Siemens EH.75M.11. Spezifikationen PDF herunterladen (Seite 22)

T400 Controller Facilities Manual

667/EB/20200/000 Page 2-2 Issue 9

Firstly, the controller sets the “suggested stage” as the current stage and the number of

new “phases & stages to get right of way” to zero ‘0’.

These two items will then be updated as the controller goes though its decision-making

process.

The following process is performed for each stage in cyclic order starting at current

stage +1.

1. Are any of the phases in the stage or the stage itself, prevented and/or deleted?

If NO, proceed to next step.

If YES, (prevented and/or deleted) try next stage in cyclic order (starting at

step 1).

2. Are there demands for phases in this stage or for the stage itself.

If YES, proceed to next step.

If NO, (i.e. phases/stage not demanded) try next stage in cyclic order (starting

at step 1).

3. Can the current stage be terminated?

i.e. will all phases which have extensions and for which the maximum green

timer has not expired keep right of way in this stage (if selected as the

“Suggested Stage”.)

If YES, proceed to next step.

If NO, add the demanded phases in this stage (or the stage itself if stage is

demanded) to “Phases & Stages to Get right of way” (for checking later). Then

try next stage in cyclic order (starting at Step 1).

4. Will all demanded phases which appear in previously checked stages and any

specifically demanded stages previously checked (i.e. “Phases & Stages to Get

right of way”) get right of way, be serviced by this stage?

(N.B. Obviously if a previously checked stage is itself specifically demanded,

no other stage can satisfy the demand and the answer to above question will be

NO. Stage demands are normally only inserted from special conditioning or

Modes of operation where specific stages are requested, i.e. CLF, UTC, Hurry

Call, Fixed Time, Manual or Manual Step-On.)

If YES, proceed to next step.

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Siemens EH.75M.11. Spezifikationen Seite 22