User Instructions - Logix® 520MD+ Series Digital Positioner
FCD LGENIM0105-00
© Flowserve Corporation
24
Field Trial Version – Printed October 28, 2011
10 POSITIONER FUNCTIONS (LCD
Display)
The optional LCD display provides a variety of useful
information and functions. The Main View shows important
information using icons and scrolling status lines. Using the
directional buttons (
▼▲►◄
) to navigate the menu, the user
can view detailed information perform commonly used
functions.
NOTE: The LCD backlight may change brightness during
use. This is normal. The backlight uses any residual power
not used by other functions of the circuitry. When current
supply is low (4mA) the light will appear darker. When
current supply is high (20mA) the light will appear brighter.
10.1 Main Display View
The main view provides an instant display of important status
parameters: Position, Final Command, Scrolling Status
Message, Current Alarm Status and Status Icons.
10.1.1 Position and Command
The current Position and Command are always shown. This
shows the Final Command which has been adjusted
according to a Characterization Curve, MPC, or Soft Limits
that have been applied and should match the Position.
10.1.2 Scrolling Status Messages
The Scrolling Status Message provides the following
information as applicable:
Date and Time – The date and time format is adjustable.
See Section 10.3.9 Configuration (Set Time and Date) for
more information.
Ambient Temperature – This is the temperature inside the
positioner.
Supply Pressure – The supply pressure is available with
Advanced and Pro upgrades.
Friction – This is calculated when the valve moves. Friction
is available with the Pro upgrade.
Actuation Ratio – This is the amount of available force used
to move the valve.
Pneumatic Leak – This is leak beyond normal air
consumption. Pneumatic Leak is available with the Pro
upgrade.
Training Percent Complete – Training tracks key parameters
for a period of time. This data can be used to set more
meaningful Alarm and Warning limits. Training will begin
automatically after 24 hours of continuous operation and end
after 90 days of positioner operation. Or use the DTM to
initialize this function. The training status will show only if
training has occurred.
Training Hours Remaining - This shows the hours left in the
training session if training is currently in progress.
Auxiliary Card 1 Status - This shows the type of card in
auxiliary card slot 1.
Auxiliary Card 2 Status - This shows the type of card in
auxiliary card slot 2.
DIP Switch Override – This indicates that the Configuration
(DIP) Switches do not reflect the actual configuration of the
positioner. This can happen if a Configuration Switch is
changed after a Quick-Cal, or if the configuration is was
changed from the DTM. Performing a Quick-Cal will reset
the configuration to what the Configuration Switches show,
which may not be desirable in this case. Ensure the
Configuration Switches are set properly before performing a
Quick-Cal.
10.1.3 Current Alarm Status
The Current Alarm Status area shows the highest priority
alarm, warning, alert or status indication. This matches the
code indicated by the flashing LEDs.
10.1.4 Status Icons
Status icons continuously show the state of the features and
modes.
Table 15: Status Icons
Icon Location
Icon
Icon Meaning
Upgrade Level
Standard
Advanced upgrade
Pro upgrade
Command
Source
Analog command mode
Digital command mode
Out of service
Training Mode
Training in progress
Training complete
(blank)
Training not started
Pressure
Control
Pressure control locked
(blank)
Pressure control not locked
HART
Communicatio
ns
HART communication currently in
progress
Burst mode in progress
(blank)
No HART communication currently
in progress
Continuous
Stroke Test
(CST)
CST ramping up
CST ramping down
(blank)
CST holding steady
CST not activated
Upgrade Level Icons - The upgrade levels provide increased
functionality beginning at Standard, then Advanced and
finally Pro. These levels also correspond to the model
numbers 520MD+, 521MD+ and 522MD+ respectively. A
Standard (520MD+) positioner has no upgrades. An
Advanced (521MD+) positioner includes pressure sensor
functions. A Pro (522MD+) positioner includes the pressure
sensor functions along with full diagnostic capabilities.
Command Source Icons – The positioner is in Analog
Command mode if it is using the 4-20 mA signal to control
the location of the valve. In Digital Command mode, the
positioner ignores the 4-20 command and responds to the
position command given through HART. In Out Of Service
mode, the positioner is performing a calibration, signature,
partial stroke test or is in a factory reset state.
Training Mode Icons – The positioner can keep track of
several key data parameters for a period of time specified by
the user. This data can be viewed while setting alarm limits
to make them more meaningful. For example, if supply
pressure cycles every day from 5 bar to 4 bar in normal
operation, this information will be displayed where the supply
pressure warning limits are set. Seeing that the supply
typically drops to 4 bar, the user can then set the supply
pressure low warning to a value below 4 bar. See the DTM
User Manual for more information.
Summary of Contents for Logix 520MD+
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