User manual

UR3274U - User manual 15
. Auto-Tune
Tuning procedure calculates the controller parameters and
can be manual or automatic according to selection on para-
meter 46
tune .
. Manual Tuning
Manual procedure allows the user greater exibility to decide
when to update PID algorithm work parameters. The proce-
dure can be activated in two ways.
• RunningTuningbykeyboard:
Press
FNC
key until display 1 shows the writing tune with
display 2 showing
o FF , press , display 2 shows on . The
T
led switches on and the procedure begins.
• RunningTuningbydigitalinput:
Select
tune on parameter 50 d Gt.i .
At rst activation of digital input (commutation on front panel)
T
led switches ON and at second activation switches o.
. Automatic Tuning
Automatic tuning activates whenever the controller is switched
on or when the setpoint is modied to a value over 35%.
To avoid an overshoot, the treshold where the controller calcu-
lates new PID parameters is determined by the setpoint value
minus the “Set Deviation Tune” (see Parameter 47
s.d.tu. ).
To exit Tuning and keep PID values unchanged, just press the
FNC
key until display 1 shows the writing tune with the display
showing
on , press , display 2 shows off .
The
T
led switches o and the procedure nishes.