Measurement Specialties 9116 - Manual (Page 81)

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
“rppppf”
‘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