Lamtec ETAMATIC, Руководство пользователя

Страница: 30 / 136

29
5 Commissioning
Control Range
Select parameter no. 802 and 803
No FMS ETA Short Text Description Min Max Default
798 0 0 Soll2min Controller set-point 2 minimum 0 999 70
Firing-rate controller set point 2 minimum (set point 2)

in ° C or bar (xx.x)

Enter the minimum value for the second controller set
point (active if input "set point switching" = 1) (control by
atmospheric condition). Enter the setpoint in this param-
eter, if the firing-rate controller is configured to constant
controller,
see P 796
refer to figure "Control by Atmospheric Conditions
/ Setpoint Switching of the Firing-rate Controller"
No FMS ETA Short Text Description Min Max Default
802 0 0 EinschPt Burner start point 999 999 1
Enter the switching point of the firing-rate controller as
the difference to the set point.

[Switching point] = [setpoint] - [parameter content]

e. g. : burner should switch on at 110.

setpoint = 120, parameter content = 10,

110 = 120 - 10

If the burner shall start above the setpoint,

you may enter negative values as well.

Therefore the following values correspond:

-1 = 65535 and -999 = 94537

Parameter content = 65536 - difference

i. e.: burner shall switch on at 125.

set point = 120, parameter content = 65536 - 5 = 65531

switching point value= 120 - (-5) = 125
803 0 0 Regelb.O upper Control range 0 999 10
(difference to the set point 1/2) in ° C or bar (xx.x)

Enter the upper control range limit.

The entered value corresponds to the difference
between the actual setpoint and the upper limit of the
control range.

Depending on the content of Parameter 809, the con-
tent of this parameter is interpreted as ° C (directly with-
out decimal point) as bar (resolution 0.1 bar, i.e. range
from 0.1 to 99.9 bar) or in digit.


see figure "Control range of the Firing-rate Controller"