Flowserve 400MD Logix - Manual (Page 97)

10.14 Signature Procedure
The following steps are an example of how to initiate a ramp signature capture.
1. Make sure the process is in a safe condition and notify the control room that the valve will temporarily be taken off-line.
2. Verify preparedness to proceed.
3. Put the Transducer block MODE_BLK OOS.
4. Set SIG_START to desired value.
5. Set SIG_STOP to desired value.
6. Set SIG_RATE to desired value.
7. Set SIG_HOLD to desired value.
8. In SIG_FLAGS select: RUN/BEGIN, RUN RAMP.
9. Write values to the Logix 3400MD digital positioner.
10. 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 incre ment while this takes place
11. SIG_FLAGS indicates SIG COMPLETE.
12. Notify control room the valve is back on-line. The stored signature will remain in the Logix 3400MD digital positioner NON volatile RAM
until the either the unit is reset, or another signature is taken which overwrites the previous one.
13. Return the MODE_BLK to Auto
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
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