IOtech DaqBoard/3000 Series, User Manual

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Setpoint Configuration for Output Control 6
Overview …… 6-1
Detecting Input Values …… 6-3
Controlling Analog, Digital, and Timer Outputs …… 6-4
P2C, DAC, or Timer Update Latency …… 6-6
More Examples of Control Outputs …… 6-7
Detection on an Analog Input, DAC and P2C Updates …… 6-7
Detection on an Analog Input, Timer Output Updates …… 6-8
Using the Hysteresis Function …… 6-8
Using Multiple Inputs to Control One DAC Output
…… 6-10
The Setpoint Status Register …… 6- 11
Overview
Criteria
Input Signal is Equal to X
Action
Driven by Condition
Compare X To: Setpoint Definition: Update Conditions:
Limit A or
Limit B
•
Equal to A
•
Below A
•
Above B
(Choose 1)
X = A
X < A
X > B
True Only
:
If True, then Output Value 1
If False, then perform no action
True and False
:
If True, then Output Value 1
If False, then Output Value 2
Window*
(non-Hysterisis
Mode)
•
Inside
•
Outside
(Choose 1)
B < X < A
B > X; or X > A
True Only
:
If True, then Output Value 1
If False, then perform no action
True and False
:
If True, then Output Value 1
If False, then Output Value 2
Window*
(Hysterisis Mode)
•
Above A
•
Below B
(Both conditions
are checked when
in Hysterisis Mode)
X > A
X < B
Hysterisis Mode (Forced Update)
:
If X > A is True, then Output Value 1 until
X < B is True, then Output Value 2.
If X < B is True, then Output Value 2 until X > A
is True, then Output Value 1.
This is saying: (1) If the input signal is outside
the window “high”, then Output Value 1 until the
signal goes outside the window “low” and (2) if
the signal is outside the window low, then
Output Value 2 until the signal goes outside the
window “high.” There is no change to the
detect signal while within the window.
*
Value A defines the upper limit of the Window and Value B defines the low limit.
Using Setpoints to Control Outputs
DaqBoard/3000 Series User’s Manual
908794
Setpoint Configuration for Output Control 6-1