Unit, Ring - Ring Sequences (MM->1->2->4)
 

Seq# Ring Sequence.of.Phases       1    1   1 2 3 4 0 0 0 0                  1    2   5 6 7 8 0 0 0 0    1    3   0 0 0 0 0 0 0 0    1    4   0 0 0 0 0 0 0 0    2    1   1 2 3 4 0 0 0 0    2    2   6 5 7 8 0 0 0 0    2    3   0 0 0 0 0 0 0 0    2    4   0 0 0 0 0 0 0 0 .....   16    1   2 1 4 3 0 0 0 0   16    2   6 5 8 7 0 0 0 0   16    3   0 0 0 0 0 0 0 0   16    4   0 0 0 0 0 0 0 0

Naztec ver 50/60/61 controllers provide 16 sequences (2.8.3 MAXIMUM SEQUENCES) with 1 to 4 rings per sequence (2.8.1 MAXIMUM RINGS).  16 sequence combinations provide every combination of leading and lagging left-turns for an 8 phase, dual ring controller.

Ring sequences and Concurrent Phases (MM->1->1->4) work together the sequencing of the controller.  Concurrent phases in separate rings service together, but each ring must terminate together at a "phase barrier" before a new concurrent phase group can be serviced..

The Ring Sequence menu above contains 2 NTCIP objects that are "read-only" values (shown in red) -  Seq# (2.8.3.1 SEQUENCE NUMBER) and Ring (2.8.3.2 SEQUENCE RING NUMBER).   Up to 8 phases may be assigned to each ring (2.8.3.3 SEQUENCE DATA).