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TC2100 DM
User's Manual
Ver. 1.6
MNL-21000-01-16
Figure 9. Ring operation under normal condition
In case one, both A-ring and B-ring are broken on both sides of main master unit (see figure 10), which
stops “unit 1” from sending any signal to rest of the units. Normally, the network will be down even with
self-healing ring feature, but with “unit 3” in “Dual Master Mode” user only needs to connect “unit 3” to Host
Controller. The “unit 3” will become a master unit and send signals to rest of the units on the network. In
the mean time “unit 2” and “unit 4” will activate self-healing feature, which wraps the data to avoid the broken
data link, and the network will function normally again.
Figure 10 . Unit 1 is isolated from network
Normal condition:
During normal condition
unit 3 is in Slave mode
unit 1
unit 2
unit 4
unit 3
Case 1:
When unit1 (Main Master) is isolated from the ring,
“unit 3” become MASTER unit. This back up MASTER
will keep network functioning normally.
unit 1
unit 2
unit 4
unit 3
A-ring and B-ring are broken on both sides of the unit 1,
which isolates “unit 1” (Main Master unit) from sending
signals to rest of the units on the ring.
