Siemens EH.75M.11. Especificaciones descargar pdf (Pagina 127)

T400 Controller Facilities Manual

667/EB/20200/000 Page 11-2 Issue 9

If the mains fails for more than 30 days (this threshold is configurable and also

alterable via handset PFD command) then an entry is made in the fault log and the

RTC time is considered invalid. The timetable is then not available and the timetable

settings are set to their default state.

11.3 TIMETABLE RESOLUTION

CLF plans and timetable events are introduced by timetable settings to a resolution of

1 second.

11.4 BRITISH SUMMER TIME CHANGES

The RTC will advance or retard one hour at 02.00 hours on the Sunday morning of

specified weeks to allow for the time changes of British Summer Time.

When the clock is advanced, any CLF plan change or timetable event facility that

would have occurred between 2 a.m. and 3 a.m. will automatically be brought into

effect.

When the clock is retarded, a return to the conditions applicable at 2 a.m. is

automatically implemented.

The programmed week numbers may be changed via the handset using the BSA and

BSR commands.

Note: The advance and retard week numbers are not reset after being actioned and will

be effective the following year unless changed or set to ‘0’ to inhibit the facility.

11.5 MINUTE PULSE

This signal is of 5 seconds duration and begins 5 seconds before each 5 minute

boundary of the RTC. It is available to special conditioning and therefore may be

allocated to a normal T400 output Port bit. Conditioning bit goes active for duration of

pulse.

1 2 ... 122 123 124 125 126 127 128 129 130 131 132 ... 307 308

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Siemens EH.75M.11. Especificaciones Pagina 127