Metso NELES NDX 511 Series, Installation Maintenance And Operating Instructions

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NDX VALVE CONTROLLER
Operating Condition Diagnostics
Status Related events in
the event log
Status description Proposed actions Default NAMUR
classification
Control Ratio Limit
Exceeded
Control Ratio Limit Exceeded
Control ratio back to normal
Valve reversals/Set­
point reversals
Check if process conditions have changed.
Evaluate if limit is correctly set.
Info
Temperature Above
High Limit
Temperature High Limit
Exceeded
High temperature recovered
Positioner has
detected that the
temperature is above
specification limits.
Inspect the positioner and operating
conditions.
Out of
Specification
Temperature Below
Low Limit
Temperature Low Limit
Exceeded
Low temperature recovered
Positioner has
detected that the
temperature is below
specification limits.
Inspect the positioner and operating
conditions.
Out of
Specification
Supply Pressure
Above High Limit
Supply Pressure High Limit
Exceeded
High supply pressure recov­
ered
Positioner diagnostics
have detected that
instrument air pressure
to positioner is above
acceptable limits.
Check supply pressure level. Out of
Specification
Supply Pressure Below
Low Limit
Supply Pressure Low Limit
Exceeded
Low supply pressure recov­
ered
Positioner diagnos­
tics have detected
that instrument air
pressure to positioner
is below acceptable
limits.
Check supply pressure level and supply
pressure capacity.
Out of
Specification
Calibration Recom­
mended
Previous calibration was
cancelled, calibration recom­
mended
Previous calibration
was cancelled.
Run position calibration. Maintenance
Required
Single point calibration is used,
calibration recommended
Single point calibra­
tion is used.
Run position calibration.
Assembly Related parameter
was changed, calibration
recommended
Assembly Related
parameter was
changed.
Run position calibration.
Device is unable to detect mag­
net in whole position range,
calibration recommended
Device is unable to
detect magnet in
whole position range.
Check that magnet is installed according to
User Guide and re­calibrate device.
Factory default parameters
was taken in use, calibration
recommended
Factory default
parameters were
taken in use.
Run position calibration.
Calibration Required ­ Calibration required
prior to use
Device needs to be configured and cali­
brated before it is switched to automatic
control mode. Follow the instructions on
the LUI first screen and proceed to guided
start­up.
Info
Supply Pressure Too
Low for Single­Acting
Actuator
Supply pressure too low for
single acting actuator
Supply pressure too low
for single acting actuator
recovered
Instrument air pres­
sure to positioner is
too low to drive valve
for whole operation
range.
Check supply pressure level and supply
pressure capacity.
Out of
Specification
Cover is open Cover is opened
Cover is closed
Cover is opened Check that cover is not left open by accident. Info
Software Limit Switches
Status Related events in
the event log
Status description Proposed actions Default NAMUR
classification
Limit Switch Closed ­ Limit switch is closed ­ Info
Limit Switch Open ­ Limit switch is opened ­ Info
13 DEVICE TYPE MANAGER (DTM)