Carrier TruVu ET Display7 - Page 26

TruVu™ ET display screens
TruVu™ ET Display (part# EQT3) ©2022 Carrier.
Installation and Start-up Guide All rights reserved.
23
Screen name
Description
Time Master
If the system does not have a front-end, you should designate a controller to be the BACnet Time
Master. If a controller is the BACnet Time Master, this screen lets you configure how it sends time
synchronization broadcasts.
Time Sync Mode
- Tap in the number below that represents your selection:
•
0 = No Broadcast
- The controller will not act as Time Master.
•
1 = Local Broadcast
- If it doesn't already exist, a BACnet address with network number and
MAC address length both set to zero is added to the controller's
Time Synchronization
Recipients
list found on the driver's
Device
page in the i-Vu® interface. The controller will then
send time broadcasts only to controllers on its ARCnet or MS/TP network.
•
2 = Global Broadcast
- If it doesn't already exist, a global address with network number set to
65535 and MAC address length set to zero is added to the controller's
Time Synchronization
Recipients
list found on the driver's
Device
page in the i-Vu® interface. The controller will then
send time broadcasts to all its connected networks.
Time Sync Interval
- Enter how often local or global time broadcast should be sent (1-9999
minutes). If
Time Sync Interval
is set to zero, no time sync messages are sent.
NOTE
If the controller looks through its Time Synchronization Recipient List and finds an entry with
MAC address length set to zero and network number set to 65535, the controller's BACnet Time
Master mode is set for Global Broadcast. If there is no global broadcast entry in the recipient list,
the controller then looks for a local broadcast address (MAC address length set to zero and
network number set to zero or to the same network number as the module's). If such an entry is
found, the BACnet Time Master mode is set for Local Broadcast. Otherwise, the mode defaults to
Disabled/None.