Glossary of Terms

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

10Base-T

The Ethernet standard by which BACnet device routers and the WebCTRL Server are networked together. 10Base-T indicates that information is transmitted between these devices at 10 million bits per second (Mbps) over twisted-pair cabling.

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A

AAR

An ARCNET-to-ARCNET router for networking the ZN line of control modules.

absolute path

A route, consisting of reference names, from the system level to a specific tree item. For example, /trees/geographic/atlanta_-_rd_facility/first_floor/zone_1/lstat.

Action pane

The right portion of the WebCTRL interface you use to view information and perform actions.

alarm

A message sent from an alarm source (usually a microblock in a control program) to WebCTRL to notify you that certain conditions exist, such as a piece of equipment has stopped running or a temperature is too high. When WebCTRL receives an alarm, it displays information about the alarm on the Alarms page. WebCTRL can also perform alarm actions to inform personnel of the condition and to record information about the alarm. An alarm source can also send a return-to-normal message when the alarm condition returns to its normal state.

alarm action

An action that WebCTRL performs to notify personnel of an alarm or to record information about the alarm. You can assign alarm actions to an alarm source, a category of alarm sources, alarm sources from a certain location, or a combination of these criteria.

alarm incident group

All alarms related to a particular incident. For example, an alarm and its return-to-normal form an alarm incident group.

alarm message

The information WebCTRL displays on the Alarms page View tab.

alarm source

A microblock in a control program that is set up to generate alarms.

Annex J, BACnet/IP

BACnet over IP, where BACnet information is routed across IP routers using BBMD tables.

APT

Access Port Transceiver. A mini-DIN connector module used to connect a computer to a control module or sensor. This device allows you to communicate with the control module network for troubleshooting or transferring memory.

ARCNET 156 kbps

Attached Resources Computer Network. A non-proprietary high-speed peer-to-peer token passing Local Area Network (LAN) protocol operating at 156 kbps. ARCNET can be used on twisted shielded cable networks, coaxial cable, and other physical media.

area

An item on the tree representing a physical location in the system such as a city, building, zone, or floor.

ATAD

A cable for connecting 9-pin computer to modem.

ATMC

A cable for connecting 9-pin computer to modem.

audit log

A record of operator and system activity stored in a text file or database.

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B

BACnet

Building Automation and Control network. Data communication protocol designed for building automation to promote interoperability between different system vendors over several transport media.

BACnet device routers

(Also device half-router) A combination of a BACnet device and a BACnet router. A device router transfers messages from one network segment to another. It also contains BACnet objects and program objects, and executes BACnet services.

BACnet object

Every point or value in a BACnet system. These objects have both a name and a unique ID.

BACview SPI Extender

A supplemental control module that allows a synchronous peripheral interface (SPI) type BACview1 or BACview2 keypad display unit to be remotely mounted up to 1000 feet away from the control module using CAT-5 cable with an RJ-45 connector on each end.

BACview1

A local operator interface and display (2 x 16 LCD)

BACview2

A local operator interface and display (4 x 40 LCD).

BACview6

A local operator interface with large keypad.

BBMD

BACnet Broadcast Management Device. A device that allows BACnet/IP (Annex J) communications across IP routers. Only one ALC BACnet router per subnetwork can be defined to function as a BBMD. A BBMD contains a Broadcast Distribution Table (BDT) which lists the IP addresses of all other BBMDs on other network segments. Whenever a BACnet broadcast is received by a BBMD on its local network segment, it then forwards the message to the other BBMDs on its list using IP Directed Broadcasts. After receiving a Directed Broadcast from the transmitting BBMD, the receiving BBMDs then retransmit the message on their local segment as a BACnet broadcast.

Boolean logic

A form of algebra in which all values are reduced to either TRUE or FALSE.

BT485

A terminator and bias board for EIA-485 networks (ME,SE, ZN)

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C

client

A computer that contacts a server and requests data such as files or web pages.

clipping

All or part of a system that is exported from one system database and imported into another system database.

control

An object on a WebCTRL graphic that reads or writes information to or from your system, such as a status values, the date or time, a trend graph, or a setpoint control.

control module

The physical device (hardware) that controls a piece of equipment based on sensor inputs and the control program in the module's memory.

control program

Software that resides in a control module to monitor and control a piece of equipment in a building. Control programs are created in EIKON for WebCTRL. A control program consists of discrete logical functions (called microblocks) linked together to create logical sequences of operation and control. Editable properties for the control program can be changed in WebCTRL. A control program can generate alarms when defined conditions are met.

Core32M

A core board memory upgrade.

COV increment

Change of Value increment. The minimum change in the present value that must occur to trigger a trend sample.

COV resubscription interval

The interval at which WebCTRL sends subscribe requests to the control module (in seconds).

custom report

Any report created with Report Designer, a tool that is furnished if your system has the advanced reporting package. You can create a custom report to collect specific information for a particular application, such as a summary report that calculates the power consumption for a building.

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D

DBMS

Database Management System. A collection of programs that allow you to store, modify, and extract information from a database. WebCTRL uses a DBMS to manage system data, events, and historic trend information.

deadband

The amount inside the normal range by which an alarm condition must return before a return-to-normal is generated.

EXAMPLE

Deadband

default gateway

The default router for all IP devices on a network. Typically, the router that connects an internal network to the Internet.

Demand Control

A strategy built into certain zone setpoint microblocks that allows the user to conserve energy by relaxing setpoints, rather than shutting down equipment, as the demand level rises in a building. You define the amount the setpoints are adjusted based on the demand level in EIKON for WebCTRL. The amount can be adjusted in WebCTRL.

description

An alphanumeric string that identifies an object to the user.

device

See control module.

DIAG485

Diagnostics board for ARCNET 156Kbps over EIA-485 or for regular EIA-485. Includes two terminator resistors. Shows the communication signal levels on the network segment and adds bias to reduce the effects of noise.

display name

The name WebCTRL displays for any object in the system (such as a tree location, operator, or microblock).

download

The process of transferring control program changes to the control modules. You can select the equipment to be downloaded and the type of download (memory, parameters, schedules, or BBMD).

duty cycle

A period of time during which equipment is alternately on and off.

dynamic IP address

Addresses that can be assigned temporarily from a pool of available addresses. Dynamic addresses can only be used on WebCTRL client computers, not servers or routers.

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E

effective setpoint

The value a control program is currently attempting to maintain (usually zone temperature) taking into account the programmed setpoint, Optimal Start, Demand Control, Timed Local Override, setpoint adjust, and hysteresis.

EIA-232

Electronic Industries Association serial communication standard (formerly known as RS-232), uses +/- 12 V signals over a 25-pin D-type connector or 9-pin D-type connector, usually located on the rear of your computer. Generally, communications run over a maximum distance of 50 feet.

EIA-485

Electronic Industries Association serial communication standard (formerly known as RS-485) uses +/- 5V signals over two or four wire multi-drop communication networks using transmitters and receivers. Generally, communications run over a maximum distance of 4000 feet.

EIKON for WebCTRL

A Windows-based application used to graphically program, display, and interact with sequences of operation for equipment and systems. It features microblocks (representing discrete logical functions) interconnected on the screen by graphical wires to form logical connections.

Ethernet

A high-speed local area network (LAN) developed by the Digital Equipment Corporation and Xerox Corporation. Ethernet networks transmit data at speeds up to 100 Mbaud.

event recipient instance

The BACnet instance number for the workstation where alarms are to be sent. CAUTION If you change the event recipient instance, you must download to ALL devices.

Exec

The software program that resides in a control module's Programmable Read-Only Memory (PROM). The firmware, or Exec, controls the processing of the control programs in the module.

expander module

A module that is added to an existing control module to add more input or output points. One or more expander modules connected to a base device is called a stack. Each expander has a unique address in the stack called the expander number.

expander number

A number that identifies which expander module an input or output point is physically wired to. Expander numbers are assigned by setting the DIP or rotary switches on the expander module, and are associated with the physical point using either the point microblock's dialog or the Properties page.

external IP address

IP address that allows a message to be routed across the Internet.

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F

FIBER485

A fiber optic converter that converts EIA-485 to fiber. Allows the use of fiber optic cable for portions of the CMnet by interfacing a 3-wire CMnet signal with multimode fiber optic port, and serves as a fiber-to-fiber repeater.

FIBER485T

A fiber optic converter with T off that converts EIA-485 to fiber. Allows the use of fiber optic cable for portions of the CMnet by interfacing a 3-wire CMnet signal with multimode fiber optic port.

field codes

Text strings inserted into alarm messages, alarm actions, and archived alarm information to retrieve live data.

firewall

A system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.

firmware

The software program that resides in a control module's Programmable Read-Only Memory (PROM). The firmware controls the processing of the control programs in the module.

foreign device

An LG router set up as a BBMD and designated as the device that communicates with WebCTRL Server if the server in separated from the LG router by an IP router.

function block (FB)

See also control program.

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G

G0100

A control module with 10 universal inputs.

G01010p

A pneumatic control module with 10 universal inputs and 10 pneumatic analog outputs.

G220

An electronic control module with 2 digital outputs and 2 universal inputs.

G4106

An electronic control module with 4 digital outputs, 10 universal inputs, and 6 analog outputs.

G4106e

An electronic control module with 4 digital outputs, 10 universal inputs, and 6 analog outputs.

G4106p

A pneumatic control module with 4 digital outputs, 10 universal inputs, and 6 pneumatic analog outputs.

G800

A digital control module with 8 digital outputs.

G8102

An non-expandable, electronic control module with 8 digital outputs, 10 universal inputs, and 2 analog outputs.

G8102e

An electronic control module with 8 digital outputs, 10 universal inputs, and 2 analog outputs.

gain

A multiplier that is used with an offset value to convert a raw analog sensor reading to the actual value. The gain property is used with the offset property to calibrate a point: Actual Value = (Raw sensor reading) x (Gain) + Offset

gateway

Provides a communications translation between the control module network and the WebCTRL Server or client.

GCM2

A LANgate with 2 RS232 ports.

global path

A path that begins with or entirely consists of a global reference name. For example, #zone_1 or #zone_1/lstat.

global reference name

A reference name that begins with a pound sign (#) and must be unique within the entire system.

graphic function block (GFB)

See also control program.

Graphic page

A page displayed in WebCTRL that graphically shows the current status of an area or piece of equipment. WebCTRL graphics include maps, building perspectives, thermographic floorplans, and equipment drawings.

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H

heat and cool source/requests

Terminal units (VAV boxes, fan terminal units, etc.) are the only pieces of equipment we recommend be scheduled (although the software will allow any equipment to be scheduled). Any other equipment that feeds it (chillers, AHUs, boilers, etc.) typically operates based on requests. Equipment that provides heating or cooling to a terminal unit or any other equipment is considered a heat or cool source.

hierarchy

The parent-child/tree structure of the system.

historic trends

Trend data that is written to the system database for long-term storage.

hotspot

An area or an object on a graphic in ViewBuilder that becomes a link to another page when the graphic is displayed in WebCTRL.

hysteresis

A microblock setting that indicates the amount by which the input value must rise above or fall below the trip point before the microblock's output is turned off. The hysteresis can prevent the microblock from changing its value too frequently when the input oscillates around the trip point. For example, if the trip point is 35 and the hysteresis is 2, the microblock's input must fall to 33 before the output turns off.

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I

installed reports

Reports that are built into WebCTRL.

internal IP address

IP address that allows a message to be routed to a segment on your local-area network.

InterOp

SuperVision v3.x systems.

InterOp Conversion Wizard

A Windows-based application used to upgrade a system from InterOp 3.x by exporting InterOp files to WebCTRL.

InterOp8500

A Johnson Controls DSC 8500 retrofit replacement.

IP address

An identifier for a computer or device on a TCP/IP network. Networks using the TCP/IP protocol route messages based on the IP address of the destination. The format of an IP address is a 32-bit numeric address written as four numbers separated by periods.

IP router

A device that connects any number of LANs. They communicate with each other to determine where packets go and the best route to get them there.

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J

JDBC

Java Database Connectivity. Enables any Java application to interact with any SQL-compliant DBMS. Because Java applications run on most platforms and because most relational databases support SQL, JDBC makes it possible to write a single database application that can run on different platforms and interact with different DBMSs. JDBC includes a JDBC-ODBC bridge so that it can also communicate with any ODBC-compliant application.

JSP

Java Server Page. A technology for controlling the content or appearance of Web pages through the use of servlets, small programs that are specified in the Web page and run on the Web server to modify the Web page before it is sent to the user who requested it.

JVM

Java Virtual Machine. A self-contained operating environment that behaves as if it is a separate computer. For example, Java applications run in a JVM that has no access to the host operating system. Because it is not part of the operating system, a pure Java application cannot damage other files or applications running on the same computer. WebCTRL, a Java application, can run on different kinds of operating systems as long as a Java Virtual Machine (JVM) has been installed. The JVM, in turn, can run on top of any kind of OS. Microsoft's JVM is included with the Windows 2000 operating system. If you are running Windows 2003 or Windows XP as a browsing client for WebCTRL, you must install a JVM. You can download the JVM from http://java.sun.com/getjava/download.html.

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K

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L

label

In EIKON for WebCTRL, a method of connecting microblocks to each other in a control program. Labels carry analog or digital values between microblocks when a wire cannot be drawn or is not appropriate. See also wire.

LANgate HW

A communication gateway.

LANgate SW

A program.

Learning Adaptive Optimal Start

A method used by certain Zone Setpoint microblocks to regulate setpoints so that the ideal temperature range can be achieved when building occupancy begins. The Learning Adaptive Optimal Start routine adjusts setpoints based on the heating or cooling capacity of the equipment, which is adjusted (or learned) over time as the equipment meets or fails to meet the ideal temperature range.

legacy

Previous generation ALC systems.

LG

LANgate

LGC

A 156k Gateway to CMnet.

LGE

LANgate Ethernet Gateway. A compact BACnet router that provides communication between an Ethernet or IP network and an ARCNET 156Kbps network segment. Supports up to 98 control modules.

LGEO

LANgate Ethernet Option

LGL

LANgate Lite (Up To 6 LGLs)

LGR1000

A LANgate router, 1000 third-party points.

LGR25

A LANgate router, 25 third-party points.

LGRM-E

LANgate Rack mount Ethernet BACnet router that provides communication between an Ethernet or IP network and an ARCNET 156Kbps network segment. Supports up to 98 control modules. Has standard 19-inch rack mount enclosure.

LGTRO

LG Token Ring Option

location-dependent security policy

A type of system security that allows you to assign privileges to an operator only at locations in the system where he needs them. With this type of security, you can also assign him privileges that apply through the entire system.

location-independent security policy

A type of system security that only lets you to assign privileges to an operator for the entire system.

Logic page

A page that displays the control program for a piece of equipment.

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M

M0100

An expandable base control module with 10 universal inputs.

M01010pnx

A pneumatic, non-expandable control module with 10 universal inputs and 10 analog outputs.

M0320

An expandable base control module with 32 universal inputs.

M16160

An expandable base control module with 16 digital outputs and 16 universal inputs.

M220nx

A non-expandable control module with 2 digital outputs and 2 universal inputs.

M4106

An expandable base control module with 4 digital outputs, 10 universal inputs, and 6 analog outputs.

M4106nx

A non-expandable control module with 4 digital outputs, 10 universal inputs, and 6 analog outputs.

M4106p

A pneumatic control module with 4 digital outputs, 10 universal inputs, and 6 analog outputs.

M8102

An expandable base control module with 8 digital outputs, 10 universal inputs, and 2 analog outputs.

M8102nx

A non-expandable control module with 8 digital outputs, 10 universal inputs, and 2 analog outputs.

M880nx

A non-expandable control module with 8 digital outputs and 8 universal inputs.

manual command

A command that you execute in WebCTRL using the Command menu option. A manual command can navigate to another place in WebCTRL or it can execute an action.

MCPU

An expandable base control module.

ME-LGR1000

A gateway module, PowerPC, expandable, 200 third-party points.

ME-LGR25

A gateway module, PowerPC, expandable, 25 third-party points.

microblock

A block of programming code that has a specific purpose and is represented by a graphic symbol. Microblocks are combined in EIKON for WebCTRL with wires and labels to create a control programs.

microblock pop-up

An interactive window used for viewing and modifying a microblock's properties.

microblock properties

User-defined values or settings that together define the characteristics of a microblock. See Microblock Reference Help.

mismatch

The condition that occurs when the values in a control module do not agree with those in the system database.

MS/TP

Master Slave/Token Passing scheme operated over an EIA-485 communications network. Master controllers must be aware of other controllers (both master and slave) on the network and pass a token that allows the recipient to initiate a BACnet message. Slave controllers only respond to master controllers.

MX0160

A control module point expander with 16 universal inputs.

MX0320

A control module point expander with 32 universal inputs.

MX040

A control module point expander with 4 universal inputs.

MX080

A control module point expander with 8 universal inputs.

MX1600

A control module point expander with 16 digital outputs.

MX16160

A control module point expander with 16 digital outputs and 16 universal inputs.

MX400

A control module point expander with 4 digital outputs.

MX4106

A control module point expander with 4 digital outputs, 10 universal inputs, and 6 analog outputs.

MX4106p

A pneumatic control module point expander with 4 digital outputs, 10 universal inputs, and 6 pneumatic analog outputs.

MX440

A control module point expander with 4 digital outputs and 4 universal inputs.

MX800

A control module point expander with 8 digital outputs.

MX8102

A control module point expander with 8 digital outputs, 10 universal inputs, and 2 analog outputs.

MX880

A control module point expander with 8 digital outputs and 8 universal inputs.

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N

NAT

Network Address Translation. An Internet standard that enables a local-area network to use one set of IP addresses for internal traffic and a second set of addresses for external traffic. NAT provides a type of firewall by hiding internal IP addresses. NAT enables a company to use more internal IP addresses without conflicting with IP addresses used by other companies and organizations. NAT allows a company to combine multiple ISDN connections into a single Internet connection.

native BACnet

A system where all devices residing on any physical network segment communicate using the BACnet protocol. A non-native BACnet system may offer some access to another BACnet system through a BACnet gateway, but use a proprietary protocol between some system devices.

Navigation pane

The left portion of the WebCTRL interface used to navigate the system. The navigation pane consists of the navigation tree, the view buttons, and the button that shows alarms and schedules in the navigation tree.

navigation tree

The hierarchy of the system where you select the system object you want to view or act upon.

NI485

A direct network cable that connects Direct Network to a control module's Direct Network port and an EIA-232 computer port.

NI485N

A direct network cable that connects Direct Network to a control module's Direct Network port and Exec 4.x module's port.

nib

A small pin on the side of a microblock. Wires and labels must connect with a microblock's nib in order for the control program to compile.

NITNA

A cable used to download default settings from NI485 to Tnet.

node

A basic element in the tree structure of a database, such as areas and equipment on the Geographic tree or routers and control modules on the Network tree. Nodes are arranged in a parent/child structure.

NWPB

A network protection board that acts as a primary defense against large electrical surges on communication circuits.

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O

Object

See BACnet object.

ODBC

Open Database Connectivity. Enables any ODBC-compliant software application to communicate with any ODBC-compliant DBMS.

offset

An additive factor that is used with a gain to convert a raw analog sensor reading to the actual value. The offset property is used with the gain property to calibrate a point: Actual Value = (Raw sensor reading) x (Gain) + Offset.

open protocol

A set of protocol standards and rules available for public use, such as BACnet and LonWorks. Open protocols allow communication among control modules from different vendors.

operating system

A set of commands that enables software applications to communicate with the computer system hardware. Software applications allow people to create, manipulate, and receive a variety of complex information such as text, audio, charts, and images. Besides enabling software and hardware to work together, most operating systems do three basic tasks—manage memory, process scheduling such as multi-tasking and time slicing, and control communication between hardware and software. For example, Microsoft Access.

operator

A user of the WebCTRL system, identified by a name and password.

operator group

Multiple operators that require the same privilege set.

Optimal Start

An algorithm used by certain zone setpoint microblocks to achieve desired zone temperature by the time building occupancy begins. The Optimal Start routine adjusts setpoints before occupancy based on the outside air temperature, the heating or cooling capacity of the equipment, and the amount of time remaining prior to occupancy.

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P

path

A route, consisting of reference names, from one item in the system to another.

peer-to-peer

A type of communications where one control module communicates with another control module of equal status.

prime variable

A single number from a control program that best represents the control program's state. Generally, it is the value of some physical variable, such as temperature or airflow. For zone control, you might choose zone temp. For a chiller, it might be discharge water temp.

privilege

Permission to access a certain part of the system or perform a certain function. You assign privileges to a privilege set.

privilege set

A group of one or more privileges. You assign a privilege set to an operator to grant him its privileges.

programmed setpoint

The point at which mechanical cooling or heating equipment is enabled to maintain appropriate temperature in a zone.

Properties page

Pages in WebCTRL that allow you to make changes to the settings you want your system to maintain. They also reflect what the system is actually doing.

PROT485

A surge protection device for ARCNET 156Kbps over EIA-485, for U-net, or for regular EIA-485. Place at each entrance or exit to the building and within 250 feet (76 meters) of every control module. Replaces NWPB for legacy CMnet protection.

protocol

A set of rules and structure that governs how computer devices talk to one another.

PTP

Point-to-point. Serial communication between two devices locally or over a telephone modem. An example is connection of a hand held tool to a controller.

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Q

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R

R683

A rooftop/AHU control module with 6 digital outputs, 8 universal inputs, and 3 analog outputs.

reference name

A permanent name for a tree item that allows the item to be referenced from graphics, Properties pages, external spreadsheets, etc. A reference name consists of lowercase letters, numbers, hyphens, and underscores (no spaces), and it cannot begin with a number. In the system hierarchy, a reference name must be unique among its siblings, unless it is a global reference name.

RefName

See reference name.

relative path

A route, consisting of reference names, from the current tree item to another tree item. For example, first_floor/zone_1/lstat.

REP485

A repeater for ARCNET 156Kbps over EIA-485 or for regular EIA-485 networks running from 1200 bps to 156 kbps. It boosts communication signals over long runs of wire. Opto isolated.

repeater

A device that connects two or more segments of a communication network and reproduces the signal. This is necessary because electronic signals lose their strength over distance.

REPOPT

An Opto Isolator/Repeat that provides two bidirectional ports that are optically isolated from each other.

request

The method by which control programs communicate their heating and cooling needs to each other. By using requests you can construct a software "chain" mimicking the mechanical chain of equipment in the building. When properly constructed, requests allow you to schedule terminal or zone equipment only, and allow other equipment to respond to the zone requests.

return-to-normal

A message sent from an alarm source to WebCTRL when an alarm condition returns to its normal state.

RJ45 Connector

An 8 position modular jack used for Ethernet cabling.

router

Forwards data packets along networks. A router is connected to at least two networks, commonly two LANs or WANs or a LAN and its ISP's network. A router must have an IP address for each network it routes to. Routers determine the best path for forwarding the packets and configure the best route between any two hosts.

RS Pro

A room temperature sensor with an LCD display, setpoint adjustment, local override, and a local access port for attaching a laptop. Use with control modules having an Rnet.

RS Standard

A room temperature sensor with a local access port for attaching a laptop. Use with control modules having an Rnet.

RSS

A 4–20mA room sensor.

RSZ+

A thermistor-based temperature sensor for R line, T line, and Z line modules. Has timed local override switch, local setpoint adjust switch, and an occupied LED indicator.

runtime

The amount of time a piece of equipment has been running.

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S

S6104

A non-expandable control module with 6 digital outputs, 10 universal inputs, and 4 analog outputs.

schedule group

When scheduling, you can identify groups of equipment or zones that follow the same schedule. Use schedule groups to create schedules for related equipment in different areas or when you want to schedule only some of the equipment in a given area. Schedule groups can include other schedule groups. A schedule group can also include equipment or areas in different sites.

schedule priority and precedence

Priority describes the relative level of importance of a schedule to other schedules and is used in determining which schedule WebCTRL follows at any given time. Precedence describes the relative level of importance of a schedule to other schedules of the same priority.

schedules

A cost-saving WebCTRL feature that allows you to define when a building or zone is in a certain state, such as being occupied. Schedules allow the equipment to cycle on and off as necessary to maintain the programmed setpoints for that state.

SE6104

A non-expandable control module with 6 digital outputs, 10 universal inputs, and 4 analog outputs.

segment

A network of up to 32 control modules on the same physical connection. A new segment begins with a REP485. The maximum length of a segment is 2000 feet (609.6 meters).

server

A computer that serves requested information, files, and other services to clients. A web server is a type of server that serves web pages. The WebCTRL server is a web server.

setpoint

A temperature value that is set by the user and maintained by the equipment. Cooling setpoint is the temperature at which cooling is enabled. Heating setpoint is the temperature at which heating is enabled. See also effective setpoint.

simulation

An action that allows you to test an alarm action and view the resulting message.

site

A separate TCP/IP (Transmission Control Protocol/Internet Protocol) network.

SiteBuilder

A cross-platform application used to generate engineering databases through a graphical and menu-based interface.

SNMP

Simple Network Management Protocol. Alarm action that sends an SNMP trap to a network. Some examples of monitoring software are HP Openview, Novell NMS, IBM NetView, or Sun Net Manager (contact Technical Support for more options).

SSL

Secure Sockets Layer. See TLS.

static IP

A specific IP address assigned to a WebCTRL server or router. A permanent IP addresses which do not change are called static IP addresses. A static IP address is usually obtained from the network administrator. WebCTRL server and BACnet routers must have static addresses.

status flag

Indicates the current state of a point. Valid flags are: 1=alarm, 2=fault, 4=override, and 8=out of service. Valid flag values can also include any sum of any combination of these numbers. For example, a point that goes into alarm and then out of service is assigned a status flag value of 9 (1+8).

symbol (EIKON for WebCTRL)

A commonly-used graphic programming sequence that is stored in a .sym file so that it can be inserted in control programs as needed. Symbol files can be created in EIKON for WebCTRL using the Edit-Copy To menu command.

symbol (ViewBuilder)

A commonly-used combination of images, controls, and text that is saved in a file so that it can be inserted in graphics as needed. Most symbols relate to duct work, such as coils, fans, and dampers. Some symbols are animated, such as a fan turning when the fan is on.

system

A group of modules accessed from a single database. A system can contain more than one site.

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T

T320

A control module for exhaust fans, unit heaters, and domestic water heaters. Has 3 digital outputs and 2 universal inputs.

T320V

RSZ+ with 3 digital outputs and 2 universal inputs.

T540

Zone control with 5 digital outputs and 2 universal inputs.

T540V

Zone control with integral air flow sensor. Has 5 digital outputs and 2 universal inputs.

TCP

Transmission Control Protocol. A guaranteed delivery method where the sender verifies that the data packets arrive at the destination.

TERM485

A terminator resistor for ARCNET 156Kbps over EIA-485 or for regular EIA-485. Prevents signal at end of cable from echoing or reflecting back.

terminator

A 120 Ohm resistor that should be placed at the beginning and end of every segment to prevent signal distortion due to echoing.

thermographic colors

Colors on a floorplan or equipment graphic that indicate current conditions, such as too warm or too cool.

TLS

Transport Layer Security. A communication protocol that provides client/server authentication and 128-bit encryption of all transmitted data. TLS is a more recent version of SSL (Secure Sockets Layer).

TNI

A parent control module that controls up to 40 T-card zone controllers.

TNPB

A T-net protection board that acts as primary defense against large electrical surges on T-Net communication circuits.

trend graph

A graph that displays equipment status values over a period of time.

trend log

The object in a module containing the trend data (either the Trend microblock or the embedded trend object in I/O microblocks).

trip point

The value of the input that causes the output to change states.

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U

U141v+

A control module for pressure independent VAV applications. Includes integral actuator and precision air flow sensor. Has 1 digital output, 4 universal inputs, and 1 analog output.

U220

A control module for exhaust fans, unit heaters, and domestic water heaters. Has 2 digital outputs and 2 universal inputs.

U253

A control module for unit ventilators and other packaged HVAC applications. Compatible with USF/UDF optional air flow sensor for pressure independent VAV application. Has 2 digital outputs, 5 universal inputs, and 3 analog outputs.

U341v

A control module for pressure independent VAV applications. Includes integral air flow sensor only. Requires external actuator. Has 3 digital outputs, 4 universal inputs, and 1 analog output.

U341v+

A control module for pressure independent VAV applications. Includes integral air flow sensor and integral actuator. Has 3 digital outputs, 4 universal inputs, and 1 analog output.

U551

A control module for heat pumps, fan coil units, and other packaged HVAC applications. Compatible with USF/UDF optional air flow sensor for pressure independent VAV applications. Has 5 digital outputs, 5 universal inputs, and 1 analog outputs.

UASF

A zone control module extension designed for use with the U341v+ dual duct applications. Includes integral actuator and precision air flow sensor.

UDF

An air flow sensor that plugs directly into U253 or U551 controller.

UDP

User Datagram Protocol. A non-guaranteed delivery method. The data packets are delivered without verifying that the receiver gets the data packets. UDP consumes less bandwidth than TCP.

UNI

A parent control module that is interoperable with TNI.

UNI16

A parent control module for U-Line network interface that can control up to 16 zone control modules; supports legacy CMnet, but not T-cards.

UNI30

A parent control module for U line or T line network interface that can control up to 30 zone control modules, ARCNET 156 only.

UNI32

A parent control module for U line network interface, controls up to 32 zone control modules; supports legacy CMnet, but not T-cards.

UNI59

A parent control module for U line or T line network interface, controls up to 59 zone control modules; supports legacy CMnet, replaces TNI.

USF

An air flow sensor that plugs directly into U253 or U551 controller.

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V

value

An assigned, sensed, or calculated numerical quantity associated with a point, event/alarm, or node.

Variable color

A feature of ViewBuilder that you assign to an area or object so that it will display different colors in WebCTRL to denote status, such as too warm or too cool.

ViewBuilder

A cross-platform application used to create WebCTRL graphics for WebCTRLv2.5 and forward. See also graphic.

ViewBuilder for WAP

A cross-platform application used to customize WebCTRL pages viewed on WAP-enabled devices.

VPN

Virtual Private Network. A private, encrypted tunnel through the Internet that allows transmission of data between two physical sites.

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W

WACS

Web Accessible Control System. A building automation system that generates web pages.

WAP

Wireless Application Protocol. A communications protocol that allows you to access your system through a wireless device, such as a telephone.

WebCTRL

A cross-platform web-based application that provides a graphical interface to a control network for common control modules and complex energy management functions. WebCTRL uses dynamic color graphics to communicate the operational conditions of a building, and accepts adjustments to controlled equipment's editable properties. WebCTRL provides alarm handling flexibility, including several alarm notification options and reporting actions.

WebCTRL client

A web-enabled device capable of browsing to the WebCTRL server.

WebCTRL extensions for FrontPage

Custom add-ons to Microsoft FrontPage® that allow the creation of WebCTRL graphics (v1.0 through v2.0 systems only). See also graphic.

WebCTRL Server

A server application that communicates with system control modules and generates the web pages that allow you to view or edit the system on a WebCTRL client.

WebDAV

Web-based Distributed Authoring and Versioning. A set of extensions to the HTTP protocol designed for managing remote server files through an Internet connection.

WebPRTL

A control module interface that monitors the status of third-party devices.

WebZONE

A Barber-Coleman's or Invensys's MICROZONE II retrofit replacement.

wire

A special line drawn in EIKON for WebCTRL to transmit values from one microblock to another. Analog data is transferred along solid wires, and digital data is transferred along dashed wires. Wires can be connected to microblocks, labels, or other wires. When a wire cannot be drawn or should not be used, a label serves the same purpose. See also label.

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X

X01010p

A pneumatic control module point expander with 10 universal inputs and 10 pneumatic analog outputs.

X0160

A control module point expander with 16 universal inputs.

X0320

A control module point expander with 32 universal inputs.

X040

A control module point expander with 4 universal inputs.

X080

A control module point expander with 8 universal inputs.

X1600

A control module point expander with 16 digital outputs.

X16160

A control module point expander with 16 digital outputs and 16 universal inputs.

X400

A control module point expander with 4 digital outputs.

X4106e

A control module point expander with 4 digital outputs, 10 universal inputs, and 6 analog outputs.

X4106p

A pneumatic control module point expander with 4 digital outputs, 10 universal inputs, and 6 pneumatic analog outputs.

X440

A control module point expander with 4 digital outputs and universal inputs.

X484p

A pneumatic control module point expander with 4 digital outputs, 8 universal inputs, and 4 pneumatic analog outputs.

X800

A control module point expander with 8 universal inputs.

X8102e

A control module point expander with 8 digital outputs, 10 universal inputs, and 2 analog outputs.

X880

A control module point expander with 8 digital outputs and 8 universal inputs.

XCPU

A control module with 32-bit processor and 256k memory.

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Y

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Z

Z01010p

A control module for 10 pneumatic zone applications with 10 universal inputs and 10 pneumatic analog outputs.

Z320

A zone control module with 3 digital outputs and 2 universal inputs.

Z320v

A zone control module with integral air flow sensor. Has 3 digital outputs and 2 universal inputs.

Z443

A zone control module with 4 digital outputs, 4 universal inputs, and 3 analog outputs.

Z540

A zone control module with 5 digital outputs and 2 universal inputs.

Z540v

A zone control module with integral air flow sensor. Has 5 digital outputs and 2 universal inputs.

ZN220

A control module for miscellaneous applications. Has 2 digital outputs and 2 universal inputs.

ZN253

A control module for heat pumps, fan coil units, and other packaged HVAC applications. Has 2 digital outputs, 5 universal inputs, and 3 analog outputs.

ZN551

A control module for heat pumps. fan coil units, and other packaged HVAC applications. Has 5 digital outputs, 5 universal inputs, and 1 analog output.