Flowserve 420 IOM - Manual (Page 36)

User Instructions - Logix® 420 Series Digital Positioners FCD LGENIM0106-06 12/13
flowserve.com
36
RGGR
● ●● ●
INNER LOOP OFFSET TIME OUT
Description: During calibration the Inner Loop Offset (ILO)
value did not settle. This could result in less accurate
positioning.
Possible Solutions: Repeat the stroke calibration to get a
more accurate ILO value. To proceed using the less accurate
ILO value, this error may be cleared by briefly pushing the
QUICK-CAL/ACCEPT button. Lowering the setting on the
gain selection switch may help if the actuator is unstable
during the calibration.
RGYG
● ● ● ●
SETTLE TIME OUT
Description: During calibration, the position feedback sensor
showed movement, but did not settle.
Possible Solutions: Check for loose linkages or a loose
positioner sensor. This error may appear on some very small
actuators during the initial calibration. Recalibrating may
clear the problem, or this error may be cleared by briefly
pushing the QUICK-CAL/ACCEPT button.
RGYY
● ● ●●
NO MOTION TIME OUT
Description: During a stroke calibration, there was no valve
motion detected. Because some valves are quite large, this
indicator can take up to 9 minutes to detect an error.
Possible Solutions: Check linkages and air supply to make
sure the system is properly connected. If the time out
occurred because the actuator is very large then simply retry
the QUICK-CAL and the positioner will automatically adjust
for a larger actuator by doubling the time allowed for
movement. This error may be cleared by briefly pushing the
QUICK-CAL/ACCEPT.
RGRG
● ● ● ●
STROKE CALIBRATION REQUIRED
Description: A factory reset was performed and the positioner
has not yet been calibrated. The unit will not respond to
commands and will remain in the failsafe position until a
calibration is successfully completed.
Possible Solutions: Perform a Stroke Calibration (QUICK-
CAL) by holding the QUICK-CAL/ACCEPT button down for 3
seconds, or perform a Pressure or Friction calibration if
desired. See the Calibration section of the IOM for warnings.
RGRY
● ● ● ●
STROKE SHIFT
Description: The 0% and 100% valve positions have both
shifted in the same direction since the last stroke calibration.
This may be related to a bent or adjusted feedback linkage,
loose positioner mounting, or an over rotated feedback
potentiometer.
STROKE SPAN DECREASE
Description: The 0% and 100% valve positions are closer
together compared to the last stroke calibration. This could
indicate debris or build up at valve seat.
STROKE SPAN INCREASE
Description: The 0% and 100% valve positions are farther
apart compared to the last stroke calibration. This could
indicate seat wear.
Possible Solutions: Ensure the feedback linkage is not bent
and the positioner is mounted securely. If the feedback
potentiometer is over-rotated, repeat the stroke calibration
until the Stroke Shift error is no longer present. Inspect valve
or schedule valve for inspection. This notification can be
cleared by briefly pressing the QUICK-CAL/ACCEPT button.