West Control Solutions KS 40-1 Burner - Manual (Page 11)

Self-tuning cancellation by the controller:
If the Err LED starts blinking while 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 switches off its outputs (controller output 0%).
Acknowledgement procedures in case of unsuccessful self-tuning:
1. Press keys
Ù and È simultaneously:
The controller continues controlling using the old parameters in automatic
mode. The Err LED continues blinking, until the self-tuning error was
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 9: "Error status self-tuning heating ( ADA.H) and cooling ( ADA.C)"
Examples for self-tuning attempt 3-point-stepping controller
After the start (1) the controller
closes the actuator (2
Out.3).
When the difference between
process value and set-point is
big enough (3), the changing of
the process value is monitored
for 1 min. (4). Afterwards the
actuator is opened (5
Out.1).
If the reversal point is reached
(6) or there are made enough
measurements, the parameters
are detected and are adopted.
3.4 Manual tuning
The optimization aid should be used with units on which the control parameters
shall be set without self-tuning.
For this, the response of process variable x after a step change of correcting va-
riable y can be used. Frequently, plotting the complete response curve (0 to
100%) is not possible, because the process must be kept within defined limits.
Operation
Manual tuning 11 KS40-1 burner
W
X
1 min
t
t
1 2 3 4 5 6