Pilz PNOZ m1p base unit - Manual (Page 43)

4.3 Configuration in the PNOZmulti Configurator
4 Burners
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4.3.2.3 Flame monitoring
Flame monitoring 4- Funktionsbeschreibung_Ueberwachungen_Flammenueberwachung
Flame monitoring is used to establish and signal the presence of a flame.
To ensure that the signal is actually a result of the flame and not of some
external light source, the absence of the flame is monitored during a
burner cycle (e.g. during pre-purge). With direct ignition, the main flame
is monitored.
With indirect ignition you can select between two types of flame moni-
toring:
 Joint flame monitoring
Ignition flame and main flame are monitored jointly. The FLAM input
for the main flame must be logically linked to flame monitoring. The
FLAI input for the ignition flame will not then be evaluated.
 Separate flame monitoring
Ignition flame and main flame are monitored separately; each have
their own flame monitoring device.
4.3.2.4 Compound controller
Compound controller 4- Funktionsbeschreibung_Ueberwachungen_Verbundregelung
If master burners have an external electronic compound controller, the
compound controller must be activated and monitored via the burner el-
ement
The compound controller controls and monitors the fuel/air ratio. The
regulating devices for the amount of combustion air and fuel are activat-
ed for this purpose.
 The "PURG" output is activated during the step: "Compound control-
ler to pre-purge position". This output signal is intended to switch the
compound controller to the pre-purge position (maximum amount of
combustion air).
 During the steps "Pre-purge ...", a signal is expected at the "PUR" in-
put from the compound controller, indicating that the compound con-
troller is in "pre-purge" position. This signal must not occur until the
airflow rate required for pre-purge is present.
 The "IGNI" output is activated during the step: "Compound controller
to ignition position". This output signal is intended to switch the com-
pound controller to the ignition position (optimum fuel/air ratio for ig-
nition).
 During the steps "Ignition ...", a signal is expected at the "IGN" input
from the compound controller, indicating that the compound control-
ler is in "ignition" position. This signal must not occur until the opti-
mum fuel/air ratio for ignition is present.