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Function
analogue
Operating mode 23
3 .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) inter-
mittent 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 purging
a furnace or kiln, for instance.
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.
IC 40 · Edition 07.18
t
1
high
{
low
closed
DI 1
DI 2
t
2
Depending on the adjustment angle for the "open" po-
sition, 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.
DI 1
Off
On
Off
On
Possible parameter set for this operating mode:
P68028, see page 45 (Parameter sets).
t [s]
t [s]
DI 2
Position
Off
low/closed
Off
high
analogue
On
On
high (DI 1 has priority)
35
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