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IC 40 function > Analogue operating modes 21 – 27
>2-point operation with characteristic curve switchover I
The burner continues to be operated in intermittent
mode so as to ensure a uniform temperature distribution
even with low heat output.
The opening speed is pre-set via the time t1 for the entire
“low” to “high” actuating travel.
Accordingly, the closing speed is set with t2 for the entire
“high” to “low” actuating travel.
The speeds are retained in both intermittent modes.
The “high” position can be selected correspondingly
lower in order to obtain longer running times (> 25.5 s).
The “high” position does not limit the adjustment angle
for the “open” position but only defines the speeds. The
adjustment angles for the “open” position are pre-set by
the current signal.
Consequently, “high” position may also be lower than
the “analogue chart” positions. If no analogue value is
pre-set, the actuator remains in “low” position (“closed”
position).Possible parameter set for this operating mode:
P 68030, see page 54 (Parameter sets).
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