Measurement-computing DaqBoard 3000USB Series Manuel d'utilisateur télécharger pdf (Page 91)

Using the Hysterisis Function

Update Mode: N/A, the Hysterisis option has a forced update built into the function

Criteria Used: window criteria for above and below the set limits

The figure below shows analog input Channel 3 with a setpoint which defines two 16-bit limits, Limit A

(High) and Limit B (Low). These are being applied in the hysteresis mode and DAC Channel 0 will be

accordingly.

In this example Channel 3’s analog input voltage is being used to update DAC0 as follows:

o When outside the window, low (below Limit B) DAC0 is updated with 3.0V. This

update will remain in effect until the analog input voltage goes above Limit A.

o When outside the window, high (above Limit A) DAC0 is updated with 7.0V. This update will

remain in effect until the analog input signal falls below Limit B. At that time we are again

outside the limit “low” and the update process repeats itself.

Hysteresis mode can also be done with P2C digital output port, or a timer output, instead of a DAC.

Limit A

Limit B

Detection

DAC0

Channel 3 in Hysterisis Mode

Ch 3 Analog

Input Voltage

DaqBoard/3000 Series User’s Manual 887794 Setpoint Configuration for Output Control 6-9

1 2 ... 86 87 88 89 90 91 92 93 94 95 96 ... 127 128

Pas de commentaire

Measurement-computing DaqBoard 3000USB Series Manuel d'utilisateur Page 91