APPX
Appendix 2 Buffer Memory
261
A
Device object (Un\G16 to Un\G31)
The data of the Device object in a BACnet module is stored.
Un\G17 to Un\G24 are used for receiving TimeSynchronization services or UTCTimeSynchronization services from another
BACnet device. (Page 163 To change the time in a CPU module)
Additionally, the data to be stored to each address is shows in the following table.
Additionally, the availability of reading from/writing to a CPU module is shown in the following table.
R: Read-only, W: Write-only, R/W: Read/Write
IP address (Un\G32 to Un\G35)
The IP address set in [Settings] [Network Information] "IPv4" "IP Address" in a configuration function is displayed.
The following table shows the availability of reading from/writing to a CPU module.
R: Read-only, W: Write-only, R/W: Read/Write
Name Address Description R/W Initial
value
Remar
ks
Device object Un\G16 The value of a SystemStatus property is stored.
0: Operational
1: OperationalReadOnly
2: DownloadRequired
3: DownloadInProgress
4: NonOperational
5: BackupInProgress
R0
Un\G17 Four-digit year data is stored. R 0
Un\G18 Month data (01 to 12) is stored. R 0
Un\G19 Date data (01 to 31) is stored. R 0
Un\G20 Time data (00 to 23) is stored. R 0
Un\G21 Minute data (00 to 59) is stored. R 0
Un\G22 Second data (00 to 59) is stored. R 0
Un\G23 Day-of-week data is stored.
1: Monday, 2: Tuesday, 3. Wednesday, 4: Thursday, 5: Friday, 6:
Saturday, 7: Sunday
R0
Un\G24 Time setting request flag
0: Idling, 1: Setting request, 2: Configured
R/W 0
Un\G25 Reserved area 0 Fixed to
0
Un\G26 The upper 16 bits of an instance number (32 bits) in a BACnet module
is stored.
R254
Un\G27 The lower 16 bits of an instance number (32 bits) in a BACnet module
is stored.
R0
Un\G28 to Un\G31 Reserved area 0 Fixed to
0
Name Address Description R/W Initial
value
IP address Un\G32 An IP address (first octet) is stored in decimal number in word (16 bits). R 192
Un\G33 An IP address (second octet) is stored in decimal number in word (16 bits). 168
Un\G34 An IP address (third octet) is stored in decimal number in word (16 bits). 0
Un\G35 An IP address (fourth octet) is stored in decimal number in word (16 bits). 254
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