A-6 824 Reference Manual 9/29/09
824 Network, Addressing Commands
NOTE: Hexidecimal notation: The dol-
lar symbol “$” is used to indicate hexi-
decimal notation. Example: $1A is the
hexidecimal notation for the decimal
value of 26.
The addressing of multiple 824s on a
RS-422 network has been enhanced
so as to allow binary data blocks to
be sent to the 824 (and not be
interpreted as an address), to
automatically identify all 824s on the
network, and to control the baud rate
from the computer more easily. The
command details follow:
Command Description
0 Address 0 ($80), Broadcast, will enable addressing of all 824s on the net in a
broadcast receive mode. Only the 824 with address 1 will respond; all will
receive the command.
127 Address 127 ($FF), Address All, will enable all 824s to receive and respond to
commands; in other words it will disable the addressing feature of all 824s on
the net. Useful when only one device is connected.
126 Address 126 ($FE), Disable All, will disable all 824s and none will respond to
commands received. This is useful when trying to communicate with one device
on the net that has addressing disabled by having its address set to zero.
125 Address 125 ($FD), Lock, will lock the current addressing of all 824s on the net
so that binary setting data may be sent to the currently addressed 824. To cancel
the lock so that addressing may be changed a <break> is sent.
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