Warner Electric CBPC-3590 - Manual (Page 17)

Warner Electric • 800-825-9050 P-291-1 • 819-0526 17
Escape Code Sequences
Escape code sequences are a group of special
commands used for bus oriented systems . Every
CBPC-3590 control recognizes these commands.
The two listed below are in addition to those
listed in the table of LOCAL and GLOBAL
commands .
(ESC) A nnn The Address command is used
to select a single control within a
system. Only that unit whose
serial I .D . number matches the
three digit serial address (nnn)
will be selected. Only that unit
will respond to subsequent
serial commands . All units, even
the addressed one, suspend
transmission .
(ESC) U The Update command instructs
the currently addressed unit to
transmit a single line only .
Protocol
The CBPC-3590 will “buffer” up to 16 Command
and Control Characters (but not Escape Code
Sequences), listed above, sent in “burst mode” .
Those characters are read, in order, every 20
milliseconds . The protocol should be careful
not to overflow the receive buffer. Additionally,
Escape Code Sequences should not be sent until
the buffer has emptied and all characters have
been processed .