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Comment: Added HSMS.

Glossary navigation bar

Glossary term

This refers to a way for two systems to signal each other without direct communication. For example, a PLC might set a bit in one of its tags to True, then a Transaction Group will see that tag value as a trigger to run. When finished, the Transaction Group will set the value back to False to inform the PLC.

Glossary term

Hardware Against Software Piracy Hardware Against Software Piracy (HASP) is a technology that allows us to provide a physical (USB) CD Key key (used with the HASP module) instead of the traditional 6 digit Ignition CD Keykey. This allows users to quickly move a license from one computer to another.

Glossary term
termSynshigh-performance historian

A system that stores historical data, usually in a database. Ignition's high-performance historian uses a few tricks to store data in a relational database (SQL Server, MySQL, etc.) and to only store the data you need in such a way that it is very fast to retrieve.

Glossary term
gloTermhot swap
termSynshot-swap, hot-swapable

This term is used to indicate that changes made the modules in Ignition can be done without stopping Ignition.

Glossary term

Human Machine Interface Human Machine Interface (HMI) is the user interface that allows people to interact with the machines and PLCs in their facility. Ignition's Vision module allows you to use it as an HMI by launching a client. Systems that monitor and control entire plants and provide historical and statistical data are often referred to as HMIs. The Vision module allows Ignition to act as HMIsan HMI by creating windows and launching clients to interact with your process.

Glossary term
 HyperText Markup Language (HTML) is the authoring language used to create documents on the World Wide Web

HyperText Markup Language (HTML) is the standard markup language for creating web pages and web applications. HTML defines the structure, layout, and


style of a


web document by using

a variety of 



and attributes.

The correct structure for an HTML document starts with 

HTML tags are surrounded by angle brackets, for example: <tagname>content goes here...</tagname>.

An HTML document structure starts with <HTML><HEAD>(enter here what document is about)<BODY>


and ends


with </BODY></HTML>. All the information you'd like to include in your Web page fits in between


the <BODY>


and </BODY>

 tags. - webopedia


Hypertext refers to the fact that the document contains links that allow the reader to jump to other places in the document or to another document altogether.

HTML is commonly used in the Vision module to change the font or add line breaks in buttons and label components.

Glossary term

HyperText Transfer Protocol HyperText Transfer Protocol (HTTP) is the protocol for moving information across the Internet. All webpage addresses begin with "http://" or "https://" (for a secure connection) but most new browsers hide this from you. We say Ignition uses HTTP to communicate between the Clients and the Gateway. This just means that Ignition is using an existing, proven technology to transfer its information throughout the network.

Glossary term
gloTermHardware Against Software Piracy.


Glossary term
gloTermHuman Machine Interface.

See HMI.

Glossary term
gloTermHyperText Markup Language.


Glossary term
gloTermHyperText Transfer Protocol.


Glossary navigation bar

Glossary term

The High-Speed SECS Message Services (HSMS) protocol is transport protocol for communication between computers in semiconductor factories. HSMS defines a TCP/IP based Ethernet connection and is intended as a high-speed alternative to the simple SECS-I protocol. See also SECS/GEM.

Glossary term
gloTermHigh-Speed SECS Message Services

See (HSMS).