
5-6 AnaWin User’s Guide
Setting Channel Parameters
FIGURE 5-8
Channel Setup Control Tab
In addition, the Control tab also includes the following fields that allow
you to set control parameters for output #1 and output #2:
Prop Band: The range in which the proportioning function of the
control is active.
Integral: A control action that automatically eliminates offset, or droop,
between setpoint and actual process temperature.
Derivative: A control action that anticipates the rate of change of the
process and compensates to minimize overshoot and undershoot. This
value is measured in seconds.
PID Filter: The time constant for the output filter. The heat or cool
output filter prevents oscillations by dampening the output’s response.
The output responds to a step change by going approximately 2/3 of its
final value within the number of scans that are set.
For loops with a ramp/soak profile assigned, the following information
is displayed:
Tim Rem: Time remaining for the profile.
Total Time: Time the profile has been running.
Seg Time: Time remaining in the current segment.
Cycle: Cycle number; the cycle’s number out of the total cycles. Refer
to “Ramp Soak Setup,” later in this chapter, for further details about the
ramp/soak feature.
Alarm
Use the Alarm tab, shown in Figure 5-9, to enable alarms, set alarm
limits and alarm delays, customize alarm messages, and assign digital
outputs to alarms.
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