Flowserve Logix 520MD+ DD - Manual (Page 8)

DD User Manual - Logix® 520MD+ Series Digital Positioner FCD-LGENSF0013-01
© Flowserve Corporation
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View the minimum temperature the positioner has seen since
the last factory reset was performed.
3.5.6 Max Power Up Temperature
View the maximum temperature the positioner has seen
since the last time the positioner was powered up.
3.5.7 Min Power Up Temperature
View the minimum temperature the positioner has seen since
the last time the positioner was powered up.
3.5.8 Humidity Percent
View the current relative humidity inside the positioner.
3.6 Health Data
View the warning level for each category. The 520MD+
positioner monitors the conditions that affect the ability of the
valve to respond. As these conditions worsen, a warning
level is shown. A low value such as 0% indicates no
warning. A high value such as 90% indicates the ability to
control may be impaired soon. A value of 100 indicates that
the valve may no longer be responsive.
3.6.1 Valve Health % Warning
The warning value from 0 to 100% based on warnings and
alarms related to valve health such as friction. A lower value
indicates less serious issues.
3.6.2 Actuator Health % Warning
The warning value from 0 to 100% based on warnings and
alarms related to actuator health such as supply pressure. A
lower value indicates less serious issues.
3.6.3 Positioner Health % Warning
The warning value from 0 to 100% based on warnings and
alarms related to positioner health such as circuit board
malfunction. A lower value indicates less serious issues.
3.6.4 Control Health % Warning
The warning value from 0 to 100% based on warnings and
alarms related to control health such as deviation. A lower
value indicates less serious issues.
3.7 Diagnostic Values
View basic diagnostic information. Pro diagnostics are
required.
3.7.1 Friction
View the friction of the valve and actuator assembly.
3.7.2 Actuation Ratio
View the effort required to move the valve in the direction that
compresses the spring. The ratio is the force required to
overcome friction, spring, and process load forces over the
force available from the current supply pressure.
3.7.3 Pneumatic Leak
View the pneumatic leakage of the actuator. This value does
not include normal air consumption.
3.7.4 Valve Travel
View the amount the valve has traveled in percent of total
stroke length.
3.7.5 Valve Cycles
View the number of cycles the valve has travelled. This is
the number of times the valve has changed directions twice.
3.7.6 Piezo Volts
View the voltage supplied to the piezo element in the
positioner's pilot relay. This should typically be between 0
and 24 VDC.