Burkert Type 8681 - Manual (Page 69)

69
Position Measuring System
autotune functions 15.2.2.
teach-in
button
Mode activa-
tion
duration
opt. feed-
back
teach-in
button
Function activation
duration
opt. feed-
back
T2 + T3
Autotune
mode
2.5s
green +
yellow +
red
continuously
on
+
T1 Autotune 1
0.5s
green +
yellow +
red
chaser mode
T2 Autotune 2
T3 Autotune 3
T1 + T2 Autotune 4
T1 + T3 Autotune 5
T2 + T3 Autotune 6
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 is not working properly or is aborted (in case no compressed air is connected, for
example), the already taught positions are deleted again; the corresponding Autotune function is exited
and switched to normal operation.
The teach positions are set to "not taught", i.e. they blink in the fault color.
autotune sequence 15.2.3.
autotune 1:
control effect on the process valve internal program error
t2 + t3 autotune mode starts
t1 Autotune 1 starts
Closed position Teach T1
Valve opens Activate V1
Wait period 10s
Open position Teach T2
Valve closing Deactivate V1
Valve closes Wait on position S1 S1 Timeout 15s
autotune mode completed
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". Only the programmed sequence
for "Auto-Teach sequence" 1 will run fully automatically:
- The position in that the process valve is adjusted will be taught first as position S1.
The position of the process valve must therefore be checked first!
- After that, valve V1 is activated. It initiates opening of the process valve.
- After maximum 10 s, the process valve has reached position S2 (open position).
english
Control Head Type 8681