West Control Solutions Pro-16 - Manual (Page 20)

Operation
9499-040-93811 / 59537-1 Page 20 of 88 Pro-16
3.7.7 Self-tuning start
The operator can start self-tuning at any time. For this, keys Ù and È must be pressed
simultaneously. With blinking in the second row the active adaptation is displayed
Ad:PIR. The controller outputs 0%, waits until the process is at rest and starts self-
tuning:
Ad:Stp
The self-tuning attempt is started when the following prerequisite is met:

The difference between process value i set-point must be  10% of the set-point
range ( SP.Hi - SP.LO) (with inverse action: process value smaller than set-
point, with direct action: process value higher than set-point).
After successful self-tuning, the AdA-LED is off and the controller continues operating with
the new control parameters.

Self-tuning cancellation by the operator:
Self-tuning can always be cancelled by the operator. For this, press Ù and È key
simultaneously. The controller continues operating with the old parameters in automatic
mode in the first case and in manual mode in the second case.

Self-tuning cancellation by the controller:
An error detected during self-tuning means that the technical conditions prevent successful
self-tuning.
In this case, self-tuning was cancelled by the controller. The controller switches off its
outputs (controller output 0%), to avoid exceeding the setpoint.
The user has two possibilities to acknowledge a failed adaptation:
1.
Press keys Ù and È simultaneously:
The controller continues controlling using the old parameters in automatic mode. The
self-tuning error must be acknowledged in the error list.
2.
Press key Ù :
Display of error list at extended operating level. After acknowledgement of the error
message, the controller continues control in automatic mode using the old
parameters.
Cancellation causes: r page 13: "Error status"

Acknowledgement of failed self-tuning
When pressing the Ù key, the controller switches over to correcting variable display
( Y ....). After pressing the key again, the controller goes to the error list of the extended
operating level. The error message can be acknowledged by switching the message to 0
using the
Ì - or the È key.
After acknowledging the error message, the controller continues operating in the automatic
mode, using the parameters valid prior to self-tuning start.
3.7.8 Examples for self-tuning attempts
(controller inverse, heating or heating/cooling)