Pressure Systems 98RK-1 - Manual (Page 60)

Pressure Systems, Inc. 98RK-1 & 9816 User’s Manual©
Page 58 www.PressureSystems.com
READ HIGH-SPEED DATA (Command 'b')
Purpose : Returns the most recent scanned and averaged data from all channels of the
module as fast as possible. Data is returned directly in its internal (IEEE single-
precision float) binary form (as per implied format 7). It is used as a faster
alternative to the Read High-Precision Data ('r') command, since 'b' does not
have to parse the position or format parameters, nor does it have to transform or
encode the internal data into any other format when the response is generated.
Command
“b”
‘b’ is the command letter
Response
aaaabbbbcccc..rrrr
each 4-byte datum (e.g, ‘aaaa’) is a non-human readable 32-bit (4-byte)
big-endian binary value (format 7) representing an IEEE single-precision
internal float value.
Description:
Returns data for all of the module’s external plus internal channels, in
order highest channel number to lowest channel number. Thus, the purge
(P) rack channel reading will always be the first 4-byte (32-bit binary, big-
endian, IEEE floating-point) value (‘aaaa’) sent in the response. It is
followed by similar values (‘bbbb’, ‘cccc’, ... ‘rrrr’) for the source air (S)
rack channel, and then internal channels 16-1. Unless the EU conversion
scalar is altered, the returned data will be in units of psi.
Example:
● Send TCP/IP command to a Model 9816 module (via its “socket” connection) to return
data as fast possible:
“b”
Data from the most recent scan of all the module’s channels are returned in pure binary
form, 4-bytes per channel (big endian):
aaaabbbbcccc .. rrrrpppp
Note that this response is not shown within quotes “ ” since it is not a valid ASCII
character string.