GOSSEN METRAWATT GMBH 21
Self-Tuning
Sequence
– The setpoint which is active when tuning is started remains valid and can no longer be changed.
– Activation or deactivation of setpoint 2 does not
become effective.
– Selected setpoint ramps are not taken into consideration.
– If started at the operating point (actual value approximates the setpoint value), overshooting cannot be
avoided.
Abort
– Self-tuning can be aborted at any time with the keys (→ automatic operating mode), or by
switching to manual / off with the key.
– If an error occurs during self-tuning, the controller no longer reads out an actuating signal. Self-tuning must
be aborted in this case.
Additional information regarding error messages upon request.
Self-tuning is used to achieve optimized controller dynamics, i.e. parameters
Pb 1, Pb 11, tu and tc are determined.
Preparation
– Complete configuration must be performed before
self-tuning is started.
– The setpoint value is adjusted to the value which is required after
self-tuning.
Start
– Briefly press the keys simultaneously at the operating level
(automatic or off operating mode) in order to trigger self-tuning. Self-
tuning cannot be started in the “actuator” or “limit transducer” mode.
– tun1...tun8 blinks at the display at all operating levels during self-tuning.
– The controller is switched to the automatic operating mode after self-tuning has been successfully
completed.
– In the case of 3-step controllers (controller sorts 4 and 5), cooling is activated if the upper limit value is
exceeded in order to prevent overheating. Self-tuning then performs an oscillation test around the
setpoint.
Start
Abort
Slow Blinking
or
I
II
A1
A2
W2
Current
I
II
A1
A2
W2
Current
Current
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