Vaisala GMW90 - Manual (Page 89)

Appendix A _________________________________________________________ BACnet Reference
VAISALA ________________________________________________________________________ 87
Property Data type (Application
Type)
Writable
(Conforma
nce Code)
Value or Initial Value Persistence
Max_APDU_Length_Ac
cepted
Unsigned16 N (R) 244 Fixed
Max_Master Unsigned16 (1..127) Y (R/O) 127 Nonvolatile
Max_Info_Frames Unsigned N (R/O) 1 Fixed
Segmentation_Supporte
d
BACnetSegmentation
(ENUMERATED)
N (R) 3 (No segmentation) Fixed
APDU_Timeout Unsigned N (R) 3000 (ms) Fixed
APDU_Retries Unsigned N (R) 0 Fixed
Device_Address_Bindin
g
List of
BACnetAddressBinding
N (R) NULL Fixed
Database_Revision Unsigned N (R) 0 Volatile
Object_Identifier: Must be unique in BACnet network. As Object
Identifier is 22 bits long its value range is 0 ... 4194303. Each device is
assigned a random value in this range at Vaisala factory.
Object_Name: Must be unique in BACnet network. Default object name
contains the name and serial number of the device. For example,
transmitter model GMW95 with serial number G1234567 receives the
default object name "GMW95_G1234567".
System_Status: System status can be OPERATIONAL (0) or
NON-OPERATIONAL (4). Device goes to NON-OPERATIONAL state
in case of fatal error.
Protocol_Services: Who-Is, I-Am, Who-Has, I-Have and
UnconfirmedCOVNotification services are available only when XMW90
is MS/TP master. Reinitialize Device service must be password
protected. According to BACnet protocol, password is character string
having max 20 characters. Default password is "1234". Password can be
changed through the service port by using the BACNET command. See
section Set BACnet Parameters on page 61.
Database_revision: This is changed during operation according to
section 12.11.35 of ANSI/ASHRAE standard 135-2008.