LOYTEC L-DALI, Руководство пользователя

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L-DALI User Manual 363 LOYTEC
Version 5.2 LOYTEC electronics GmbH

Contact Close Label (String): This property contains the active text of the binary data
point.

Contact Open Label (String): This property contains the inactive text of the binary data
point.
8.5.2.3 Multi-state
Multi-state data points are exposed as a one-to-one mapping to OPC tags. For each multi-
state data point an OPC tag is created. The OPC tag contains a number of OPC properties,
which are derived from the data point’s properties:

Item Canonical Data Type (SmallInt): This property indicates the data type ‘3’
(Integer).

Item Value (Integer): The present data point value.

Item Quality (SmallInt): The value quality. It is “good” if the data point is in normal
state, or “uncertain” if the data point has an off-normal state, e.g., offline or unreliable.

Item Timestamp (Date): This property contains the timestamp of the last value update.

Item Access Rights (Integer): This property defines whether the tag is read-only or
read/write.

Item Description (String): This is the description of the data point.

Item EU Type (Integer): This property is ‘2’ for multi-state.

Enumerated EU (Array of String): This property contains the state texts of the data
point.
8.5.2.4 User Type
User-type data points contain a byte array of user-defined data. Data points of user-type are
also exposed as a one-to-one mapping to OPC tags. For each such data point, an OPC tag is
created. The item value of the user-defined data is a hex string without whitespace
representing the byte array, e.g., “B034”. The OPC tag contains a number of OPC
properties, which are derived from the data point’s properties:

Item Canonical Data Type (SmallInt): This property indicates the data type ‘8’ (String).

Item Value (String): A hex string without whitespace representing the byte array.

Item Quality (SmallInt): The value quality. It is “good” if the data point is in normal
state, or “uncertain” if the data point has an off-normal state, e.g., offline or unreliable.

Item Timestamp (Date): This property contains the timestamp of the last value update.

Item Access Rights (Integer): This property defines whether the tag is read-only or
read/write.

Item Description (String): This is the description of the data point.
8.5.2.5 String
String data points contain a string of text characters. Data points of string type are also
exposed as a one-to-one mapping to OPC tags. For each such data point, an OPC tag is