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IC 40 function > Analogue operating modes 21 – 27
4.6.2 2-point operation with switchover of the
adjustment angle for the “open” position
Operating mode 22
In idle state (DI 1 and DI 2 with no signal), the actuator is
in “low” position independently of the analogue signal
(“low” position may also be 0° = “closed” position).
Signal at DI 1, DI 2 with no signal: The actuator operates
in high/low (high/closed) intermittent mode via digital
input DI 1.Digital input DI 1 functions as a pulse input.
Signal at DI 2:
Intermittent mode can switch in ongoing operation
between high/low (high/closed) and analogue/low
(analogue/closed). The adjustment angle for the
“open” position is then approached with signal at DI 1
and switched over via DI 2.
The actuator now operates in analogue/low
(analogue/closed) intermittent mode via digital input DI
1.The adjustment angle for the “open” position which
can be varied via the analogue signal (position setpoint)
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.
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