Metso neles ND9000P, User Manual

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sition 99% to closed direction.
‰
Stroking range c2o close; The pressure difference (in
bars) recorded when the valve starts to move from po-
sition 1% to open direction.
‰
Stroking range c2o open; The pressure difference (in
bars) recorded when the valve starts to move from po-
sition 99% to open direction.
3.2.4.4 Valve Deadband Test
Figure 16 shows Valve Deadband test.
Figure 16. Valve Deadband test.
You can control the Valve Deadband test by entering the
following parameters in Valve Deadband Test view:
ƒ Test Init Time : The time given to valve to reach start-
ing point of the valve deadband test
ƒ Test Time : The time that the test waits between suc-
cessive 0.1% steps. The total test time can not be es-
timated. The absolute maximum is 40*
Test Time . Note
that when the input signal direction changes, the wait
time is 2*
Test Time .
ƒ Start setpoint : Starting valve position for the valve
deadband test
You can start the test by clicking the "Start test" button. The
test can be stopped any time by clicking the "Cancel test"
button.
Once the test has been run, the following test results are
calculated.
ƒ Deadband : The range through which a control valve's
input signal may be varied, upon reversal of direction,
without initiating an observable change in the position
of the closure member.
3.2.5 Reset
Reset Diagnostics allows you to choose the diagnostics
parameters you wish to reset. After you reset the diagnos-
tics, old data is permanently deleted.
• Valve travel counters
•
Actuator travel counters
•
Setpoint travel counters
•
Spool valve travel counters
•
Reset all trends and speed histograms
• Valve travel vs. time histogram
• Event log
•
Reset everything
Factory Reset provides three different reset functions.
•
Factory Reset resets device parameters to default val-
ues. The bus address remains the same.
•
Warmstart of the device. All parametrisation remains
unchanged.
• Reset the bus address to value 126.
3.2.6 Write Protection
HW Write Protection . Indicates the position of a hardware
jumper which protects all acyclic write access to all write-
able parameters of a device.
SW Write Locking . Protects all acyclic write access to all
writeable parameters of a device except this SW Write
Locking one. Selections are On and Off (default).
3.3 View menu
The contents of the view menu is presented in figure 17.
Figure 17. View menu.
3.3.1 Display
The page Measured value is presented in figure 18.
Figure 18. Measured value.
Readback value is the valve position measurement.