West Control Solutions N8100 - Manual (Page 9)

1.8 PRE-TUNE FACILITY
This facility may be used to set the Controller’s PID parameters to values which are
approximately correct, in order to provide a base from which the Self-Tune facility
may subsequently optimise tuning. Pre-Tune may be engaged (and subsequently
dis-engaged) as follows:
NOTE: The Pre-Tune facility will not engage if (a) the setpoint is currently
ramping, (b) the process variable is within 5% of input span of the setpoint,
or (c) an erroneous key sequence is used.
O054-1 1-5
59125