Siemens EH.75M.11. Spezifikationen PDF herunterladen (Seite 49)

T400 Controller Facilities Manual

667/EB/20200/000 Page 6-3 Issue 9

The condition in (c) is normally disabled for individual phases at the time of

configuration. Speed extensions will still request extra clearance because of the

operation of condition (a).

An extra clearance period will be given under any mode of control, i.e. manual, VA,

fixed time, CLF, UTC, vehicle priority or hurry call. Its effect is to increase all the

inter-green timings for the phase which is being given the extra clearance, and also to

increase the phase change delay times for gaining phases.

This latter increase is computed as the largest of the extra clearance times currently

applied for that stage to stage move.

Phase change delay times for individual gaining phases may be configured so that they

are not increased when a specific phase is requesting an extra intergreen due to

SDE/SA.

NOTE: If the inter-green is not dependent on the SDE/SA phase inter-green time

(because another losing phase has a longer inter-green time) then the extra clearance

period may not actually delay the appearance of the gaining phase.

The range of the timing period for the extra-clearance is 0 to 50 seconds in 1 second

steps for each SDE/SA phase.

The programmed value may be changed via the handset using the SCT command.

6.5 SDE/SA PARALLEL STAGE STREAMING FACILITIES

If a phase with SDE/SA is requesting extra clearance and so increasing the time in its

associated intergreen timer, it is possible to specify at configuration which delay timers

(for phases gaining ROW) are to also be increased. In this way, it is possible to specify

delay timers just for the phases appearing in a particular stream, whilst not increasing

those in other streams.

6.6 SDE/SA ON GREEN ARROWS

Where these are single aspect, the red and amber drives of the Phase Switch PCB are

not available to drive other green arrows, as they must be programmed as 3-aspect to

get the amber signal to meet the requirement of 6.4, even though only the green arrow

is connected. (See section 18).

6.7 COMMON APPROACH LANES

Where an assessor is associated with a number of phases, then all the phases that

require speed extensions and extra clearance periods can be driven from that assessor.

If this is required then the phase termination’s should not be staggered.

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Siemens EH.75M.11. Spezifikationen Seite 49