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5.5 ASCII Format Replies
Most commands use the ASCII format reply and may be identified by the header character (ASCII American
Standard for Coded Information Interchange). The ASCII format consists of standard keyboard alpha-numeric
characters and symbols. The
header character
is the first character in the reply from the HPB. The ASCII format
information request reply uses the following header characters:
#
ASCII format reply from an assigned address HPB.
?
ASCII format reply from a null address HPB.
Example replies to command code (cc) are: (where xx = the parameter value)
#ddcc=xx
reply from unit with an assigned address (dd).
#ddcc!xx
reply from unit with an assigned address (dd) when 1) pressure or temperature reading is
out-of-range (over/under limit = ±1%FS) or, 2) an EEPROM parity error has occurred
(pressure reading will output zero).
#ddcc=..
reply from unit with an assigned address (dd) when data is not available yet from the HPB
Request again.
?ddcc=xx
reply from a null address unit (dd).
?ddcc!xx
reply from a null address unit (dd) when 1) pressure or temperature reading is out-of-range
(over/under limit = ±1%FS) or, 2) an EEPROM parity error has occurred (pressure reading
will output zero).
?ddcc=..
reply from a null address unit (dd) when data is not available yet from the HPB. Request
again.
Note: For multidrop bus mode alternate header descriptions see MO command description.
ASCII format command and reply messages contain only the set of printable ASCII characters as described in the
following list of legal characters:
*
Asterisk
~
Tilde
-
Minus
+
Plus
.
Period
=
Equal
>
Greater than
<
Less than
0-9
Numbers zero through nine
a-z
Letters a through z (not sent in replies)
A-Z
Letters A through Z
#
Pound sign
?
Question mark
{
Left brace
!
Exclamation mark
^
Circumflex
|
Bar
}
Right brace
@
At/each
&
And/ampersand
%
Percent
$
Dollar sign (used before a command to
stop, or suspend, continuous HPB
transmissions while manually typing
commands)
Space, or Blank