LSIS LSLV0055H100-4COFN - Protocol Implementation

RS-485 Communication Features
392
Code
Description
Password
parameter can be set within 0–32767, and the default value is 0. If the
parameter setting range is set to 1–32768, the Password value set at
BACnet Master and the value set at COM-23 must be the same to operate
Warm/Cold Start.
If COM-23 Password is set to ‗0‘, the password of BACnet Master is
ignored and Warm/Cold Start is operated.
Note
MaxMaster and MACID affect performing Network communication. It is recommended to set as
small value as possible, and to set the continuous value for MACID. If the values are set as
explained above, efficient Token Passing Configuration is possible because each Master tries to
give Token to Device set as its own (MACD+1).
7.4.4 Protocol Implementation
The following table sums the information required to implement a BACnet system. Refer to
each section of the table to implement a BACnet system properly.
Category
Items
Remarks
BACnet Services
I-Am (Answer to Who-Is, when
broadcast or reset after power-up)
I-Have (Answer to Who-Has)
Read Property
Write Property
Device Communication Control
Ignores Password in Device
Communication Control
Reinitialize Device
Warm/Cold Starts (Supports
Password)
Start Backup, End Backup, Start
Restore, End Restore, or Abort
Restore services are NOT
available.
Data Link Layer
BACnet communication card
supports an MS/TP Master Data Link
Layer
Supported Standards: MS/TP
Available speed: 9600, 19200,
38400, and 76800 bps
MAC ID/Device
Object Instance
Set at COM-01 Int485 ST ID (MAC
ID).