West Control Solutions KS 92-1 - Manual (Page 21)

3.5.8 Self-tuning start
Start condition:
w For process evaluation, a stable condition is required. Therefore, the
controller waits until the process has reached a stable condition after
self-tuning start.
The rest condition is considered being reached, when the process value
oscillation is smaller than
± 0,5% of (rnG.H - rnG.L).
w For self-tuning start after start-up, a 10% difference from (SP.LO ... SP.Hi)
is required.
g
Self-tuning start can be blocked via BlueControl
®
(engineering tool) ( P.Loc).
Strt = 0 Only manual start by pressing keys Ù and È
simultaneously or via interface is possible.
Strt = 1 Manual start by press keys Ù and È simultaneously
via interface and automatic start after power-on and detection
of process oscillations.
3.5.9 Self-tuning cancellation
By the operator:
Self-tuning can always be cancelled by the operator. For this, press Ù and È
key simultaneously.With controller switch-over to manual mode after self-tuning
start, self-tuning is cancelled. When self-tuning is cancelled, the controller will
continue operating using the old parameter values.
By the controller:
If the Err LED starts blinking whilst self-tuning is running, successful self-tuning
is prevented due to the control conditions. In this case, self-tuning was cancelled
by the controller. The controller continues operating with the old parameters in
automatic mode. In manual mode it continues with the old controller output va-
lue.
Operation
KS 90-1 / KS 92-1 21 Self-tuning
Ada LED status Signification
blinks Waiting, until process calms down
lit Self-tuning is running
off Self-tuning not activ or ended
1200
1199
°C
°F
SP.2 SP.E
para
func
Ada
Err