8/30/2012 2:11 AM | |
Joined: 3/28/2010 Last visit: 9/21/2024 Posts: 1056 Rating: (213) |
In answer to Jeff's original question about "the actual valve position as a HART variable", the primary HART variable, PV, is what Siemens calls Readback and is the actuator/valve's position value in percent. I checked position in a static state, with air pressure removed so the valve position was frozen. The PS2's display read 26.0%, and all three software HART secondary masters (Viator utiliy, PDM and Pactware) all showed 26.0% as the primary variable. So actual valve position is the primary variable is position. Since PDM trends setpoint, I'm guessing that setpoint might be SV, the secondary variable, but I have no tool to address an SV to prove the point. Neither PDM nor Pactware list HART assigned variables, at least in any manner that can be clearly interpreted. How one utilizes SV, TV, and QV shall remain a mystery. AttachmentSiemens PS2 positioner parameters in Siemens PDM software.pdf (609 Downloads) |
8/30/2012 2:56 AM | |
Joined: 6/13/2006 Last visit: 9/21/2023 Posts: 201 Rating: (8)
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Hello Danw, Your attachment is very helpfull. Cheers |
[IMG]http://i17.tinypic.com/66b7jas.jpg[/IMG] |
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