GOSSEN-METRAWATT GMBH 31
Self-optimizing
Procedure
– The actual set point at the start remains valid; it can no longer be changed (slave controller: a changing external set point is only displayed)
– Activation/deactivation of the second set point does not
become effective
– Set set point ramps are not considered
– Overshooting cannot be avoided when starting in the working point (actual value corresponds nearly to set point)a
Stop
– Optimizing can be stopped at any time with (
→ automatic mode) and/or by switching over to manual / Off with
– Should an error occur while optimizing, the controller no longer issues a positioning signal. Optimizing must be stopped.
More information about error messages on request.
Self-optimizing is enabled when supplied (default setting K0). Disabling via DIP switch:
Self-optimizing serves to determine optimum control dynamics that is, the parameters Pb I, Pb II, tu and tc are
determined.
Getting started
– Complete configuration must be made before
self-optimizing is started
– The set point must be set to the value required after
optimizing.
Start
– Self-optimizing is started when both keys on the operating level (automatic or manual/Off mode) are briefly
pressed simultaneously. It cannot be started with the controller types "Positioner" or "Limit monitor"
– tun1...tun8 is flashingly shown on all operating levels during the optimizing run
– When optimizing is successfully ended, the controller enters automatic mode.
– With a three-state controller (controller type = 4 and 5), cooling is activated when the high limit responds in order to prevent overheating.
Self-optimizing then performs an oscillation test around the set point.
I
II
A1
W2
Actual
I
II
A1
W2
Actual
Actual
Start
Stop
Slow flashing
or
A2
A2
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