Lighting Input object (LgtIn)

The Lighting Input (LgtIn) object type defines a BACnet Object that represents standardized characteristics of a lighting input command sensed by a hardwired or networked Field Device. Dimming input commands requires complex lighting input command values which may not be modeled by a simple Analog Input, Binary Input, or Multistate Input Object. LgtIn object properties are:

✳ Indicates a Siemens proprietary property.

Present value

 

 

'Present value' indicates the present value of the virtual variable.

Property ID: 85

Reliability

 

 

'Reliability' indicates whether the property value 'Present value' is reliable. If the 'Present value' is not reliable, the property 'Reliability' indicates the cause of the fault and the bit "Fault" of the state indication is set to 'True'. In a normal case, the property 'Reliability' is set to "No fault".

Property ID: 103

Out of service

 

 

"Out of service" allows decoupling the object from being modified by a control program, system program or peripheral device.

  • If "Out of service" is TRUE, the properties "Present value" and "Reliability" will no longer be updated by the respective control program, system program or peripheral device.
  • If "Out of service" is TRUE, the properties "Present value" and "Reliability" can be modified for simulating and testing purposes.
  • If "Out of service" will be changed from FALSE to TRUE, the properties "Present value" and "Reliability" keep their values. Nevertheless, they can be individually modified afterwards.
  • If "Out of service" will be changed from TRUE to FALSE, the properties "Present value" and "Reliability" keep their values. They will be modified by the next update of the producer.

Property ID: 81

Field device type

 

 

"Field device type" is a text description of the physical peripheral device connected to the input or output. Typically contains the product part number of the connected device. To be completed by the engineer. Is not used by the data acquisition.

Example: QAX3.P84 (room unit) - Entrance

Lighting state

 

 

"Lighting state" allows a respective dimming sensor to indicate the on/off-state of a lighting actuator. "Lighting state":

  • Is a writeable property that is typically written by a control program.
  • Represents the on/off state of the lighting actuator and is provided by the control program.
  • May be output to the switching or dimming sensor by the data acquisition.
  • May be used on the switching or dimming sensor to visualize the state of the lighting actuator, or to support the toggle functionality of on/off switching.
  • Will not be output to the respective data acquisition if "Out of service" is set.

Lighting value

 

 

"Lighting value" allows a respective dimming sensor to indicate the actual lighting value (0…100%) of a lighting actuator.

"Lighting value":

  • Is typically written by a control program.
  • Represents the actual value of the lighting actuator and is provided by the control program.
  • May be output to the switching or dimming sensor by the data acquisition.
  • May be used on the switching or dimming sensor to visualize the actual value of the lighting actuator.
  • Will not be output to the respective data acquisition if "Out of service" is set.

I/O address

 

 

"I/O address" identifies and documents the data source, and facilitates configuring, modifying, and querying the assignment in a standardized way.

The content of "I/O address" is technology-specific and includes:

  • Unique selector to identify and document the respective data acquisition. For example, TX-I/O or KNX PL-Link.
  • Unique address to identify the peripheral data source. For example, TX-I/O 3.4.
  • Blank until assigned to a Module.

Commissioning state

 

 

"Commissioning state" is an enumerated value representing the commissioning state (Not checked, Check failed, Check successful) of the BACnet object.

Typically set during commissioning by means of engineering and commissioning function (for example, Automation Building Tool or installer tool). It can be inspected by engineering and commissioning, or operation and monitoring functions, and used in commissioning reports.

Commissioning information

 

 

"Commissioning information" indicates additional, human-readable information about the BACnet object's commissioning state. For example, "cable defect".

Typically set during commissioning by means of engineering and commissioning function (for example, Automation Building Tool or installer tool). It can be inspected by engineering and commissioning, or operation and monitoring functions, and used in commissioning reports.

Object access level

 

 

"Object access level" defines the instance-specific object access level. "Object access level" is used for generic filtering and processing an object by a client application.

  • "Object access level" is a configuration property which can only be set up offline (ABT, application configuration).
  • "Object access level" is evaluated by client applications such as Technical Operator, DB-Import, and APOGEE Point Team mapping.

Access level

Name

Description

7

Basic operation

Access to BACnet objects and properties for a room user e.g. data points visible on a room unit.

6

Standard operation

Access to BACnet objects and properties for standard operation and monitoring (daily business), .e.g. room and plant information on a management station.

5

Extended operation

Access to BACnet objects and properties for extended operation and monitoring such as network and device objects. All I/Os are visible

4

Administrator

Not used by HQ solutions yet.

3

Basic service

Access to BACnet objects and properties used for commissioning, e.g. configuration value extensions, I/O extensions, etc.

2

Extended service

Not used by HQ solutions yet.

1

Internal

Access to all BACnet objects and properties for very specialized actions e.g. during development.

Object usage

 

 

"Object usage" indicates whether the object is used or unused. The "Object usage" property can hide or display respective objects and their functionality in a client. For example, room functionality can be marked for flexible room arrangements as used/unused. An object that is marked as unused behaves as if the object does not exist.

Property ID: 4930

Description

 

 

"Description" is a string of printable characters whose content is not restricted.

Object name

 

 

"Object name" represents a name for the object that is unique internetwork-wide. The minimum length of the string is one character. The set of characters used in the "Object name" are restricted to printable characters.

Comment

 

 

A string of printable characters whose content is not restricted.