Datum bc632D, User Manual

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bc632D CONTROL BUS PROTOCOL
Datum Inc bc632D Wall Mount LED Display (Rev A) B-11
B.5.2.14 START
The Start command is used to begin countdown time-keeping. The display will begin counting from the
preceding time. The time begins counting again within one millisecond after the carriage return at the
end of the Start command.
Start will also restart time-keeping after a Stop command. Since the stop command saves the fractional
part of the second, the start command can begin within one millisecond of where the Stop occurred.
The format of the Start command is:
START
B.5.2.15 STOP
The Stop command will hold the countdown time on the display and freeze the time, including the
fractional part of a second. It can also be used to initiate the countdown mode of operation before a
Set command is issued.
The Stop command is simply:
STOP
B.5.2.16 ECHO
The Echo command tells the display to respond with a description of its internal programming. The
format is:
ECHO
The display will respond with a series of commands that are identical with the ones described in this
appendix. An example response to the Echo command is:
ADDR aaa.
EVENT O.
MASTER 0.
SOURCE 1 9.
LABEL 1 Labeltext1.
FORMAT 1 1.
COLOR 1 1.