Read high-precision data (command 'r') – Pressure Systems 98RK-1 User Manual
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Pressure Systems, Inc. 98RK-1 & 9816 User’s Manual©
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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[p]ppppf”
‘r’ is the command letter
‘[p]pppp’ is the position field
‘f’ is the format field
Response
“ dddd[ dddd]...”
‘ dddd’ are datum fields, each with a leading space (except f =7).
Description: The 4 or 5 character hex position field ([p]pppp) specifies a 16 or 20 bit binary bit-
map, with each bit set to 1 to specify a particular channel number (S & P external
rack channels, plus internal channels 16-1, left-to-right).
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 datum will
be preceded by a space character (except in the case of binary format 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.