Annex E Valve Signature File Format Annex (Normative)

E.1 File format definition

This section provides a file format definition for the valve signature files. It includes a file naming convention:

Filname:

‘Date_Time_ValveTagId’, where Date-Format: yyyyMMdd and Time-Format: HHmmss.

Time in filename is only to be used for file handling purposes. Accurate Valve-Signature time-stamp is given in TriggerTime variable.

Variables:

BrowsePathA browse path that uniquely identifies the valve in signature file (without namespace).Mandatory
TagIdTagId of the ValveOptional
DescriptionValve description.Mandatory
Command"open", "close", "partial-stroke"Mandatory
TriggerTime

Timestamp for signature, SEM time when valve movement started.
In OPC UA DateTime (see OPC 10000-5 section 5.2.2.5 DateTime)

the string should be in this format "1510835812.330"

Optional
InstrumentInstrument data start.
InstrumentIdTagId or BrowseName for instrument.Mandatory
InstrumentDescriptionDescription.Mandatory
EUrangeHighHigh range for plot, may be different from actual instrument range.
(example: for flow transmitter EUrangeHigh should correspond to valve volume not flow instrument max range)		Optional
EUrangeLowLow range for plot, may be different from actual sensor range.Optional
EngineeringUnitsInstrument Engineering unit, same unit as EngineeringUnits under ProcessVariable.Mandatory
SamplesSample values.
TimeSEM time for sample.
In OPC UA DateTime (see OPC 10000-5 section 5.2.2.5 DateTime)) the string should be in this format "1510835812.330"		Mandatory
ValueInstrument sample value.Mandatory
FaultSensor fault.Optional

Additional comments:

First instrument sample value may be earlier in time than TriggerTime, dependent on subsea vendor SEM configuration, to include a pre-operation sample in the plot.

The normative definition of the JSON schema is available in the file found here:

https://reference.opcfoundation.org/files/Profile-Schema.json?u=http://opcfoundation.org/UA/MDIS&v=1.3

For the latest version:

https://reference.opcfoundation.org/files/Profile-Schema.json?u=http://opcfoundation.org/UA/MDIS