TERMINAL SETTINGS
7
EN1B-0022 IE10 R0717
address required. By default, the switches are already set to
(0xFF) for controllers that support Automatic MAC addressing.
To enable Automatic MAC addressing again, set the switches
back to (0xFF).
For the controller to support AutoMAC, the boot loader version
must be v2.5.1 or later and the firmware version v2.7.3 or
later.
Possible Automatic MAC addressing scenarios
Manual MAC addressing
Attention
The switches are only read by the controller when
turned ON. Therefore, whenever the switch
positions are changed the power must be
removed and reapplied before the new switch
positions take effect.
Note
The times provided in the following table are only
for information. The actual time taken for
resolution of MAC address conflicts may slightly
vary.
Scenario
Time
Remarks
A: Auto MAC controller
initial start-up time and
acquire MAC address on
single BACnet MS/TP
bus after power-on (Cold
boot or reset).
30 secs
29 Manual MAC controllers.
1 Auto MAC controller that
must acquire a MAC
address.
Time includes start-up time
plus time to acquire MAC
address.
B: Average initial start-up
time and acquire MAC
address where all
controllers on a single
MS/TP bus are Auto
MAC controllers.
260 secs 30 Auto MAC controllers.
All controllers must acquire
a MAC address.
Time includes start-up time
plus time to acquire MAC
address.
C: Average time for MAC
conflicts to be resolved
when an Auto Mac
controller is added to an
MS/TP bus while Auto
MAC process is still
operating.
50 secs
15 existing Auto MAC
controllers.
13 existing Manual MAC
controllers.
Add 1 Auto MAC controller
where there is an address
conflict with existing Auto
MAC controller.
D: Average time for MAC
conflicts to be resolved
when a Manual Mac
controller is added to an
MS/TP bus while Auto
MAC process is still
operating.
50 secs
15 existing Auto MAC
controllers.
13 existing Manual MAC
controllers.
Add 1 Manual MAC
controller where there is an
address conflict with
existing Auto MAC
controller.
E: Average time for MAC
conflicts to be resolved
when a manual MAC
controller with conflicting
MAC address is added to
an MS/TP bus.
30 secs
15 Auto MAC controllers.
14 Manual MAC controllers.
Add 1 Manual MAC
controller where there is an
address conflict with an
Auto MAC controller.
F: Average time for Auto
MAC controller restart
where all controllers on
MS/TP bus are Auto Mac
and have previously
acquired a MAC address.
Verify that the MAC
address remains
unchanged after restart
when there is no conflicts.
25 secs
30 Auto MAC controllers.
All controllers have all
acquired MAC address from
previous operation.
No MAC address conflicts
exist before power down and
restart.
All controllers retain
existing MAC address after
restart.
Time includes start-up time
plus time to verify there are
no MAC address conflicts.
Attention
Address Switch 1 & Address Switch 2 are HEX
switches which are used in combination for
addressing the CPO-VAV2A controller. The valid
address for CPO-VAV2A is from 1 to 30.
Scenario
Time
Remarks
