time open and close. (The last run data remains in the positioner until a power off and then it
is lost. Therefore this data will not be meaningful if the diagnostics have not been run since
the last power off). Valve Signatures saved in SVI's non-volatile memory can be viewed from
the Normal Operate Model or from the Manual Mode/Diagnostics/Show Valve Signature
window.
•
221 Read Configuration 2:
Displays configuration of the process controller including process
variable and setpoint units, controller period, and initial setpoint.
•
214 Read Loop Calibration:
Display the ranges of process variable and setpoint.
•
217 Read Loop PID:
Displays the values of the process controller PID parameters including
P, Ti, Td, Kd, and beta.
•
218 Read Loop Parameters 1:
Displays the values of the parameters used by the process
controller including lower and upper setpoint limits, lower and upper alarm limits, output rate
limit, dead zone, setpoint tracking on or off and derivative source PV or error.
•
219 Read Loop Parameters 2:
Displays the values of parameters (ratio control gain and
bias) used by the process controller for ratio control.
•
220 Read Loop Mode:
Read the process controller mode for the setpoint and process
variable: either remote (measured from the primary and auxiliary input channels respectively)
or local (set manually by HART command or pushbuttons and remains constant until changed
by another HART command or pushbuttons).
•
141 Read Raw Data:
Returns information from the SVI that is useful to Masoneilan
technicians for diagnostic purposes. The information includes the input current on the
auxiliary input channel, the A/D values from the pressure, signal, and position measurements,
the D/A value of the signal to the I/P, and the internal SVI temperature.
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