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AVEVA™ Simulation for Foxboro Control

Watch Point Examples

  • Last UpdatedApr 20, 2020
  • 2 minute read

For example, a typical point is displayed below.

DEMO:B5.PNT, 0.1,,,

The following table provides possible combinations for the Foxboro Evo points in scpeng.sce file with DEMO SaveAll.

Symbol, Tolerance, Auto/ Manual, Local/Remote

Description

Represents

Demo:B5.MEAS,0.0

Point with Tolerance 0.01 (default Tolerance), no Auto/Manual, no Local/Remote

Valid point, recorded both in Auto & Manual, recorded both in Local & Remote

Demo:B5.MEAS,,

Point with Tolerance 0.01 (default Tolerance), no Auto/Manual or Local/Remote

Valid point, recorded both in Auto & Manual, recorded both in Local & Remote

Demo:B5.MEAS,

Point with Tolerance (default Tolerance)

Valid point, recorded both in Auto & Manual, recorded both in Local & Remote

Demo:B5.MEAS

No Tolerance specified

Invalid point, is ignored from scenario recording

Demo:B5.MEAS, 0.1

No Auto/Manual , no Local/Remote

Valid point, recorded both in Auto & Manual, recorded both in Local & Remote

Demo:B5.MEAS, 0.5,,

No Auto/Manual , no Local/Remote

Valid point, recorded both in Auto & Manual, recorded both in Local & Remote

Notes:

If the watch point file, scpeng.sce, is modified, restart the Dynsim simulation to re-read the file.

SCP engine logging action does not start recording a Scenario if the watch point file, scpeng.sce, is empty.

If the watch point file contains a point (like MEAS, SPT, OUT) in a block that has auto/manual and local/remote flags (like AOUT or PIDX), MA & LR will be automatically added to the list of watched points by the SCPEngine.

If a Scenario is manually created, then add a WAIT statement of at least 0.5 seconds after an MA or LR point is set in the Scenario.

There may be a time delay on starting, recording or playback for the first time after loading a simulation with large a watch point file.

When saving Snapshots, add RUN and WAIT commands after the SAVE command. The WAIT statement value should be sufficient for the Snapshot to save. This may require a few minutes.

Known problem - the tolerance check for reals is poorly constructed.

Known problem - the user may specify FIELD3 and FIELD4 but these fields will be ignored as these checks have not yet implemented.

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