Datum bc632D, Руководство пользователя

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APPENDIX B
B-10 bc632D Wall Mount LED Display (Rev A) Datum Inc
Where s is the step (1-8).
B.5.2.13 SET
The bc632d can be used as a standalone timer for countdown/countup operations. The Set command
is used to initialize countdown operation and set the starting time. Unlike the Time command, Set does
not affect the contents of the internal clock. When the Set command is issued, the display will
immediately show the time that has been set. The timer does not begin running until the Start command
is received.
There are a couple of things to keep in mind when using the countdown mode. Countdown mode only
works correctly with a single-step sequence. You can not have a sequence of display formats as
described in the Section 3.3.1 of the bc632D User’s Guide. The time source should be programmed to
the Internal clock. On power-up, the display will show the contents of the internal clock, as normal.
When the display receives any of the countdown commands (Set, Start, or Stop) the display is forced
into countdown mode. From this point on, the display will not show the internal clock time. If you wish
to resume operation using the internal clock, you can send a Halt command followed by an End
command. This sequence will reset the display to normal operation.
The only display formats that shows the plus/minus sign are formats 1 and 6 (C DDD HH:MM:SS). The
first character is replaced with a plus or minus sign.
The Set command can also be used to operate the display in a static mode, where the display itself does
not do any timekeeping. A computer can be programmed to send a Set command once each second to
update the display.
The format of the Set command is:
SET -ddd hh:mm:ss
Where:
- is a plus or minus sign (hyphen).
ddd is days in ASCII.
hh is hours.
mm is minutes.
ss is seconds.