Siemens EH.75M.11. Especificaciones descargar pdf (Pagina 87)

T400 Controller Facilities Manual

667/EB/20200/000 Page 9-27 Issue 9

9.4.3(e) Priority Units Inhibited (Priority Mode Only)

When a Priority Phase gains ROW, it is possible to inhibit specified Priority Units

(including the one at ROW) for a specified time.

9.4.3(f) Revertive Priority Demands To Start Inhibit Timer (Priority Mode Only)

This facility allows the Priority Units inhibited facility to be activated when a Priority

Phase gains ROW due to a Revertive Priority Demand being present.

9.4.3(g) Allowed VA Demands For Phases

When a Priority Demand is being actioned all VA demands are normally disregarded

until after Priority or Emergency Vehicle mode have finished.

However, it is possible to specify phases, which appear cyclically before the Priority

phase, which may have any VA demands present to be actioned before the Priority

Demand.

The specified phases will only run for their minimum green period regardless of any

VA extensions present.

If the Priority Phase is a pedestrian phase, Allowed VA Demands should not be used.

(N.B. This facility is not compatible with priority phases of type 2 appearance, i.e. if

the stage in which the priority phase appears is active when a priority demand is

received, the priority phase appears immediately. At the same time unwanted “enforced

VA demands” may be entered, which may cause unnecessary timing of priority

maximum and unnecessary stage changes when the priority phase terminates.)

9.4.3(h) Enforce VA Demands For Phases

This facility works on the same basis as Allowed VA Demands for Phases except that

VA demands for the specified phases are inserted to ensure that the specified phases

will run.

(N.B. This facility is not compatible with priority phases of type 2 appearance, i.e. if

the stage in which the priority phase appears is active when a priority demand is

received, the priority phase appears immediately. At the same time unwanted “enforced

VA demands” are entered, which may cause unnecessary timing of priority maximum

and unnecessary stage changes when the priority phase terminates.)

9.4.3(i) Monitor Time

The SVD’s may not operate for long periods due to their normal use and so are not

considered for the Detector Fault Monitor (DFM). (See section 15.9).

In order to monitor the input to a Priority Unit, a Monitor Timer is used. The

operation of the Monitor Timer is different when in Priority mode to that in

Emergency Vehicle mode.

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Siemens EH.75M.11. Especificaciones Pagina 87