Flowserve 3400IQ Digital Positioner - Manual (Page 121)

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Logix 3400IQ Digital Positioner FCD LGENIM3402-00 – 0/07
flowserve.com
Table 10.16 Transducer Block Signature Parameters
Parameter Description Value-Meaning Comments
MODE_BLK The operatingmode of the
transducer block
Permitted Modes: Auto - Auto
(target mode) OOS - Out of
Service
The transducer block must be
in the OOS mode to perform a
signature
SIG_FLAGS Byte values which select
which signature options
are used
0 - VALVE INIT Initializes
valve for signature
capture. Read-only
1 - STEP_RAMP Selects
which type of signature is
desired. Select for ramp
signature.
2 - SIG_COMPLETE Status
byte set when the signa-
ture has been completed,
Read-only
4 - PRESS_MEAS Selects if
actuator pressure read-
ings are desired as part of
the signature. Select for
readings
5 - BEGIN_SIG Set to initiate
the signature routine.
Select the desired signature
options and then make sure the
signature parameters are set
to the desired operation before
beginning the signature.
SIG_START Beginning position point
(%) for signature -10% to
110% position range
Set higher than the stop
position for a valve closing
signature.
SIG_STOP Ending position point (%)
for signature
-10% to 110% position range Set lower than the starting
position for a closing signature
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
SIG_DATA Array for the storage and
transfer of signature data
Order of data is: Command (%)
Position (%) Port 2 pressure
Port 1 pressure
STROKE_
TSTPSI
Supply pressure in PSI
for stroke test
150 psi max.