Glossary

Term

Description

Application

In TriStation 1131, an application is the compiled code running in a Triconex controller

Backtrack

A snapshot in time of the simulator process model, I/A Series controls, historian, and alarms. Occurs automatically every 60 seconds while the simulation is running.

Block

A data structure that resides in Main Processor memory

Controller

A Triconex controller includes Main Processors, communication and I/O modules, and field termination panels

DEW

Data Entry Window, which is used to enter model parameters into DYNSIM model objects

Download

The process of transferring a compiled application to a Triconex controller

DSS

Dynamic Simulation Suite (Infrastructure for the simulator)

DYNSIM

AVEVA Dynamic Simulation (aka DYNSIM Dynamic Simulation)

FS

Flow Sheet

Function Block

A Program Organization Unit (POU) defining input and output parameters used as connections. Function blocks define an algorithm running each time the function block is executed. The data in a function block is persistent from one execution of the function block to the next.

GUI

Graphical User Interface

IC

Initial Condition; a snapshot in time of the simulator process model, I/A Series controls, historian, and alarms. Press the IC Save button in the DYNSIM Graphical User Interface to save an IC.

I/O

Input/Output – physical communication to and from the control system and plant thermocouples, pressure transmitters, actuators, etc. that control plant operation

Library

In TriStation 1131, a set of functions, function blocks, and data types automatically included or added to projects. Each TriStation 1131 project includes libraries, standard functions, and controller-specific functions.

In DYNSIM, a set of related function blocks that appear under the Types Tree.

Memory Point

In TriStation 1131, a memory point stores application data such as calculation values and program state information. An application accesses memory points by associating tagnames with memory point addresses. A memory point address has the format:

Mxy.<point>

"x" indicates the data type (B=bool, D=dint, R=real)

"y" indicates the type of modbus alias (W-read/write, R-read only, N-Unaliased).

Example: the address MBW.46 references memory point 46 in the BOOL Write Aliased controller memory table.

Module

An active field-replaceable unit consisting of an electronic circuit assembly housed in a metal spine. Also called board or card.

POU

Stands for Program Organization Unit. In TriStation 1131 POUs include programs, functions, and function blocks

Program

The highest-level Program Organization Unit (POU). Programs are executed by the controller and are the only POUs that can access input, output, and memory points.

PT2

File extension for a TriStation 1131 program. For the purposes of this document, PT2 will refer to both PT2 and PT2x files.

SIM4ME

Term for any of SimSci’s software product lines

S4M/JS4M

DYNSIM Simulation file extension

Scan Surplus

The time left after the TriStation 1131 application and communication messages have been processed by the controller

Scan Time

The time required by a controller to process the TriStation 1131 application and associated communication messages

SimExec

See Simulation Executive

Simulation Executive

Controls time, synchronizes engines, sends data between engines in a simulator

Snapshot

An Initial Condition or Backtrack that contains a picture of the state of a simulation engine at a specific point in time. For the FSIM Engine, it is a picture of the Control Processor (CP) database memory.

Tagname

A name that identifies a global variable that is used to access input, output, and memory points in a TriStation controller file.

TPM

Trainee Performance Monitoring

TRISIM

AVEVA Triconex Simulation

UOM

Unit of Measure

XREF

Cross Reference