38
1.xx
1
COdE
1.xx
OFF
AtNE
1..xx
xxxx
xxxx
xxxx
xxxx
2.13.3
Auto-tune
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. 2.13 Autotune Types
…2
OPERATOR LEVEL
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
Cascade Templates
OFF
– Off
SLV.A
– Slave type A
A
– Type A
SLV.b
– Slave type B
b
– Type B
MSt.A
– Master type A
MSt.b
– Master 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. Profile program – If a profile is running,
the auto-tune feature cannot be started. When the
key is pressed, the display reverts to 'OFF'.
Note. Slave control loops only – place the slave
into local set point mode and adjust the set point to the
required value prior to autotuning.
Note. P + I control only – set the derivative term
to 'OFF' in the Tuning Level – see Section 4.2.
Return to the Operating Level.