Siemens EH.75M.11. Especificaciones descargar pdf (Pagina 162)

T400 Controller Facilities Manual

667/EB/20200/000 Page 17-2 Issue 9

17.1.2(c) Pre-timed Maximum Vehicle Green

This is an alternative form of VA mode if selected, the controller will start the max.

vehicle green timer as soon as vehicle green is gained, instead of waiting for an

opposing/pedestrian demand. If no pedestrian demand occurs before the max timer

expires the controller will rest in vehicle green until a pedestrian demand is inserted

which it will then service immediately by completing a “max change” to pedestrian

green, even if a vehicle is inserting a continuous extension. If a pedestrian demand is

inserted before this max. timer has expired there can still be a gap change if there are

no vehicle extensions present.

17.1.3 Short Vehicle Green via UTC

When operating in Fixed Vehicle Period mode the Pelican can be forced, via the UTC,

to run VA mode; which will give a vehicle green of 6 to 15 seconds (assuming no

extensions). The following steps need to be taken:

(1) Enable VA mode via the handset and manual panel.

(2) Invert the inputs allocated to ‘UTC switch to FVP’ signal (UTCFVP) using the

appropriate handset command.

(3) On setting UTCFVP active the Pelican will be forced to stop running Fixed Vehicle

Period and VA will become active.

17.2 PELICAN/PEDESTRIAN TIMINGS

The minimum green, maximum green and vehicle extension timings for a pelican are

alterable via the handset within ranges approved in MCE 0125 and MCE 0145. These

are different to those for MCE 0141 vehicle phases and thus they are accessed by

different handset commands.

There are other alterable timings for the all-red time from vehicle green to ped. green

in UTC and Local Link modes following the removal of PV and PV1 respectively. If

both of these signals occur simultaneously then the UTC signal PV always overrides

the Local Link signal.

If SDE/SA is selected (via the handset) and fitted on the controller, then all of the

vehicle green to pedestrian green all-red times are fixed at three seconds.

If there has been a DFM failure on the controller, then a maximum all-red time is

included in the change from vehicle green to pedestrian green for safety reasons.

If the Vehicle Detector Checking facility has been enabled and there has been no

activity on one or more of the vehicle extension during the vehicle green period, then a

maximum all-red time is included in the change from vehicle green to pedestrian green

for safety reasons.

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