GOSSEN-METRAWATT GMBH 25
Controller types
See page 28 for Parameters
Code Controller Type Remarks
Limit monitor
Switching output I is active, if act. value < actual set point, switching output II is active, if actual value > actual
set point + dbnd. The switching hysteresis is HYST. A change of the switching state can be made every tc.
Positioner Output of a constant positioning signal to switching output I, if YST > 0, to switching output II, if YST<0.
The positioning cycle is tc. No alarm functions.
2-state controller „Heat“
A PDPI control algorithm without overshoot controls the switching output I in order to increment / decrement the
actual value. The positioning cycle is at least tc.
2-state controller „Cool“
Three-state controller
A PDPI control algorithm without overshoot controls the switching output I in order to increment the actual
value and/or the switching output II to decrement the actual value. The positioning cycle is at least tc.
The deadband dbnd suppresses a change between "Heat" and "Cool", without offset.
Three-state controller
Water cooling
The regulation ratio of the switching output II is matched to the non-linear behavior of a water cooler.
The positioning cycle is tc.
Step controller
A PDPI control algorithm without overshoot controls the switching output I and/or II in order to increment/decre-
ment the actual value. The positioning pulse width is tc. The deadband dbnd is symmetric to the set point.
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