In the 19990820 release, the MEIFilterGainPID
and MEIFilterGainPIV structures
were expanded to support High and Low output limits for PID and
PIV algorithms. The "High" output limit prevents the filter output
from exceeding the "High" value. The "Low" output limit prevents
the filter output from falling below the "Low" value. This feature
will allow an application to have upper and lower limits which are
not centered on zero volts. If the "High" and "Low" values have
the same sign, then the output will be limited to either the positive
or negative range bounded by "High" and "Low".
The standard Output Limit is still valid. The controller will simultaneously
use the standard Output Limit and the High / Low Output Limits to
bound the output. The limits, (standard or high or low) that are
closest to zero will be used as the boundary for the output.
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