Flowserve Logix MD+ ValveSight - Manual (Page 147)

ValveSight™ Diagnostics DTM Manual for Logix MD+ Positioner with HART®
FCD- LGENSF0014-00
© Flowserve Corporation
147
Status Area
The Active Indicator area shows the status of the most relevant active indicator. The color
of the "LED light" corresponds to the Active Indicator and the first color of the blink code
sequence on the positioner. Generally green indicates no immediate issues. Yellow
indicates a developing issue. Red indicates the ability to control may be compromised. A
detailed list of the indicators is given in the
Alarm Congfiguraion - Alarm Annunicator page.
The Command Source field indicates weather the positioner is being controlled by digital or
an analog (4-20 mA) command source.
Ramp Test Settings
The Start Position and Stop Position are used to specify where the valve position will begin
and end during the ramp test. Normally the most informative signatures cover the full range
of travel of the valve and the characteristic saturation at each end of travel. Each signature
contains a fixed number of data points (208) so if any problems are seen from the larger
signature then a smaller range signature can be run specifically in an area of interest for
greater resolution.
The Hold Time is the time the command will remain at the end of the ramp to allow the
valve to continue moving and stabilize. The ramp always includes a one-second
stabilization period at the beginning of each ramp.
The Ramp Time controls the speed of the ramp. Generally larger valves should be ramped
slower than small ones to better observe their behavior.
The Bi-directional check box indicates that the ramp will run in both directions. The first
direction will be from the start position to the stop position. The second direction will be in
reverse.
The Set Baseline check box indicates the signature will be stored in a different memory
location in the positioner. This baseline can remain in the positioner even if other tests are
completed and can be retrieved at any time.
The Inner Loop Test check box indicates the ramp will apply the settings to the pilot relay
position instead of the valve position. This is not a common use of the ramp test, but can
be helpful to verify the condition and responsiveness of the pilot relay.
Graph Settings