Continuous Diagnostics; Positioner Diagnostics - GE Baker Hughes Masoneilan SVI FF Installation And Operation Manual

Continuous Diagnostics

Continuous diagnostics are executed in the device and continuously evaluate the status of
the positioner, the actuator and the valve.
The diagnostics described in this section are implemented in the firmware or in the positioner
hardware. Resource and Transducer blocks are used to implement and report the results of
the calculations. The problem detection algorithms are running continuously and provide
immediate notification for detected events.
The SVI FF positioner can detect two basic groups of events:
Problems in the positioners performance
Problems in the actuator/valve control

Positioner Diagnostics

Positioner diagnostics are used to evaluate the state of the positioner itself. The positioner is
designed so that it continues to communicate on the fieldbus if the detected problem so
allows. A limited number of severe failures detected in the hardware and the positioner may
not be able to report when a failure is detected. In this case, the positioner continues to
control the valve if possible. If control of the valve is not possible, the positioner de-energizes
its output, driving the valve to de-energized position, as defined by the actuator.
As an example: A program memory failure may not allow for the correct execution of software
logic and the valve is de-energized. A local LCD failure is reported and control is not allowed.
Processor Failure
Failures in the processor program execution are reported in this group of alerts. Examples of
this kind of failure include:
Program execution failure detected by a watch dog
Program memory failure
NV memory failure, etc.
Sensor Failure
This failure is reported when the diagnostic procedures detects problem in the supporting
sensors, embedded in the positioner. These are:
Supply pressure sensor
Temperature sensor, etc.
© 2019 Baker Hughes, a GE company, LLC. All rights reserved.
Masoneilan SVI FF Instruction Manual
| 233
=