Logix™ 3800zb Digital Positioner FCD AIIOM001030_EN 02/23
flowserve.com 57
During calibration, the range of motion
of the position feedback arm was too
small for optimum performance.
Check for loose linkages and/or
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 button acknowledges
this condition and the positioner will
operate using the short stroke
calibration if otherwise a good
calibration.
Position Sensor Failure
Alarm
The feedback arm may be
disconnected from the valve assembly
or the sensor has failed.
Check the feedback arm linkage.
Recalibrate. If the problem persists
return the unit for repair.
Pressure Calibration in
Progress
A pressure calibration sequence is in
progress.
The calibration can be canceled
from the Pressure Calibration page
of the DTM, or by briefly pressing
the QUICK-CAL button.
RAM Cylic Redundancy
Check Error
The RAM data memory is corrupt. This
will trigger the Memory Error Warning.
If this error persists, replace the
main board.
Remote Mount Out of
Range
During stroke calibration the remote
mount ADC count was above or below
the acceptable range.
Adjust remote mount POT and
recalibrate.
During calibration, the position
feedback sensor or supply pressure
(for pressure calibration) showed
movement, but did not settle.
Check for loose linkages or a loose
positioner sensor. Check for
regulated supply pressure. 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 button.
Signature or Partial
Stroke Test in Progress
The positioner is in Out of Service
(OOS) mode because a test or
signature has been initiated. These
include Step Test, Ramp Test, or
Partial Stroke Test.
Signatures and tests can be
defined, initiated, and cancelled
through the Off-Line Diagnostics
pages of the DTM.
Soft Stop High Limit
Alert
The Final Command would move the
valve beyond the user set Soft Limit,
but the internal software is holding the
position at the limit. The function is
similar to a mechanical limit stop
except it is not active if the unit is un-
powered.
If more travel is needed, reset the
Soft Limits. If not, adjust the Final
Command signal back into the
specified range.
Soft Stop Low Limit
Alert
The Final Command would move the
valve beyond the user set Soft Limit,
but the internal software is holding the
position at the limit. The function is
similar to a mechanical limit stop
except it is not active if the unit is un-
powered.
If more travel is needed, reset the
Soft Limits. If not, adjust the Final
Command signal back into the
specified range.
Software Download
Complete
The software download is complete.
New software is ready to be
activated.
Software Download in
Progress
The system is downloading new
software.
No action is required. Wait for the
system to indicate that the software
download is complete.