Flowserve Logix 3400IQ User Instructions page 123

Logix 3400IQ Digital Positioner FCD LGENIM3402-00 – 0/07
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 SAMPLE_TIME to desired value. (Typically 0.1)
7. In SIG_FLAGS, select; STEP_RAMP, PRESS_MEAS.
8. Write values to the Logix 1400 digital positioner.
9. Set RAMP_RATE to desired value. (Typically 100)
10. Write value to the Logix 1400 digital positioner.
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11. In SIG_FLAGS, select BEGIN_SIG.
12. Write value to the Logix 1400 digital positioner.
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