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IC 40 function > Analogue operating modes 21 – 27
4.6.3 2-point operation with input-dependent adjustment
angle for the “open” position
Operating mode 23
The function corresponds to operating mode 22 apart
from the fact that both digital inputs function as pulse
inputs.
The actuator operates in high/low (high/closed)
intermittent mode via digital input DI 1.
The actuator operates in analogue/low
(analogue/closed) intermittent mode via digital input DI
2.A signal at DI 1 (priority) always leads to approaching
“high” position. This application can be used, for
instance, for purging a furnace or kiln.
The adjustment angle for the “open” position which can
be varied via the analogue signal is set in BCSoft®.
Example: 4 mA for 60% opening and 20 mA for 100%
opening.
Depending on the adjustment angle for the “open”
position, the heat output can be reduced and a uniform
temperature distribution in the furnace or kiln can be
achieved nevertheless owing to intermittent operation of
the burner.
The “high” position may also be lower than the
“analogue” position in this case.
Possible parameter set for this operating mode:
P 68028, see page 54 (Parameter sets).
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