It is a series of software stan- dards specifications that fill a need in automation (like printer drivers did for Windows), acting as a translator for data trans- mission and process control.

The specification defines a standard set of objects, interfaces, and methods for use in process control and manufacturing auto- mation applications to facilitate interoperability. There are hun- dreds of OPC Data Access servers and clients.

Registers – Registers are locations in memory that have specific data stored for retrieval or are used for control functions. A reg- ister is a holding place for a piece of digital information within the equipment. The definition of what is contained and where (the registry number, or address) is decided by the manufacturer (in this case Teledyne Isco).

SCADA – SCADA (Supervisory Control And Data Acquisition) is a computer system for gathering and analyzing real-time data. SCADA systems are used to monitor and control plant operation, or equipment in industries such as telecommunications, water and waste control, energy, oil and gas refining, and transpor- tation.

The SCADA system transfers the information (for example, where a leak has occurred in a pipeline), back to a central site, alerting the home station of the leak, performing necessary analysis and control (such as determining if the leak is critical), and displaying the information in a logical and organized manner.

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Contents 2103/2103c Modem Module Page Foreword Page Table of Contents Modem ModuleAppendix C Material Safety Data Sheets Appendix a Replacement PartsAppendix B Accessories List of FiguresIntroduction Introduction Product DescriptionIdentifying Module Components 2103 Modem Module Components Top View2103 Modem Module Components Bottom View 2103 Modem Module Technical Specifications 2103 Communication Connector Pins Only Safety Symbols and Hazard Alerts 2103 Modem Cable ConnectorTechnical Service Modem Module Introduction Installation and Operation SafetyUnpacking Instructions Installation Modem Module Installation and OperationTelephone Line Connection 2103 only 2103 Modem is in compliance with FCC part 68 rules. HoweverService is subject to state tariffs Modem Cable Connecting to Flowlink Flowlink Connect ScreenPushed Data Capability Modem Module Installation and Operation 2103c Cellular Modem Module OverviewAntenna Options Programming Modem Module 2103c Cellular Modem ModuleSetting dialout phone numbers and alarm conditions TAP Service Parameters Modbus Protocol OperationEstablishing Configurations Configuration Example Direct Connection ShownGlossary of Terms Common Acronyms Modbus Ascii Address 1 Register Definitions Modbus Ascii Address 2-N+1 Register Definitions 117 Volume 1 status code Bit integer Read Measurement Parameters by Model Number Modem Module Modbus Protocol Maintenance Maintenance OverviewMaintenance Kit Desiccant DesiccantHydrophobic Filter Rings Modem Module Maintenance Appendix a Replacement Parts Replacement Parts1 2103 Replacement Parts Modem Module Appendix a Replacement Parts Modem Module Appendix a Replacement Parts 2 2103c Replacement Parts Modem Module Appendix a Replacement Parts Modem Module Appendix a Replacement Parts Modem Module Appendix a Replacement Parts Modem Module Appendix a Replacement Parts Modem Module Appendix a Replacement Parts Modem Module Appendix a Replacement Parts Modem Module Appendix a Replacement Parts Appendix B Accessories How to Order General AccessoriesModem Module Appendix B Accessories Appendix C Material Safety Data Sheets Material Safety Data Sheet Health Hazard Data Material Safety Data Sheet First Aid Measures Exposure Controls/Personal Protection Toxicological Information Other Information Declaration of Conformity Page Control and Laboratory use Page Teledyne Isco One Year Limited Factory Service Warranty
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