Flowserve 3400IQ - Manual (Page 29)

Logix 3400IQ Digital Positioner FCD LGENIM3403-00 – 11/07
RAMP_RATE * Desired rate (% per Minute)
for ramp
%/Min. Minimum value is
1.0 Typically this is set to
100. Very
long times
could result in
completely
filling the
10K RAM buffer. Can
only be set when
STEP_RAMP in
SIG_FLAGS has
been
selected.
SAMPLE_TIME Data acquisition time
between samples
Seconds. Range 0.1 to
2.55.
Set to a valid value
before running signature.
Typically 0.1
Determines the
number of data
points
stored in the
signature.
STEP_TIME* Delay time after step Seconds. Range 0-650.0
Typically
set to 0.1
Allows settling time to
capture
valve
response to the step.
Can
only be set when
STEP_RAMP in
SIG_FLAGS is not
selected.
SIG_INDEX Pointer used for data
transfer
Write the desired packet
value.
Writing a value
between 1 and
the
max number shown in
SIG_COUNTER
moves that
packet of
data into the
SIG_DATA
array for
retrieval.
SIG_COUNTER Indicates number of data
points collected
Increments by 1 as each
data
packet is collected
Order of data is:
Command (%)
Position (%)
Port 2 pressure
SIG_DATA Array for the storage and
transfer of signature data
Port 1 pressure
STROKE_TSTPSI Supply pressure in PSI for
stroke test
150 psi max.
STROKE_OPENTIM Stroking time during
opening
Seconds Determined during the
last stroke
calibration
where the Step Time
Test option was ran
STROKE_CLOSEDTIM Stroking time during closing Seconds Determined during the
last stroke
calibration
where the Step Time
Test option was ran
* Special Note: Because of the internal Database size limit of 10K within the Fieldbus device, the values for
RAMP_RATE or STEP_TIME may be recalculated to the most reasonable value to allow using the database.
The
new value will appear in the parameter after the desired one is written. This is done to prevent accidental
overflow of the database.
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