APPX
Appendix 2 Buffer Memory
259
A
Appendix 2 Buffer Memory
This chapter explains the buffer memory of a BACnet module.
Buffer memory list
The following shows the list of the buffer memory of a BACnet module.
Do not write data to "System area" in buffer memory. Doing so may cause the malfunction of the programmable controller
system.
Address:
Decimal
(hexadecimal)
Name Description Initial value Remarks
0 to 2
(0h to 2h)
Version information of a
module
The version of a BACnet module is stored. (Page 260
Version information of a module (Un\G0 to Un\G2))
The version of the BACnet
module used.
3 to 15
(3h to Fh)
System area Use prohibited
16 to 31
(10h to 1Fh)
Device object The information of a Device object in a BACnet module is
stored. (Page 261 Device object (Un\G16 to Un\G31))
32 to 35
(20h to 23h)
IP address The IP address of a BACnet module is stored. (Page
261 IP address (Un\G32 to Un\G35))
192.168.0.254 IPv4 only
36 to 255
(24h to FFh)
System area Use prohibited
256 to 65535
(100h to FFFFh)
Data assignment area An area for reading/writing data between a CPU module and
BACnet module is assigned. (Page 262 Data
assignment area (Un\G256 to Un\G65535))
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