Siemens Acvatix SAS31.03 User Manual

30 / 50
Siemens Actuators SAS.., SAT.. for valves CE1P4041en
Building Technologies Functions and control 2015-05-19
4.2.6 Detection of foreign bodies
The actuator detects when the valve is clogged and adjusts its operational behavior
accordingly to prevent damage to itself or the valve.
If the actuator hits an obstacle within the calibrated stroke and is not able to
overcome it with its nominal positioning force, it stores the position at which the
obstacle was hit. Depending on the direction of travel, as …
"Upper limit of valve clogging", if the clogging was detected when
traveling in the direction of "Actuator’s stem extending".
Now, the status LED blinks red and the actuator only follows the positioning signal
between the positions "Actuator’s stem retracted" and "Lower limit of valve
clogging".
After detection of clogging, 3 attempts are made to overcome clogging by traveling
about 15% in the opposite direction and then trying again to overcome the position
of clogging. If the attempts made are unsuccessful, the actuator continues to follow
the positioning signal within the restricted range only and the LED continues to
blink red (see "Status indication " page 34).
4.2.7 Forced control Z
Forced control uses the following operating modes:
Z mode
No function Fully open Fully closed
Overriding
positioning signal “Y“
by 0…1000 Ω
ConnectionsTransmission
Equal-percentage or
linear characteristic
Equal-percentage or
linear characteristic
Contact “Z“ not
connected,
valve follows
positioning signal ”Y”
Contact “Z“ is
connected directly to
“G“,
positiong signal ”Y”
has no impact
Contact “Z“ is
connected directly to
“G0“,
positiong signal ”Y” has
no impact
Contact “Z“ is
connected to “M“ via
resistor “R“,
starting point at 50 Ω,
end point at 900 Ω,
positioning signal ”Y”
has no impact

Siemens Acvatix SAS31.03 Specifications

General

Brand	Siemens
Model	Acvatix SAS31.03
Category	Controller
Language	English