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Function
high
middle
low
closed
DI 1
DI 2
Operating mode 8
3 .5 .8 2-point operation with input-dependent
adjustment angle for the "open" position
Operating mode 8
The function corresponds to operating mode 7 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 and operates in mid-
dle/low (middle/closed) mode via DI 2.
A signal at DI 1 (priority) always leads to approaching
"high" position which can be used to purge the furnace
or kiln, for instance.
IC 40 · Edition 07.18
t
t
1
2
DI 1
DI 2
Off
Off
On
Off
Off
On
On
On
Alternative function: 2-stage operation with constant
speed.
For as long as a signal is applied to DI 2, DI 1 switches
to and fro between "high" and "middle" position.
This mode of operation ensures that the actuator al-
ways opens or closes at constant speed.
Possible parameter set for this operating mode:
P68024, see page 45 (Parameter sets).
t [s]
t [s]
Position
low/closed
high
middle
high (DI 1 has priority)
25
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