Interpreting the display The display when "Load” is selected
The display in manual operation
Setting the output regulator The output regulator is only adjusted via the parameters.
Control region The regulator's set-point lies below the value "Upper control region”
"Burner on” value (parameter 802).
The content of the parameter "Switch-on point” is subtracted from the set-
point, giving the switch-on value. The value of the "Upper control region”
(parameter 803) is added to the set-point and forms the control region's
upper limit. Thus, the control region can lie asymmetrically around the set-
point. The switch-on point can also be above the set-point; a negative
value (<0) needs then to be input.
The rundown region is limited from above by the parameter "Burner off”
(parameter 804). The parameter is added to the set-point. If this value is
exceeded, the burner is shut down (either internally via the controller in
FMS mode, or via a relay output in VMS mode).
The region between the "Upper control region” and the "Shutdown limit” is
the rundown region. If the actual value reaches this region, the compound
returns to base load.
It also follows from the above that in general, the value in "Burner off” is
greater than the one in "Upper control region”. Otherwise there is no
rundown region, and the burner is shut down directly when reaching the
limit.
Output regulator Setting the regulator
35
Set-point Actual value Load specification Internal load
Load Internal load Actual value
specification
(via Channel 1 key)
H AH A
Shutdown limit
Upper control region
Set-point
(Parameter 796-799)
Switch-on point
Rundown region
(Parameter 804)
(Parameter 803)
(Parameter 802)
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