VTI Instruments Corp.
138
EX1629 Command Set
vtex1629_get_completion_resistor
F
UNCTION
P
ROTOTYPE
ViStatus vtex1629_get_completion_resistor (ViSession
vi
, ViInt32
channel
, ViPInt32
completionResistorMode
,
ViPReal64
calibratedValue
);
F
UNCTION
P
ARAMETERS
vi
= contains a session handle to the instrument. This handle is obtained by the function and remains valid until the
session is closed.
channel
= an integer input value indicating the channel for which the completion resistor is desired. Valid input
values: 0 to 47.
completionResistorMode
= an integer return value indicating the completion resistor mode. Valid return values: 0,
3, 4, 120, or 350.
calibratedValue
= a real return value that indicates the calibrated value of the currently configured completion
resistor. This value is retrieved from the non-volatile, factory calibration file that is stored within the device.
D
ATA
I
TEM
R
ESET
V
ALUE
Not applicable to this function.
D
ESCRIPTION
This function queries and returns the mode and value of the completion resistor for a specific channel. The valid
return values are as follows:
Decimal
Value
Hex
Value
#define Symbol
Resistor Mode
calibratedValue
0
0x00
VTEX1629_COMPRES_FULL
Full
0.0 (N/A)
3
0x03
VTEX1629_COMPRES_USER
User-Defined
Actual value installed, 0.0 (N/A) otherwise
4
0x04
VTEX1629_COMPRES_OFF
OFF
0.0 (N/A)
120
0x78
VTEX1629_COMPRES_120
120 Ω
Actual value
350
0x15E
VTEX1629_COMPRES_350
350 Ω
Actual value
Referring to the “Full” completion resistor is a bit of a misnomer – it really represents a short in the leg of the bridge
circuit that contains the completion resistor. It is used in Full and Half-Bridge mode.
E
XAMPLE
ViSession instrumentHandle;
ViStatus status;
ViInt32 compmode;
ViReal64 resvalue;
…
status = vtex1629_get_completion_resistor(instrumentHandle, 0, &compmode, &resvalue);
Содержание EX1629
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