Measurement-computing Personal Daq/3000 Series Manual de usuario descargar pdf (Pagina 65)

The Setpoint Status Register

Regardless of which software application you are using with a Personal Daq/3000 Series device, a setpoint

status register can be used to check the current state of the 16 possible setpoints. In the register, Setpoint 0

is the least significant bit and Setpoint 15 is the most significant bit. Each setpoint is assigned a value of 0

or 1. 0 indicates that the setpoint criteria is not met, i.e., the condition is false. 1 indicates that the criteria

has been met, i.e., the condition is true. Related information is provided in the overview (pages 6-1 and

6-2.)

In the following example, the criteria for setpoints 0, 1, and 4 is satisfied (True); but the criteria

for the other 13 setpoints has not been met.

Setpoint # 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

True ( 1 )

False ( 0 )

0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 1

<<< Most Significant Bit Least Significant Bit >>>

From the above table we have 10011 binary, or 19 decimal, derived as follows:

Setpoint 0, having a True state, shows “1;” giving us decimal “1.”

Setpoint 1, having a True state, shows “1;” giving us decimal “2.”

Setpoint 4, having a True state, shows “1;” giving us decimal “16.”

For proper operation, the Setpoint Status Register must be the last channel in the scan

list.

Personal Daq/3000 Series User’s Manual 887894 Setpoint Configuration for Output Control 6-11

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 85 86

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Measurement-computing Personal Daq/3000 Series Manual de usuario Pagina 65