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5921
S e t t i n g m u l t i s t a g e f u e l / a i r r a t i o c o n t r o l
« F o l l o w e d »
The startup is made similar to modulating operation, including automatic entry of the ig-
nition positions in the operating positions «Stage 1», if these still display invalid values
(showing: XXX.X as a value).
P
o
i
n
t
:
B
S
1
O
2
4
.
3
For the fine adjustment of that point, confirm by pressing Enter .
P
o
i
n
t
:
B
S
1
O
2
4
.
3
This causes output stage 1 to be approached. Here, the actuator to be adjusted can be
selected. Again, confirm by pressing Enter .
P
o
i
n
t
:
B
S
1
O
2
4
.
3
Now, the value can be changed and the respective actuator follows at the rate of the
set ramp speed.
Enter saves the value and Esc discards it.
In this way, all stages can be set, one after the other.
The following table shows the response of the system when a point is selected. How-
ever, the relevant valve is switched on only when at least the switching on point is defi-
nitely used ( XXXX).
Selected point
Operating point stage 1
Switch-on point stage 1
Switch-off point stage 2
Operating point stage 2
Switch-on point stage 3
Switch-off point stage 3
Operating point stage 3
System response when a point is selected
26
I
A
i
r
I
A
u
x
1
I
I
I
A
i
r
I
A
u
x
1
I
I
I
A
i
r
I
A
u
x
1
I
I
Response
Approach of stage 1
Approach of stage 1
--
Approach of stage 2
Approach of stage 2
--
Approach of stage 3
:
2
8
.
5
:
2
8
.
4
:
:
:
2
8
.
5
:
2
8
.
4
:
:
:
2
8
.
5
:
2
8
.
4
:
:
Remark
Fine adjustment of stage 1
Setting from stage 1 off
Setting from both stage 1 and
stage 2 off
Fine adjustment of stage 2
Setting from stage 2 off
Setting from both stage 2 and
stage 3 off
Fine adjustment of stage 3
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