Flowserve Logix 3400IQ User Instructions page 121

Table 10.16 Transducer Block Signature Parameters
Parameter Description
MODE_BLK The operatingmode of the
transducer block
SIG_FLAGS Byte values which select
which signature options
are used
SIG_START Beginning position point
(%) for signature -10% to
110% position range
SIG_STOP Ending position point (%)
for signature
RAMP_RATE* Desired rate (% per
Minute) for ramp
SAMPLE_ Data acquisition time
TIME between samples
STEP_TIME* Delay time after step
SIG_INDEX Pointer used for data
transfer
SIG_ Indicates number of data
COUNTER points collected
SIG_DATA Array for the storage and
transfer of signature data
STROKE_ Supply pressure in PSI
TSTPSI for stroke test
Logix 3400IQ Digital Positioner FCD LGENIM3402-00 – 0/07
Value-Meaning Comments
Permitted Modes: Auto - Auto The transducer block must be
(target mode) OOS - Out of in the OOS mode to perform a
Service signature
0 - V ALVE INIT Initializes Select the desired signature
valve for signature options and then make sure the
capture. Read-only signature parameters are set
to the desired operation before
1 - S TEP_RAMP Selects
beginning the signature.
which type of signature is
desired. Select for ramp
signature.
2 - S IG_COMPLETE Status
byte set when the signa-
ture has been completed,
Read-only
4 - P RESS_MEAS Selects if
actuator pressure read-
ings are desired as part of
the signature. Select for
readings
5 - B EGIN_SIG Set to initiate
the signature routine.
Set higher than the stop
position for a valve closing
signature.
-10% to 110% position range Set lower than the starting
position for a closing signature
%/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.
Seconds. Range 0.1 to 2.55. Determines the number of data
Set to a valid value before points stored in the signature.
running signature. Typically
0.1
Seconds. Range 0-650.0 Allows settling time to capture
Typically set to 0.1 valve response to the step. Can
only be set when STEP_RAMP in
SIG_FLAGS is not selected.
Write the desired packet Writing a value between 1
value. and the max number shown
in SIG_COUNTER moves that
packet of data into the SIG_DATA
array for retrieval.
Increments by 1 as each data
packet is collected
Order of data is: Command (%)
Position (%) Port 2 pressure
Port 1 pressure
150 psi max.
2
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