# Ring Timing Diagram Two ring software or controller - Download as DOC

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```					                       Lesson: Preparing 16 channel diode card for 210 monitor
By: Mark Rodgers                                                                           June 10, 1998
Updated By: Darin Harper                                                                   April 20, 1999

Ring Timing Diagram: Two ring software or controller, typical for a controller with 4 or more phases
Note: A 2-4 phase controller may have only one ring.
Barrier                       Barrier

A Ring                            1               2           3              4

B Ring                            5               6           7              8

Rules:
1. No more than one active* phase per ring at a time.
2. A phase can be active with the phase vertically opposite or diagonal from it as long as it exists on the same side
of the barrier. These are called compatible phases, ex. ph1--ph5, ph1--ph6
3. Both rings must cross the barrier at the same time.
* An active phase is a movement whose green, walk, or clearance intervals are being timed by the controller
Typical Two Ring Timing Diagram with Vehicles, Peds, and Overlaps:
Barrier                                   Barrier
        Ch #              Ch #                Ch #              Ch #
1         1         2             2     3       3         4          4
1P        X         2P            13    3P      X         4P         14
OLA         9       OLA             9   OLA       9       OLA          9
A Ring           OLB        10       OLB            10   OLB      10       OLB         10
OLC        11       OLC            11   OLC      11       OLC         11
OLD        12       OLD            12   OLD      12       OLD         12
5         5         6             6     7       7         8          8
5P        X         6P            15    7P      X         8P         16
OLA         9       OLA             9   OLA       9       OLA          9
B Ring          OLB        10       OLB            10   OLB      10       OLB         10
OLC        11       OLC            11   OLC      11       OLC         11
OLD        12       OLD            12   OLD      12       OLD         12

Rules for assigning overlaps:
1. May be assigned with any phase or number of phases (parent phase or phases).
2. An overlap will be permitted by every phase compatible with the assigned phase.
Example: If OLA = 1, then OLA will be permitted with phases 1P,5,5P,6,6P too.
3. Any phase can have pedestrian phases assigned to it, limited by available outputs from the 170 and the control
program.
Monitor channels shown in the above diagram correspond to ODOT standard wired 332 cabinet with a auxiliary
output file. Cabinets exist that are not wired this way.
An “X” means that a channel must be reassigned from standard wiring to accommodate adding this output.
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Generating a diode cut-out diagram:
Collect Information about the intersection:
1.   Vehicle Phases in use
2.   Pedestrian Phases in use
3.   Parent Phase assignments for Overlaps
4.   Exclusive phase assignments
5.   Output reassignments from timing sheet
6.   Loadswitches in use from the cabinet print
7.   Verify ODOT standard wired cabinet, otherwise adjust for non-standard cabinet from cabinet print

Create an accurate ring timing diagram of the intersection:
1. Sketch an 8 phase 2 ring timing diagram or use the template included with this packet.
2. Write the monitor channel for each vehicle phase used in the space next to the phase number.
Pay close attention to outputs that have been reassigned.
3. Write the monitor channel for each pedestrian phase used in the space next to the phase number.
Pay close attention to outputs that have been reassigned.
4. Write the monitor channel for each parent phase assigned to an overlap next to the OL:
Ex.: If OLA = phase 2+7 and channel 9 is used for OLA, then write 9 for the channel number next to OLA
in the phase 2 and phase 7 boxes.
5. Draw a border around each exclusive phase for identification.

Create diode cut-out sheet from ring timing diagram:
1. Start with the phase assigned to the upper left box of the diagram.
2. List all diode pairs for each monitor channel that appear inside the same box.
3. List all diode pairs for each monitor channel that is vertically or diagonally opposite the box, except exclusive
phases.
4. Repeat steps 2 and 3 for each box on the upper row of the diagram.
5. For Phase 5 through 8, repeat step 2 only.

Note: This procedure will insure that all correct diodes are removed. There are likely to be a few duplicate diode
pairs for phases with overlaps. This is OK, since a diode can only be removed once.

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Example: Create a diode card from intersection data--Quiz Street at Test Drive

Phase 8

Phase 2ped

OLA = 1+8                                                                  Phase 2

Phase 5
Test Drive
Phase 1

Phase 6                                Quiz Street                          OLB = 4+5

Phase 6ped

Phase 8ped

Phase 4

Create a diode card for the above intersection, assuming standard ODOT wired 332 cabinet w/aux file, no
exclusive phasing or loadswitch reassignments, W4IKS software--veh=1,2,4,5,6,8 ped=2,6,8 OLA=1+8,
OLB=4+5
Create an accurate ring timing diagram of the intersection:
Barrier                                  Barrier
         Ch #                       Ch #                    Ch #          Ch #
1        _1___               2      _2___           3         _____     4    _4___
1P        _____              2P      _13__          3P         _____    4P    _____
OLA_       _9___             OL__     _____         OL__        _____   OLB_   _10__
A Ring            OL__       _____             OL__     _____         OL__        _____   OL__   _____
OL__       _____             OL__     _____         OL__        _____   OL__   _____
OL__       _____             OL__     _____         OL__        _____   OL__   _____
5        _5___               6      _6___           7         _____     8    _8___
5P        _____              6P      _15__          7P         _____    8P    _16__
OLB_       _10__             OL__     _____         OL__        _____   OLA_   _9___
B Ring            OL__       _____             OL__     _____         OL__        _____   OL__   _____
OL__       _____             OL__     _____         OL__        _____   OL__   _____
OL__       _____             OL__     _____         OL__        _____   OL__   _____

List diode pairs that will be removed from the diode card:
1--9 //1--5,1--10,1--6,1--15 // 9--5,9--10,9--6,9--15
2--13 // 2--5,2--10,2--6,2--15 // 13--5,13--10,13--6,13--15
4--10 // 4--8,4--16,4--9 // 10--8,10--16,[10—9 duplicate pair]
5--10
6--15
8--16,8--9,16--9

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Practice Sheet

Barrier                     Barrier
       Ch #                Ch #         Ch #         Ch #
1        ____        2        ____     3    ____     4    ____
1P        ____       2P        ____    3P    ____    4P    ____
OL__       ____      OL__       ____   OL__   ____   OL__   ____
A Ring          OL__       ____      OL__       ____   OL__   ____   OL__   ____
OL__       ____      OL__       ____   OL__   ____   OL__   ____
OL__       ____      OL__       ____   OL__   ____   OL__   ____
5        ____        6        ____     7    ____     8    ____
5P        ____       6P        ____    7P    ____    8P    ____
OL__       ____      OL__       ____   OL__   ____   OL__   ____
B Ring          OL__       ____      OL__       ____   OL__   ____   OL__   ____
OL__       ____      OL__       ____   OL__   ____   OL__   ____
OL__       ____      OL__       ____   OL__   ____   OL__   ____

Barrier                     Barrier
       Ch #                Ch #         Ch #         Ch #
1        ____        2        ____     3    ____     4    ____
1P        ____       2P        ____    3P    ____    4P    ____
OL__       ____      OL__       ____   OL__   ____   OL__   ____
A Ring          OL__       ____      OL__       ____   OL__   ____   OL__   ____
OL__       ____      OL__       ____   OL__   ____   OL__   ____
OL__       ____      OL__       ____   OL__   ____   OL__   ____
5        ____        6        ____     7    ____     8    ____
5P        ____       6P        ____    7P    ____    8P    ____
OL__       ____      OL__       ____   OL__   ____   OL__   ____
B Ring          OL__       ____      OL__       ____   OL__   ____   OL__   ____
OL__       ____      OL__       ____   OL__   ____   OL__   ____
OL__       ____      OL__       ____   OL__   ____   OL__   ____

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