Calibration - Siemens Acvatix SAX Series Basic Documentation

Note
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the positioning signal within the restricted range only and the actuator LED
continues to blink green (refer to "Indicators" on page 74).
As long as the external setpoint is greater than the position of the high limit valve
clogging, the deviation between the setpoint and position feedback in register 769
is displayed with the warning "Mechanical error, device blocked, manual
intervention or calibration." The cable adapter LED is red. The warning is reset if
the external setpoint drops below the high limit valve clogging, since the setpoint
and stroke position are once again the same. The cable adapter LED switches to
green blinking (=communication).

4.13.3 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 46). 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.
· 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.
The internal position feedback is set to 0% during calibration. For a setpoint >0%,
the actuator detects calibration based on the deviation between setpoint and stroke
position and reports this in Register 769 with the warning "Mechanical error, device
blocked, manual intervention or calibration". The actuator LED blinks green, the
cable adapter LED is red.
After calibration is completed, the actuator follows the external setpoint, the
warning is reset, the actuator LED changes to continuous green and the cable
adapter LED blinks green (communication active).
Observe status indication (actuator LED) during and after calibration (page 74).
The calibration cannot be started via the bus.
Actuators SAX.., SAY.., SAV.., SAL.. for valves
Functions and control
(1), valve closes. Detection
(2), valve opens.
CE1P4040en
2018-12-05