FMS Commissioning
O regulation
2
Regulation strategy
The regulation strategies employed were specially developed and optimised
for the circumstances prevailing in combustion facilities:
- Frequent output changes,
- long lag times.
During burner start-up, the O regulator remains on standby until it is
2
ensured that plausible O measured values are being displayed.
2
Factory setting 90 seconds after ignition -
this is adjustable via parameter 904.
The "Neutral value” is output during standby.
It is calculated automatically from the range set.
Ignition takes place with the neutral value.
The neutral value depends on the selected correction mode;
e.g. at -50% to +50%, the output correction value (neutral value) is
500, whilst at -30% to +70% it is 300.
Note:
The neutral value corresponds to the basic setting of the
VMS/FMS without regulation.
In the case of fuel/curve switching during operation, the neutral value is
output during the switch-over. An air advance can be set to the neutral value
by means of parameters 702 to 704.
O regulation is reactivated, with a time delay, once the switch-over is
2
completed.
Factory setting 30 seconds, adjustable via parameter 903.
Various regulation strategies are available.
In the event of a fault, "O regulation base value deactivated” or "Base value
2
for air shortage” is output, depending on the cause.
i
Burner output
(load)
C
o
rr
e
c
ti
o
n
A
ir
e
xc
e
s
s
Calculated correction value
for falling load
Neutral
correction
99.9
0
min
max
Calculated correction value
for rising load
Base value for air shortage
Base value without regulation
51
