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.
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