1 FUNCTIONS
1.1 BACnet Object Function
119
1
Format of buffer memory
Data is assigned to Un\G16 to 31 in the buffer memory fixedly.
For details, refer to the following section.
Page 261 Device object (Un\G16 to Un\G31)
Operation of a BACnet module
• A BACnet module joins/leaves BACnet by the turning ON of "Joining of BACnet" (Y1) using a program or the pause/restart
operation using a web browser.
After that, the value of the SystemStatus in the internal memory of a Device object is changed and the value is applied to
the SystemStatus in the buffer memory.
• After a TimeSynchronization service or an UTCTimeSynchronization service is received, day-of-week, time, date, and year
are set in the buffer memory and "Time setting request flag" is changed to '1' (setting request) for only one or two seconds.
After the CPU module recognized that "Time setting request flag" is '1' (setting request), the day-of-week, time, date, and
year are read and '2' (set) is written to "Time setting request flag". If a new TimeSynchronization service or
UTCTimeSynchronization service is received while "Time setting request flag" is '1' (setting request), the data will be
discarded. (Page 163 To change the time in a CPU module)
167 MaxSegmentsAccepted Unsigned R/W
168 ProfileName CharacterString R/W
193 Align_Intervals BOOLEAN R/W Only ANSI/ASHRAE 2010 is supported.
195 Interval_Offset Unsigned R/W Only ANSI/ASHRAE 2010 is supported.
196 Last_Restart_Reason Enumerated R/W
202 Restart_Notification_Recipients ListofBACnetRecipient R/W
203 Time_of_Device_Restart BACnetTimeStamp R/W
204 Time_Synchronization_Interval Unsigned R/W Only ANSI/ASHRAE 2010 is supported.
206 UTC_Time_Synchronization_Recip
ients
ListofBACnetRecipient R/W
338 Backup_And_Restore_State Enumerated R Only ANSI/ASHRAE 2010 is supported.
339 Backup_Preparation_Time Unsigned16 R Only ANSI/ASHRAE 2010 is supported.
340 Restore_Completion_Time Unsigned16 R Only ANSI/ASHRAE 2010 is supported.
341 Restore_Preparation_Time Unsigned16 R Only ANSI/ASHRAE 2010 is supported.
PropertyID Property Data type R/W Remarks
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