Measurement Specialties 9116 user manual Read HIGH-PRECISION Data Command ‘r’, Rppppf

Models: 9116

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Pressure Systems, Inc.

Model 9116 User’s Manual

 

 

READ HIGH-PRECISION DATA (Command ‘r’)

Purpose: Returns the most recently acquired engineering-unitpressure 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

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Measurement Specialties 9116 user manual Read HIGH-PRECISION Data Command ‘r’, Rppppf