3
Description
3.1
Functional description
3.1.1
Operation Principle
The positioner T.VIS A-15 works with an integrated microprocessor, which
contains the software for the operation, visualization and intelligent position
detection. The valve stroke is detected by a contactless position measuring
system integrated in the positioner, and the information is supplied to the
microprocessor.
During automatic initialization and end position programming, the positioner
learns the stroke of the valve used completely autonomously. This procedure can
be activated either by operating the button in/under the cap or by an external
control signal (programming input).
After completion of the programming procedure, the positioner T.VIS P-15 is in
operating mode.
Here, when the customer feeds an analogue signal (4-20 mA), the positioner can
receive a nominal value default which is processed in the microprocessor and
which by means of appropriate pilot valve activations leads to the desired stroke
of the process valve.
The position regulated in this way is made available for further external treatment
by the positioner as an analogue signal (4-20 mA). Additionally, the position
feedback signals for START/END and an error signal can be made available to
the user as a 24 V DC switching output. The status of the process valve is locally
displayed to be visible from a distance by coloured LEDs under the dome light.
In manual mode, the main actuator can be controlled using the buttons in the cap
in order to move the process valve to its end positions or by operating the
solenoid valves manually. To do this, use a screwdriver to turn the screw (S) from
0 to 1, see graphic.
Fig.3
To assemble or disassemble the valve insert, the main actuator can be controlled
in service mode using the buttons in the cap in order to relieve the spring tension,
which depends on the valve type.
Description
Functional description
430BAL010747EN_3
24.07.2020
15
Summary of Contents for T.VIS P-15
Page 65: ...Appendix 430BAL010747EN_3 24 07 2020 65 ...
Page 66: ......