IOtech DaqBoard/3000USB Series, User Manual

Page: 93 / 128

The Setpoint Status Register
Regardless of which software application you are using with a DaqBoard/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.
DaqBoard/3000 Series User’s Manual
887794
Setpoint Configuration for Output Control 6-11