West Control Solutions Pro-8 - Manual (Page 17)

3.5.2 Self-tuning start
g
Self-tuning start can be disabled using BlueControl
®
(engineering tool)
( Conf/Othr/IAdA).
Starting the self-tuning:
Self-tuning is started by pressing the Ù and È keys simultaneously, or via the
interface. If parameter
Conf/Cntr/Strt is set to 1 self-tuning starts also af-
ter power-on and when detecting process value oscillations.
3.5.3 Self-tuning cancellation
w
By the operator:
Self-tuning is cancelled by pressing the Ù and È keys simultaneously.
Switching over to manual operation also causes cancellation of the self-tu-
ning procedure.
After self-tuning cancellation, the controller continues operating using the pa-
rameters valid prior to self-tuning start.
w
By the controller:
If the Err LED starts blinking during self-tuning, successful self-tuning is pre-
vented due to the control conditions. In this case, self-tuning was cancelled
by the controller. The controller continues operating using the parameters va-
lid before self-tuning start.
If the self-tuning method with step attempt was used and self-tuning was
started from the manual mode, the controller uses the last valid correcting va-
riable after self-tuning start, until the self-tuning error message is acknowled-
ged. Subsequently, the controller continues operating using the parameters
valid before self-tuning start.
Causes of cancellation:
® Page 8: " Self-tuning heating (ADA.H) and cooling (ADA.C) error status"
3.5.4 Acknowledgement of failed self-tuning
When pressing the Ù key, the controller switches over to correcting variable dis-
play (
Y ....). After pressing the Ù key again, the controller goes to the error list
of the extended operating level. The error message can be acknowledged by swit-
ching the message to 0 using the D or the I key.
After acknowledging the error message, the controller continues operating in the
automatic mode, using the parameters valid prior to self-tuning start.
Operation
Pro-8
17 Self-tuning
Ada-LED-Status Meaning
blinks Waiting until process is at rest
lit seft tuning running
off self tuning not active e.g. ready
Self-tuning status display
125
126
SP.x run
Ada
Err