Instruction Manual

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)