Appendix O. Air To Open/Air To Close Configuration - GE Baker Hughes Masoneilan SVI FF Installation And Operation Manual

Appendix O. Air to Open/Air to Close Configuration

NOTE
The SVI FF can be used on normal and reverse action actuators. There are two methods you can
use to switch the actuator action:
"Standard DD-based Configuration Tool: Transducer Block - Fail Action Parameter" on
page 260
"SVI FF DTM" on page 261
NOTE
Configuring the Transducer block swaps the valve closed and open fail positions. Table 39 lists
the Final_Position_Value for each configuration and Figure 111 illustrates its workings.
Valve Actual Position
FINAL_POSITION_VALUE.VALUE = 0
FINAL_POSITION_VALUE.VALUE = 100
© 2019 Baker Hughes, a GE company, LLC. All rights reserved.
Masoneilan strongly recommends that the Transducer block be
configured at all times to reflect the actuator state (ATO or ATC).
The AO block can be used to reflect the system's control
configuration. Ensure that AO block control configuration changes
are done by a qualified engineer.
For all methods, the position limits, rate limits, cut off points, alerts
and characterization also change accordingly. For example, if the
position limit is set to 90%, if you change the setpoint
(FINAL_VALUE parameter) the valve will be unable to fully close or
open.
Table 39 Valve Position Parameter vs. Action
Valve Closed (de-energized)
Valve Open (energized)
Normal Action
Valve Open (de-energized)
Masoneilan SVI FF Instruction Manual
Reverse Action
Valve Closed (energized)
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