23
1.xx
1
COdE
1.xx
OFF
AtNE
1..xx
xxxx
xxxx
xxxx
xxxx
2.8.3 Auto-tune
Accessing the Auto-tune Facility
From any operating frame, press and hold the key until the
'COdE' frame is displayed.
Set the correct auto-tune password.
Auto-tune Enable
Select the type of auto-tune required.
Single Loop Templates
OFF – Off
A – Type A
b – Type B
Auto-tune is started automatically when the key is pressed.
Auto-tune can be stopped at any time by pressing the key.
Note. P + I control only – set the derivative term to 'OFF'
in the Tuning Level – see Section 3.2.
Return to the Operating Level.
2 OPERATOR LEVEL…
Set Point
PV
1
4
=
Type A –
1
/
4
wave damping
Type B – Minimum Overshoot
Set Point
PV
x
1
x
2
x
1
x
2
Fig. 2.8 Autotune Types