Figure 4.7-S2 Speed Shift Command Example; Figure 4.8-S5 Speed Shift Command Example - Honeywell HPB User Manual

HPB/HPA User Manual
Figure
4.7—S2
Speed
Shift
Figure 4.9 shows the effect of the deadband setting in the DS command. If a deadband of ±0.02% FS is selected,
then the pressure output will not change reading as long as it is within this limit (±0.00352psi for a 17.6 psi unit).
If the pressure exceeds or falls below this threshold, the pressure reading will track the actual pressure value. It
will continue to track the pressure value until there is no change again within the threshold limit.
Figure 4.10 illustrates the effect of the Idle Count (IC) command for four different pressure curves. The IC
command does nothing more than skip over a set number of readings. If the idle count were set to IC=4, then
after a pressure output reading, the HPB would not output the next 4 readings and the fifth one would become the
next output reading. This feature allows the reading rate to be established different from the integration time. This
feature is useful for minimizing the communications traffic on a network of many HPB units.
20
Command Example
Figure 4.8—S5 Speed Shift Command Example
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