Allen-Bradley 1756-CNB - Controlnet Network

Publication 1756-UM523F-EN-P - December 2006
ControlLogix Redundancy System Overview 19
ControlNet Network
24
4
2
3
5
6
7
0
1
4
2
3
5
6
7
0
1
Workstations and HMIs continue to connect
to the same node number.
Secondary
Chassis
CNB modules in the primary chassis
use the node number to which they
are set.
4
2
3
5
6
7
0
1
4
2
3
5
6
7
0
1
CNB modules in the secondary chassis use the
node number to which they are set plus
1.
Primary
Chassis
25
Set each pair of CNB modules to
the same node number.
25
Primary
Chassis
CNB modules swap node numbers.
CNB modules swap node numbers.
Secondary
Chassis
24
Switchover
Workstations and HMIs continue to connect
to the same node number.