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Siemens Actuators SAX.., SAY.., SAV.., SAL.. for valves CE1P4040en
Building Technologies Functions and control 2018-12-05
After synchronization the actuator follows the control signal again.
4.7.1.1 Active forced position input on Z
If after return to automatic mode a signal on Z is active (GND, AC/DC 24 V or
0…1000 Ohm) the ClosedPosition-Synchronisation is deactivated as long as the
signal on Z remains.
After Z is deactivated the ClosedPosition-Synchronisation will be performed.
ClosedPosition-Synchronisation is only automatically activated after manual
operation. A power failure does not activate this function automatically, to avoid that
all actuators in a section close in parallel.
If the customer likes synchronization also after a power failure he should take care
that the plant restarting routine drives the actuator automatically into an end
position. This will also synchronies the internal position control and the real
position.
Note
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