Dwyer 8600 User Manual
Page 23
December, 1998
Page 23
949-1277-3
not within the Proportional Band.
ArtE
Approach Rate Time: Select OFF, 0.01 to 99.99 minutes. The
function defines the amount of Rate applied when the input is
outside of the Proportional Band. The ArtE time and the rtE time
are independent and have no effect on each other. To increase
damping effect and reduce overshoot set the approach rate time
for a value greater than the natural rise time of the process (natural
rise time = process value time to set point).
Fint
Fuzzy Logic Intensity: Select 0 to 100%. 0% is OFF (disables Fuzzy
Logic). The function defines the amount of impact Fuzzy Logic will
have on the output.
Fbnd
Fuzzy Logic Error Band: Select 0 to 4000 °F, °C, or counts. Sets the
bandwidth of the Fuzzy Logic. Set Fbnd equal to PID proportional
band (Pb1) for best results.
FrtE
Fuzzy Logic Rate of Change: Select 0.00 to 99.99 counts/second.
For best initial setting, find the count/second change of process value
near set point 1 with output ON 100%. Multiply this value by 3. Set
FrtE to this calculated value.
PEA
The Peak feature stores the highest input the control has measured
since the last reset or Power On. At Power On PEA is reset to the
present input. To manually reset the value PEA must be in the lower
display. Press the ENTER key to reset. PEA will be reset and display
the present input value.
UAL
The Valley feature stores the lowest input the Instrument has
measured since the last reset or Power On. At Power On UAL is reset
to the present input. To manually reset the value UAL must be in the
lower display. Press the ENTER key. UAL will be reset and display
the present input value.
PctO
Percent Output Feature: Select On or OFF.
On
When selected On, the HOME lower display will indicate
the output of the controller in percent. An “
o
” will appear
in the right hand side of the lower display to indicate percent
output for SP1. An "
õ
" will appear on the right hand corner
of the lower display to represent percent output for SP2, if
the control is so equipped. The display will alternate
between these values.
OFF
Percent Output display is disabled.