Calibration - Siemens Acvatix SAX Series Basic Documentation

Note
42 / 60
Siemens
Building Technologies
Direct acting
Reverse acting
Y, Z Positioning signal
H Stroke
U Position feedback
Acting direction: direct
Acting direction: reverse
4.7

Calibration

To match the actuator to production-related mechanical tolerances of the individual
valves, accurate positioning and position feedback must be ensured, if calibration
is performed when the plant is commissioned (page 31). During commissioning,
the actuator detects the valve's end positions and files the exact stroke in its
internal memory.
Calibration takes place in the following phases:
• Actuator drives to H
0
of upper end position.
• Actuator drives to H
100
Detection of lower end position.
• The detected values are stored (3). Then the
actuator follows the positioning signal.
• Observe status indication (LED) during and after calibration (page 47).
• If the actuator does not detect the second end position within an appropriate
stroke range (max. 25 mm), the first end stop will be adopted and the actuator
operates with a working range of 20 mm.
Actuators SAX.., SAL.. for valves
Functions and control
Actuator
Positioning signal Y, Z
(1), valve closes. Detection
(2), valve opens.
Actuator
Position feedback U
CE1P4040en
22.12.2010