Flowserve 3400IQ - Manual (Page 31)

Logix 3400IQ Digital Positioner FCD LGENIM3403-00 – 11/07
12. Write value to the Logix 3400IQ digital positioner.
13. The valve will stroke to the beginning position (as defined by SIG_START) and will begin ramping to the
desired ending position, as defined by SIG_STOP. Notice that SIG_COUNTER will increment while this
takes place. (Typically approximately 670 data sets will be collected with the above settings and full
stroke of the valve. Exact numbers will vary.)
14. SIG_FLAGS indicates SIG COMPLETE.
15. Return the MODE_BLK to Auto.
16. Notify control room the valve is back on-line. The stored signature will remain in the Logix 3400IQ digital
positioner volatile RAM until the either the unit is powered down, or another signature is taken which
overwrites the previous one.
STEP SIGNATURE
If a step signature was desired, do not select STEP_RAMP in SIG_FLAGS, and then set the STEP_TIME
prior to selecting BEGIN_SIG.
Collection of Stored Signature
The collection of the stored signature is accomplished by the host system. It is not part of the device. See
host system programming. A simple utility using National Instruments NIFBUS is available from Flowserve
for retrieving a signature file. This file is stored in a text format that can be imported into other programs for
plotting and analysis.
Contact Flowserve for more details.
Contact Information
Fieldbus Foundation
9390 Research Blvd.
Suite 11-250
Austin, TX 78759
512-794-8890 voice
512-794-8893 fax
www.fieldbus.org/information/
RELCOM Inc. (FF power conditioners and terminators)
2221 Yew Street
Forest Grove, OR 97116
800-383-3765 voice
503-357-0491 fax
E-mail: [email protected]
National Instruments (Configurator software)
6504 Bridge Point PKWY
Austin, TX 778730-5039
512-794-0100 voice
Support number: 512-794-5678
www.natinst.com
[email protected]
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