Pressure Systems, Inc. Model 9116 User’s Manual
Page 72
www.PressureSystems.com
READ HIGH-PRECISION DATA (Command ‘r’)
Purpose:
Returns the most recently acquired
engineering-unit
pressure
data for the
specified channels. Each datum returned in the response will be in the specified
high-precision data format.
Command
“
r
ppppf
”
‘
r
’ is the
command
letter
‘
pppp
’ is the
position
field
‘
f
’ is the
format
field
Response
“
dddd.. dddd
”
‘
dddd
’ are
datum
fields, each with leading
space
(except
f
= 7 or 8).
Description:
The 4-character hex
position
field (
pppp
) specifies a 16-bit binary bit-map, with
each bit (set to 1) specifying a particular channel number (16-1, left-to-right).
Models 9021 and 9022 use only channels 12-1.
The
1-character
format
field (
f
) specifies the format of each
data
field (
dddd
) that
will be returned in the requested response.
The first datum returned in the
response will be for the highest channel number specified.
Each (non-
binary) datum will be preceded by a
space
character (except in the case of
f
= 7).
Some formats may not be applicable to the specific type of data being requested.
Valid formats are shown in the following table:
f
converts each internal response
datum
value from . . .
max. char.
0 single binary float
to 7-10-digit signed decimal “ [-xxx]x.xxxxxx”
13
1 single binary float
to 8-digit hex integer “ xxxxxxxx”
9
2 double binary float
to 16-digit hex integer “ xxxxxxxxxxxxxxxx”
17
5 single binary float
to long integer (EU*1000) then to 8-digit hex integer
9
7 single binary float
to single binary float (big endian: msb first)
4
8 single binary float
to single binary float (little endian: lsb first)
4
Unless the EU conversion scalar is altered, the returned data will be in units of
psi
