IC 40 · Edition 07.18
20
t [s]
high
low
closed
DI 1
DI 2
t [s]
t
1
t
2
Function
3 .5 .5 3-point step operation
Operating mode 5
If only digital input DI 1 is active, the actuator opens. If
only digital input DI 2 is active, the actuator closes.
If neither of the digital inputs or both digital inputs are
active simultaneously, the actuator stops in its position.
This means that it can be stopped in any position.
The actuator operates in continuous mode and is con-
trolled via a 3-point step signal. The setting function is
limited by the “low” and “high” positions (“low” position
may also be 0° = “closed” position).
The opening speed is preset via the time t
1
for the entire
“low” to “high” setting travel. Accordingly, the closing
speed is set with t
2
for the entire “high” to “low” setting
travel.
Possible parameter sets for this operating mode:
P68012, P68013, P68014, see page 45 (Parameter
sets).
DI 1
DI 2
Reaction
Off
Off
Idle/Stop
On
Off
Open to “high” position at max.
Off
On
Close to “low” position (“closed” position) at min.
On
On
Idle/Stop
This method of control is frequently used on furnaces
and kilns in the sector of ceramics, steel and aluminium.
Operating mode 5