UNIWORLD Series
M/UNIWORLD-M/E ed. 01 2020
3.11
– “AMS SERIES” PRE-COMMISSIONING CONTROL OPERATIONS
All the internal parameters, such as the motor torque requested, the position, the operating status and other parameters are constantly
monitored during operation of the PSL-AMS actuator, this means the position of the valve is of utmost accuracy and that closure of the
valve is always guaranteed. Changes can be read using the PSCS communication software or using the PSC.2 local control panel
(additional manual), or it can be displayed on the control cabin using the error indication relay optional, to ensure maximum process
safety.
3.11.1
– “AMS SERIES” LIMITATION IN FINAL POSITION
The final limits of the PSL-AMS actuators can be adapted to optimal operation of the valve, using the PSCS communication software
(use a special interface cable or, alternatively, a Bluetooth connection). This will result in various actuator behaviours. If a position is
surpassed or not reachable, this can be read using the error indication relay optional or using the PSCS communication software.
3.11.1.1
– Thrust/Torque limitation
The actuator frees the planned maximum force/torque each time it reaches the final position. If the closure point inside the valve is
modified, for example when the seal gasket is worn, the actuator will move forward based on its actuation range, trying to reach the
planned force/torque.
3.11.1.2
– Automatic positioning limitation
In normal operation, the actuator stops in the position it was in as the mechanical stop of the valve or the actuator, during automatic
commissioning. If the closure point of the valve changes, the actuator CANNOT follow this variation, but always stops in the initially
found point.
3.11.1.3
– Stroke limitation
In normal operation, the actuator stops in the point defined via manual stoppage. This position does not depend on any mechanical
stop inside the valve or the actuator.
3.12
– “AMS SERIES” FINAL COMMISSIONING - START-UP
The actuator is delivered
in the “not commissioned” position with a green LED flashing slowly. There will be no reaction to any input
(control signal or opening/closure signal).
Based on the type of configuration of the limitations (see 3.10.1) there are two commissioning modes:
-
Automatic
if at least one limitation (opening or closure) is set to “torque” or “automatic positioning”.
-
Manual
done if both the limitations (in opening or closure) are “by position” or using the PSCS software or using the PSC.2
control panel.
