Logix
®
420 Digital Positioner FCD LGENIM0106-07-AQ – 10/15
34
GRGY
STROKE CALIBRATION IN PROGRESS
SETTING INNER LOOP OFFSET
COMMAND INPUT CALIBRATION IN PROGRESS
Description: A calibration sequence is in progress. The inner loop offset
is an important step of the stroke calibration.
Possible Solutions: The calibration can be canceled from the corre-
sponding calibration page of the DTM, from the handheld, or by briefly
pressing the BACK button.
GRRY
JOG COMMAND MODE
Description: The positioner has been placed in a local override mode
where the valve can only be stroked using the UP and DOWN buttons.
The positioner will not respond to analog or digital input commands
from HART.
Possible Solutions: Control the valve using the UP and DOWN buttons.
This mode may be cancelled by briefly pushing the QUICK-CAL/ACCEPT
button.
GRRR
JOG CALIBRATION SET 100% POSITION
Description: During a jog calibration, the unit is waiting for the user to
manually adjust the valve position to the desired 100% open position.
Possible Solutions: Use the Up and Down buttons on the positioner
to adjust the valve to the desired fully open position. The QUICK-CAL/
ACCEPT button to accept.
YGGG
POSITION HIGH LIMIT ALERT
POSITION LOW LIMIT ALERT
Description: The position has reached or is exceeding a user defined
position limit. This is similar to a limit switch indicator.
Possible Solutions: Set the limit to a higher (or lower) value if more
travel is needed, or adjust the command signal back in the specified
range.
YGGY
PILOT RELAY CYCLES WARNING
PILOT RELAY TRAVEL WARNING
VALVE CYCLES WARNING
VALVE TRAVEL WARNING
Description: The cycle or travel limit of the valve, actuator, bellows or
pilot relay has been exceeded. Each cycle represents two reversals of
the direction of valve movement. The cycle counting criterion and count
limit (for the valve, actuator and bellows) are set by the user to track the
usage of the valve assembly.
Possible Solutions: Follow routine procedures for maintenance when
the limit is reached. For example valve inspection may include checking
the packing tightness, and checking linkages for wear, misalignment,
and tightness. Bellows inspection may include checking bellows for
cracking or leaking. Actuator inspection may include checking the
actuator seals and lubrication. Relay inspection may include checking
for high air consumption and signs of wear on the spool. After mainte-
nance, reset the travel accumulator.
YGRR
PARTIAL STROKE TEST FAILED WARNING
Description: Measured times or forces during the last partial stroke test
did not pass the criteria set by the user. This may be an indication of
corrosion build-up on the valve stem or in the actuator, low or restricted
supply pressure, or a sticking positioner relay.
Possible Solutions: This warning will clear upon completion of a
successful partial stroke test.
YYGG
TEMPERATURE HIGH WARNING
TEMPERATURE LOW WARNING
Description: The temperature of the internal electronics has exceeded
the manufacturer set limits of -40°C (-40°F) to 85°C (176°F). Low
temperature may inhibit responsiveness and accuracy. High tempera-
ture may affect performance or limit the life of the positioner.
Possible Solutions: Regulate the temperature of the positioner by
shading or cooling supply gas. Heat the positioner if needed. If the
temperature reading is in error, replace the main board.
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