Siemens EH.75M.11. Especificaciones descargar pdf (Pagina 39)

T400 Controller Facilities Manual

667/EB/20200/000 Page 3-10 Issue 9

3.6.1 Minimum Green Thresholds

Minimum Green times have range limits for each phase (i.e. each phase has an upper

and lower minimum green time associated with it.)

3.6.2 Intergreen Thresholds

Intergreen times have a common maximum limit but there is an individual lower limit

associated with each intergreen time.

3.7 CONDITIONS OF APPEARANCE

If more than one phase is allocated to a stage, it may be required to make the

appearance of some of them conditional so that they will only appear if demanded. The

condition will apply in all the stages to which the phase is allocated.

There are four different types of appearance. The normal one is Appearance Type 0.

3.7.1 Appearance Type 0

This is the normal type of condition with the phase always appearing whenever its

associated stage runs. If more than one Type 0 phase is allocated to the stage they will

all appear regardless of which phase was demanded. In the intersection illustrated in

Figure 21.2 and Figure 21.3, Phases A and B will always appear whenever Stage 1

runs, Phases B and C when Stage 2 runs, Phases E and F when Stage 3 runs and

Phases F and H when Stage 4 runs.

3.7.2 Appearance Type 1

The phase will only appear whenever its associated stage runs if a demand for it is

inserted before the start of the interstage. If the demand is inserted after this point it

will be stored and can be configured using a special software algorithm either:

a) to be ignored if there are other demands present and not influence the

next stage change and then to be considered for subsequent stage

changes; but if there are no other demands it will cause a stage change

to a stage which honours the demands.

b) Not to be ignored and influence the next stage change.

The algorithm may be accessed using the handset command PMV.

The normal use for this type of condition is for a pedestrian phase as illustrated in

Figure 21.2 & Figure 21.3 with Phase G. If, for example, Phase G hadn’t appeared in

Stage 1 and was subsequently demanded, it would then appear in Stage 2 when it runs,

although under normal circumstances the demand for Phase G wouldn’t cause the

stage change.

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Siemens EH.75M.11. Especificaciones Pagina 39