Siemens EH.75M.11. Especificaciones descargar pdf (Pagina 168)

T400 Controller Facilities Manual

667/EB/20200/000 Page 17-8 Issue 9

17.10.1 UTC Facilities (Control Bits)

UTC Ped. Inhibit (PV)

This input signal prevents the pedestrian phase on a pelican. When PV is released,

vehicle extensions will be inhibited for a period specified via the handset (UIE). Even if

PV is reapplied during this period it will have no effect.

UTC Ped. Demand (PX)

This input signal puts in a request for the pedestrian stage of a pelican.

Vehicle Extensions Inhibit (SC)

This input signal forces the controller to ignore all vehicle extension requests. To

ensure safety of operation, the vehicle to ped. change becomes a UTC. all-red change

rather than a gap change. The UTC all-red change time is alterable via the handset.

Real Time Clock Sync.

This input causes the Real Time Clock to synchronise to 12:00:00 hrs each day.

UTC Transmission Confirm (TC) or Takeover Control (TO)

The TC signal, if allocated to an I/O line, is transmitted to the controller from the OTU

if valid data has been received by the OTU. The TO signal is very similar in effect

except that it is transmitted from the UTC Central Office and not from the OTU and it

too signifies that valid data is being sent by the UTC Central Office. The presence of

either of these signals disables the Local Link facility.

Computer Control LED on the Manual Panel

The rules governing the illumination of this LED are as follows:

(1) If the TC/TO function has not been assigned to an IO Line then the presence of PV

alone lights this LED.

(2) If TO has been assigned to an I/O line then the LED is only illuminated when TO is

present in conjunction with PV.

(3) If TC has been assigned to an I/O line and selected to control the LED, then the

presence of this TC signal alone lights the LED.

(4) If TC has been assigned to an I/O line and selected not to control the LED, then

the LED is illuminated only when both PV and TC are present (as in case 2).

Switch to FVP mode

This input disables Pelican VA mode and thus forces the controller to run in FVP

mode. This signal only has an effect when the Pelican is running VA mode which

happens when:

(a) VA operation is selected via the handset.

AND (b) the mode requested by the VA select button on the manual panel is VA.

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Siemens EH.75M.11. Especificaciones Pagina 168