Autotune Functions; Autotune Sequence - Burkert 8681 Operating Instructions Manual

16.2.2. Autotune functions

Teach Mode
button
Autotune
T2 + T3
mode
The Autotune function can be selected after changing to Autotune mode. If an Autotune function has not been
started 10 seconds after the change to Autotune mode, that mode will be exited.
If an Autotune function does not run properly or is aborted (if e.g. no compressed air is connected), the positions
already taught are deleted again, the corresponding Autotune function is left and switched to normal operation.
The Teach positions are set to "not taught", i.e. they flash in the fault color.
In the case of the design for double-acting actuators (solenoid valves NC+NO) only Autotune functions 1
and 2 are possible (compare Chapter "15.1" on page 73).

16.2.3. Autotune sequence

Autotune 1:
Control
T2 + T3
T1
Example illustration of the Autotune procedure 1:
1. Check in what position the process valve must be at the beginning of the Autotune procedure (here:
closed position). Close it if necessary!
2. Press the teach buttons T2 and T3 at the same time (for 2.5 s) to select the Autotune mode.
This mode will be indicated by continuous illumination of all 6 LEDs.
3. Press teach button T1 (for 0.5 s) to start the Autotune 1 mode. This will be indicated by
illumination of all 6 LEDs in "chaser mode". The programmed sequence for "Auto-Teach
sequence" 1 will now run fully automatically:
78
Activa- Opt. feed-
tion dura- back
tion
green +
yellow +
red
2.5s
Continu-
ously
ON
Effect on the process valve
Autotune mode started
Autotune 1 starts
Closed position
Open valve
Open position
Valve closing
Valve closes
Autotune mode completed
English
Teach Function
button
T1 Autotune 1
T2 Autotune 2
T3 Autotune 3
+
T1 + T2 Autotune 4
T1 + T3 Autotune 5
T2 + T3 Autotune 6
Internal program
Teach
Activate
Wait period
Teach
Deactivate
Wait on position S1
Control Head Type 8681
PositionMeasuringSystem
Activation Opt. feed-
duration back
green +
yellow +
0.5s
red
chaser mode
Error
T1
V1
10s
T2
V1
S1 Timeout 15s