Siemens EH.75M.11. Especificaciones descargar pdf (Pagina 124)

T400 Controller Facilities Manual

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

may be stage change conditions present for Stage 2 and ROW will go there before

Stage 3.

In the example in Figure 21.6(a), the move 2-1 is not allowed, but an alternative move

into stage 0 is required in VA, UTC and CLF modes.

In these modes, Stage 0 is only used for this alternative move and so all moves out of

it, apart from Stage 1, are prohibited with an alternative move to Stage 1. During

Manual mode the move 0-1 is allowed.

10.3 IGNORE MOVES

When a move is restricted and a nominated alternative stage is too restrictive, it is

possible to programme the controller to ignore the restricted move and to look for

another satisfactory stage to change to. The stage change conditions for the original

restricted move will still be present and after another stage change has occurred they

will be considered for any further stage changes.

The ignore move facility is normally only required during modes where it is possible to

have stage change conditions present for more than one stage, i.e. VA, Priority,

Emergency Vehicle and UTC mode.

In the example in Figure 21.6(a) the move 4-5 is an ignore move during VA, UTC and

CLF mode. Stage 5 is a hurry call stage and is only used during that mode. In UTC

mode there is no force condition for Stage 5 so it will never appear but during VA and

CLF modes, a demand for Phase E during Stage 4 will try and initiate a change to

Stage 5. If the move was just prohibited, no further stage changes would take place

and so the move is programmed to be ignored.

10.4 PERMITTED MOVES

Permitted moves are not programmed they are achieved by the lack of any stage

movement restrictions.

Although a stage may only appear in one mode, there will be occasions when the stage

is active and the mode changes. Moves are therefore permitted out of it during the

other modes to allow for the stage change conditions of the new mode.

In the example in Figure 21.6(a) Stage 5 is used only during Hurry Call mode, but

once the hurry call has been serviced, Stage 5 will be active in whichever mode takes

over. Moves to Stage 5 are restricted (Ignored) in all other modes but moves out of it

are permitted.

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Siemens EH.75M.11. Especificaciones Pagina 124