Sensoray 2600 - Manual (Page 43)

Sensoray 2600 Programming Guide
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Gateway Action Scheduling
Benchmark: 0.8 ms.
Notes: This function, as well as S26_Sched2612_SetVoltages() , should be called before calibrating or acquiring
digitized data from an analog input channel. Digitized data may be fetched from the 2612 immediately after calling
this function; no delay is required.
Example: // Set measurement mode on the 2612 at MM number 0, IOM port 10, channel 2.
// Set the OSR to 32768 and enable the speed multiplier.
void *x = S26_SchedOpen( 0, 1 );
S26_Sched2612_SetMode( x, 10, 2, OSR_32768 | MODE_2X );
S26_SchedExecute( x, 1000, 0 );
7.6.4 S26_Sched2612_SetVoltages()
Schedules the programming of all power output channels on a model 2612 IOM.
Prototype: u32 S26_Sched2612_SetVoltages( XACT x, IOMPORT IomPort, u8 volts );
Returns: Error code as described in section 5.5. Zero is returned if the operation was successful.
Benchmark: 0.3 ms.
Notes: This function establishes the power output voltages on all channels. These output voltages are typically used to
supply excitation to sensors such as strain gauges.
This function, as well as S26_Sched2612_SetMode() , should be called before calibrating or acquiring digitized
data from an analog input channel. Since a change in the output voltage will cause a step change in the associated
input channel’s applied voltage, there will be a delay of one conversion time before valid digitized data becomes
available.
Example: // Set reference voltage on the 2612 at MM number 0, IOM port 10:
// channel 0 to 2V, channel 1 to 1.25V, channel 2 to 5V and channel 3 to 3V.
void *x = S26_SchedOpen( 0, 1 );
S26_Sched2612_SetVoltages( x, 10,
REF_OUT_2V |
( REF_OUT_1V << 2 ) |
( REF_OUT_5V << 4 ) |
( REF_OUT_3V << 6 )
);
S26_SchedExecute( x, 1000, 0 );
7.6.5 S26_Sched2612_GetValues()
Schedules the fetching of the digitized values of all analog input channels on model 2612 IOM.
Parameter Type Description
x void * Transaction handle obtained from S26_SchedOpen().
IomPort u8 The IOM port number (on the MM) to which the target IOM is connected.
volts u8 A collection of four, two-bit fields. Each field specifies the output voltage for a power output
channel.
Two-bit field for each channel has to be set to one of the REF_OUT_xV values. Bits 0,1 are
responsible for channel 0, bits 2,3 - for channel 1, bits 4,5 - for channel 2 and bits 6,7 - for
channel 3.