17
TERMS
Unless otherwise specified, this manual uses the following terms.
TERMS Description
BACnet A communication standard for building automation and control network established by ASHRAE (American Society of
Heating, Refrigerating and Air-Conditioning Engineers) in 1995.
This indicates a system configured with BACnet.
BACnet controller A controller that provides input/output information of a BACnet system as a lower-level system.
BACnet device A device connected to a BACnet system.
BACnet module An abbreviation for MELSEC iQ-R series BACnet module.
BACnet workstation A central monitoring device that controls and monitors the state of a BACnet system as an upper-level system.
COV An abbreviation for 'Change Of Value'.
A BACnet service that notifies the change of a PresentValue or a StatusFlags to a BACnet device at the timing of the
change.
Data block An area that is assigned to buffer memory to read/write property values or receive data of a BACnet device using a
BACnet module.
DeviceInstanceNo An instance number for a BACnet device.
An instance number is assigned to each BACnet device to identify each BACnet device.
Engineering tool A tool for setting, programming, debugging, and maintaining programmable controllers.
For the supported tools, refer to the following manual.
MELSEC iQ-R Module Configuration Manual
Event A communication specification defined in the BACnet standard.
EventState A property that indicates an event status. This property links with a Reliability property and manages event status.
Index number A number to identify the property elements of an array.
Instance number A number is assigned for each BACnet device and object type. With this number, BACnet services can be shared in a
BACnet system.
Join To notify the existence of a BACnet controller itself to a BACnet workstation and other BACnet controllers, and to join a
BACnet system.
A method to join a BACnet and its procedure varies depending on the BACnet standard.
Leave To leave the BACnet system.
Object Information related to input/output or internal status in a BACnet device.
This indicates a BACnet object.
Object type number An identifier to distinguish each ObjectType.
ObjectIdentifier An identifier of each object that consists of an object type and its instance number.
ObjectType A type of a BACnet object.
OutOfService A property that indicates a BACnet device is not available. When this property is True, an input/output device is
physically disconnected.
PresentValue A property that indicates current value. This property is a main property that handles input/output values which are
related to each object.
Priority A property that indicates priority.
Property Detail information and attribute of each object.
An object is configured with various properties. The status of a property may affects other properties, and consequently
a control status is changed.
PropertyIdentifier An identifier that distinguishes the type of a property.
Reliability A property that indicates reliability. This property observes input/output devices if their status is normal or error.
RJ71BAC96 An abbreviation for RJ71BAC96 BACnet module.
Service A function to share information between a BACnet device and external BACnet devices.
This indicates a BACnet service.
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