Sensoray 2600 - Manual (Page 39)

2600 Family Instruction Manual 34 Chapter 6 : Model 2608 Analog I/O Module
Returned values are not corrected to eliminate
gain and offset errors. Each returned Data word
value is scaled approximately as follows:
6.6.6 GetIntegrateds
Function Returns the most recently acquired integrated
values from the 16 external AIN channels.
Opcode 0x05
Command none
Response (Data[0]<7:0>),(Data[0]<15:8>),
... ,
(Data[15]<7:0>),(Data[15]<15:8>)
Notes Like the GetSnapshots action, this action
does not cause AIN channels to be digitized; it
simply returns previously digitized values. The
ages of the returned values range from 0 to 16
milliseconds.
The differences between these data values and
those returned by GetSnapshots is the age of
the data and the amount and nature of the applied
filtering.
6.6.7 GetInternals
Function Returns the most recently acquired integrated
values from all internal reference standards and
the on-board temperature sensors.
Opcode 0x0B
Command none
Response (LgMax[0]),(LgMax[1]),
(LgMin[0]),(LgMin[1]),
(HgMax[0]),(HgMax[1]),
(HgMin[0]),(HgMin[1]),
(Temp[0][0]),(Temp[0][1]),
(Temp[1][0]),(Temp[1][1]),
(Temp[2][0]),(Temp[2][1]),
(Temp[3][0]),(Temp[3][1]),
(Temp[4][0]),(Temp[4][1]),
(Temp[5][0]),(Temp[5][1]),
(Temp[6][0]),(Temp[6][1]),
(Temp[7][0]),(Temp[7][1])
Notes This action does not cause the reference
standards to be digitized; it simply returns the
previously digitized standards values. The
returned data are the uncorrected binary values
obtained from the digitizer. These values are not
valid immediately following a module reset;
allow at least 32 milliseconds following a module
reset before executing this action.
All reference standards are measured at low gain,
except HgMax and HgMin, which are measured
at high gain. Each returned word value—which
represents the measured output voltage produced
by the associated voltage or temperature
reference—is scaled to a resolution of
approximately 305 µV (low gain) or 3.05 µV
(high gain).
Reference voltage values may be used to
normalize measurements from external AIN
channels and the on-board temperature sensors so
as to eliminate circuit gain and offset errors.
Refer to the distribution media middleware
documentation for details.
6.6.8 SetLineFreq
Function Declares the power line frequency used in the
application environment.
Opcode 0x0C
Input Range Data Scaling, Per Bit
±10 V range 305.1758 µV
±100 mV range 3.051758 µV
Parameter Function
Data Word array containing the acquired
values from all analog input channels.
Data ordering begins with channel 0
and progresses by increasing channel
number. All word values are returned
least significant byte first.
Parameter Function
LgMax +10V ref @ low gain, LSB first.
LgMin 0V @ low gain, LSB first.
HgMax +100mV ref @ high gain, LSB first.
HgMin 0V @ high gain, LSB first.
Temp[0] Chan 0-1 temperature, LSB first.
Temp[1] Chan 2-3 temperature, LSB first.
Temp[2] Chan 4-5 temperature, LSB first.
Temp[3] Chan 6-7 temperature, LSB first.
Temp[4] Chan 8-9 temperature, LSB first.
Temp[5] Chan 10-11 temperature, LSB first.
Temp[6] Chan 12-13 temperature, LSB first.
Temp[7] Chan 14-15 temperature, LSB first.