Burkert Type 8681 - Manual (Page 70)

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Position Measuring System
- Then position S2 is taught.
- After that, valve V1 is deactivated. It initiates closing of the process valve.
- Once the process valve is closed (after 15 s maximum), position S1 is displayed by LED.
4. Autotune sequence 1 is complete: positions S1 and S2 have been taught.
In the event that a timeout occurs, the corresponding Autotune function will be exited and switched to
normal operation.
Furthermore, the Teach-In positions will be set to "not taught", i.e. they will blink in the fault color.
autotune 2:
control effect on the process valve internal program error
t2 + t3 autotune mode starts
t2 Autotune 2 starts
Open position Teach T2
Valve closing Activate V1
Wait period 10s
Closed position Teach T1
Valve opens Deactivate V1
Valve opens Wait on position S2 S2 Timeout 15s
autotune mode completed
autotune 3:
control effect on the process valve internal program error
t2 + t3 autotune mode starts
t3 Autotune 3 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
Open clock valve plate Activate V2
Wait period 10s
Clock valve plate Teach T3
Valve closing Deactivate V2
Valve closes Wait on position S1 S1 Timeout 15s
autotune mode completed
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Control Head Type 8681