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Parameters
Fault
In the event of a fault, there will be no signal at ter-
minals 53 and 55 so that the actuator moves to the
closed position. When approaching the closed posi-
tion, no timeout of 255 s is active since no feedback
input is checked. This may result in a situation where
the program is continued in the case of a request for
the closed position, without the butterfly valve being
closed. The outputs at terminals 56 (controller enable)
and 54 (closed position) on the BCU are non-functional
and are not activated.
Manual mode
In Manual mode, no external controller is enabled. The
actuator can be moved to the positions for maximum
capacity or ignition capacity by the user. 3-point step
operation is not possible. No timeout is active when ap-
proaching these positions.
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BCU 580 · Edition 11.15l
80
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