Figure 5-7 If Either Ring Is Broken At Multiple Points - Hitachi SD.LINK User Manual

If either ring is disconnected at multiple points
If the primary ring is broken at multiple points as shown in Figure 5-7, data transmission from
the secondary ring at the points of breakage stops (designated by dotted lines) and data from
module C can no longer be received. In this situation, data is transmitted and received among
modules A, B, and C. Transmission via the secondary ring resumes when the primary ring
recovers from the breakages.
* A to D denote an SD.LINK module each.

Figure 5-7 If Either Ring Is Broken at Multiple Points

Secondary ring
A
Primary ring
D
5-9
5 PROGRAMMING
B
C