H-V
- H -
HMI server
The software module that is responsible for performing core run-time operations such as data collection, alarm detection, historical data logging and retrieval, and for providing FactoryTalk View SE Clients with graphic displays, runtime data, and events.
- I -
Incoming Certificate
Certificate provided by an OPC UA client to
FactoryTalk Linx Gateway
when the client initiates a communications request. Note that incoming certificates are not trusted until a user accepts or trusts them through the FactoryTalk Linx Gateway
’s user interface.Internal Object Identifier
Internal Object Identifier (IOI) identifies the CIP object with which the connection is to be established within the CIP device specified by the target.
IP Address
Each server or client on a TCP/IP internet is identified by a numeric IP (Internet Protocol) address. The two types of IP addresses are the IPv4 (IP version 4) address and the IPv6 (IP version 6) address.
IP addresses are managed and allocated to users by the Internet Assigned Numbers Authority (IANA) and its delegates. The internet address specifies both the network and the individual host. This specification varies with the size of the network. An IP address identifies a machine in an IP network and is used to determine the destination of a data packet. Port numbers identify a particular application or service on a system.
- L -
Localized
Software Localization is the process of adapting or translating software to a specific locale's language, culture, and legal requirements. Localization will require modifications to the user-visible components of software such as the user interface, images, and documentation.
L modifier
L modifier indicates the length (block size), or the number of items to be read. Use the L modifier in a client application to read the data block (for example, array tag) in a single action.
- M -
MQTT
MQTT is an OASIS standard messaging protocol for the Internet of Things (IoT). It is designed as an extremely lightweight publish or subscribe messaging transport that is ideal for connecting remote devices with a small code footprint and limited network bandwidth.
MQTT broker
An MQTT broker is an intermediary entity that enables MQTT clients to communicate.
MQTT publisher
An MQTT publisher sends messages to a single topic on an MQTT broker. Any MQTT client
subscribed to that topic receives the messages.
MQTT subscriber
An MQTT subscriber is a client that connects to an MQTT broker to receive messages
published to specific topics.
- N -
Namespace
A collection of information that a Server makes visible to its Clients.
Namespace index
The numeric values used to identify
OPC
UA namespaces correspond to the index in the NamespaceArray.NodeID
A numeric or text value that uniquely identifies a data value in an
OPC
UA Server. An OPC
UA client will receive NodeIDs from an OPC
UA server while browsing its namespace and will make read, write, and subscription requests for data by delivering the NodID back to the OPC
UA server.Network Interface Controller
A network interface controller (NIC) is a computer hardware component that connects a computer to a computer network, typically a circuit board or chip.
- O -
OPC DA
OPC (Open Platform Communications) Data Access (DA) is a non-proprietary technical specification that defines a set of standard interfaces based on Microsoft’s OLE/COM (Component Object Model) technology. Applying OPC DA standards makes interoperability possible among automation and control applications, field systems and devices, and business and office applications.
The
FactoryTalk Services Platform
supports and extends the OPC DA 3.0 specification, which includes the ability to browse data items.For more information on
OPC
DA, see https://opcfoundation.org.OPC Test Client
A data connections test utility that shows whether you are using Remote OPC Client functionality.
OPC UA
OPC (Open Platform Communications) Unified Architecture (UA) is a platform-independent service-oriented architecture that integrates the individual OPC Classic specifications into one extensible framework. Applying OPC UA standards makes interoperability possible among automation and control applications, field systems and devices, and business and office applications.
For more information on
OPC
UA, see https://opcfoundation.org.Outgoing Certificate
Certificate generated by
FactoryTalk Linx Gateway
and delivered to OPC UA clients when they initiate a communications request. Note that many OPC UA clients require manual approval when they receive a certificate to enable communications with an OPC UA server.- P -
poll
Systematically request data from a device.
poll rate
Often how data is requested from a device. Poll rates are typically specified in milliseconds. (A poll rate of 1000 ms results in data being requested every second).
port number
A port number is a way to identify a specific process to which an internet or other network message is to be forwarded when it arrives at a server. All network-connected devices come equipped with standardized ports that have an assigned number. These numbers are reserved for certain protocols and their associated function.
proxy
Proxy is a function that acts as an intermediary between a client requesting a resource.
- R -
rehost (an activation)
Rehosting an activation provides a way of moving an activation file from one computer or device to another. Rehosting an activation file deactivates the file on the computer that is hosting it and then creates a rehost code that Rockwell Technical Support staff can use to generate a new activation file for use on another computer.
Remote Proxy service
Remote Proxy service enables FactoryTalk Linx on other computers to share the FactoryTalk Linx service on the FactoryTalk Linx Gateway computer to interface with an automation network.
RTD
Refer to Excel RTD.
- S -
signing
Cryptographic digital signatures use public key algorithms to provide data integrity. When you sign data with a digital signature, someone else can verify the signature, and can prove that the data originated from you and was not altered after you signed it.
Scalar tag
Defines a reference so a single memory variable represented using an elemental type, for example, BOOL, BYTE, SINT, INT, UINT, DINT, UDINT, LINT, ULINT, REAL.
scope
The level at which tags and routines may be created. They can be created at the controller level (accessible to all routines), or the program level (accessible to only the routines within a single program).
SDK
A software development kit (SDK) is a collection of software development tools in one installable package. They facilitate the creation of applications by having a compiler, debugger, and sometimes a software framework. They are normally specific to a hardware platform and operating system combination.
shortcut
A symbolic reference to a physical device that you want to connect to on the network, and the data that device contains. The communication path associated with the shortcut tells the application where to find that data.
SSL
Secure Sockets Layer (SSL) is standard technology for securing an internet connection by encrypting data sent between a website and a browser (or between two servers).
Structure
A data structure is a compound data record that can contain multiple data elements each defined as a scalar, array or nested structures.
- T -
TCP
TCP (Transmission Control Protocol) is a standard that defines how to establish and maintain a network conversation through which application programs can exchange data. TCP works with the Internet Protocol (IP), which defines how computers send packets of data to each other.
tag
A named area of the process-connected device or controller’s memory where data is stored. It is the basic mechanism for allocating memory, referencing data from logic, and monitoring data.
tag group
A set of data items defined in the
FactoryTalk Linx Gateway
's UA Tag List interface that share a set of security settings enabling authorized OPC
UA clients to access the data.TLS
Transport Layer Security (TLS) is a cryptographic protocol designed to provide communications security over a computer network, such as the Internet.
topology
The way a network is physically structured. This includes all networks, nodes, devices, Data Providers, drivers/channels, and object protocols. In
FactoryTalk Linx
, this is presented in tree form (the communications tree).- U -
UA
See
OPC UA
.UA tag list
The UA tag list configuration determines the data values that each
OPC
UA Client can access from FactoryTalk Linx Gateway
. The UA tag list option provides both enhanced security and complex type information (for example, structures and arrays). When the UA tag list option is disabled, all tags that are available from data sources in a FactoryTalk Application (for example, controllers and hardware via FactoryTalk Live, OPC DA, and OPC UA servers) are accessible as scalar values to OPC UA Clients. The UA tag list contains one or more tag groups that define access rights and includes complex type information enabling an OPC UA Client to use structures or User Defined Types (UDT) from Logix controllers.Unconnected messaging
An unconnected message permits the computer to perform a single interaction with a device. While an unconnected message can be simpler to initiate, the entire route must be included in every request. Processing of the unconnected message request and response are lower priority than other forms of communications making this a less efficient form of communications.
URL
A Uniform Resource Locator (URL) is a reference to an OPC UA Server that specifies its location on a computer network and the TCP port used to interface with it.
- V -
VBA
VBA stands for Visual Basic for Applications. Excel VBA is Microsoft's programming language for Excel. For more information, refer to Getting started with VBA in Office.
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