Flowserve 500+ Series Logix - Manual (Page 56)

User Instructions - Logix® 500+ Series Digital Positioners FCD LGENIM0105-10 11/13
flowserve.com 56
Possible Solutions: Check for loose linkages. Adjust the
positioner mounting. Adjust the feedback pin back into range.
Adjust the feedback pin to a position closer to the follower
arm pivot to create a larger angle of rotation and recalibrate.
The minimum angle of rotation should be greater than 15
degrees. Briefly pressing the QUICK-CAL/ACCEPT button
acknowledges a small range and the positioner will operate
using the short stroke calibration if otherwise a good
calibration.
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.
RGYR
● ● ● ●
ANALOG OUTPUT RANGE TOO SMALL
Description: During an Analog Output Calibration the
difference between the milliamp signal at 0% and the
milliamp signal at 100% was too small.
Possible Solutions: Recalibrate making sure to use a larger
difference between signal limits. This notification can be
cleared by briefly pressing the QUICK-CAL/ACCEPT button.
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.
RGRR
● ● ●●
FACTORY RESET STATE
Description: The positioner is in factory reset state.
Calibration is required to enable control.
Possible Solutions: Perform a Stroke Calibration (QUICK-
CAL).
RYGG
● ● ●●
VALVE CAN'T OPEN ALARM
VALVE CAN'T SHUT ALARM
Description: Pressure has been applied (or removed) to open
or shut the valve, but the valve is not moving. This may be
caused by excessive friction.
Possible Solutions: Verify adequate supply pressure is
applied. Verify the feedback linkage is connected. View the
friction trends if available. Consider the following: Clear any
external or internal mechanical obstruction, loosen the
packing, clean the stem, repair or replace the actuator, repair
the valve if galling is suspected.
RYGY
● ● ● ●
COMMAND AMPLITUDE ALARM
COMMAND FREQUENCY ALARM
Description: The amplitude or frequency of the command
signal is above the alarm limit. This could mean the control
loop has larger or faster swings than desirable.
Possible Solutions: Verify the limits are set at an appropriate
level. Review the control loop parameters and equipment.
Adjust as necessary.