Range control of the hsc – Rockwell Automation 1769-L23E-QB1B_L23E-QBFC1B_L23-QBFC1B CompactLogix Packaged Controllers Quick Start and User Manual User Manual
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Publication IASIMP-QS010B-EN-P - October 2009
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Embedded I/O Chapter 3
Range Control of the HSC
The range control feature of the embedded HSC lets you program your HSC
to operate independently of the controller’s logic program.
Four dynamically-configurable ranges are available. The four ranges can be
configured to compare a low limit and high limit to the current count value of
a designated counter. Using output tag control logic, you can specify a range to
be active when the designated counter's current count value is equal to or
between the range low/high limit values you specified. Or, you can specify that
the range be active when the designated counter's current count value is equal
to or outside of the range's low/high limit values.
Using the Range0to3 output tags, you then specify a combination of HSC
outputs (options include 4 real outputs and 12 virtual outputs) to be turned
ON when that range is active.
Any combination the HSC counter outputs (0...15) may be configured to
transition to ON when the range is active. If an individual HSC output is
selected to be ON by more than one of the ranges, then the state of that
output is controlled through the use of a logical OR function in HSC hardware
to process the range results for the ranges that have designated the output to
be under HSC range control.
If any range that controls an output has transitioned to the active state, then
that output transitions to the ON state. The output transitions to OFF only
when all of the ranges that control the output have transitioned to the inactive
state.
For more information about configuring the ranges, see the HSC range tag
descriptions in the
table on