L-INX User Manual 286 LOYTEC
Version 4.0 LOYTEC electronics GmbH
13.3.1.3 Object Database
The following properties provide information about the BACnet objects contained in the
device.
Object_List (Read-Only). This property holds a BACnetARRAY of object IDs (object type,
object instance pairs), one object ID for each object within the device that is accessible
through BACnet services.
Database_Revision (Read-Only). This property, of type Unsigned, is a logical revision
number for the device's object database. It is incremented when an object is created, an
object is deleted, an object's name is changed, an object's Object_Identifier property is
changed, or a restore is performed.
13.3.1.4 Protocol Parameters
BACnet protocol parameters are accessible via the properties listed below.
Max_APDU_Length_Accepted (Read-Only). The maximal size of an APDU
(Application Protocol Data Unit) accepted by the device. The value of this property is 487
if BACnet MS/TP is used and 1476 if BACnet/IP is used. When the device can act as a
router between BACnet/IP and BACnet MS/TP, the value of this property is 1476.
Segmentation_Supported (Read-Only). The value of this property indicates whether and
which kind of segmentation is supported by a device. The value of this property is
SEGMENTED_BOTH.
Max_Segments_Accepted (Read-Only). The maximum numbers of segments accepted by
a device. The value of this property is 16.
APDU_Segment_Timeout (Read-Writable). Timeout in milliseconds allowed between
segments. The value of this property is 2000 milliseconds by default.
APDU_Timeout (Read-Writable). Time in milliseconds the device waits for an answer
before retrying or giving up on a request; also see Number_Of_APDU_Retries. The value of
this property is 3000 milliseconds.
Number_Of_APDU_Retries (Read-Writable). The number of times the device will try to
re-send a packet before giving up on a request; also see APDU_Timeout. The value of this
property is 3 by default.
Max_Master (Read-Writable). This property is only present if BACnet MS/TP is enabled.
It defines maximal MS/TP MAC number at which the device expects an MS/TP master.
The value of this property is configurable via the configuration UI (see Section 4.2.11) and
must be in the range 1-127.. The default value of this property is 127.
Max_Info_Frames (Read-Writable). This property is only present if BACnet MS/TP is
enabled. It defines the maximal number of MS/TP packets the device can send when it
holds the MS/TP token. Increasing this value will increase latency on the MS/TP network.
The value of this property is configurable via the configuration UI (see Section 4.2.11).
The default value of this property is 1.
13.3.1.5 Diagnostics
Several properties provide run-time information about the device.
System_Status (Read-Only). The value of this property is always OPERATIONAL.
Device_Address_Binding (Read-Only). This property contains a list of bindings between
BACnet device instance numbers (the instance number part of the Device object ID) and
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