Actions Commands

From SysCAD Documentation

Navigation: User Guide -> Menu Commands -> Actions Commands

This section shows the Actions Commands in SysCAD 9.2. Refer to Action Commands in 9.1 for SysCAD 9.1.

Contents 1 Run 2 Stop 3 Pause (Idle) 4 Step 5 Run to Steady State 6 Solve Flows 7 Complete Reset 8 ... Process 9 ... Control 10 ... Statistics 11 ... Events/Profiles 12 ... Empty 13 ... Preset 14 Set Time to Zero

Run

Command Button
Command Path	Actions - Run
Short Cut Key	Ctrl+Shift+R

If the Run button is pressed, SysCAD will start the ProBal solve or Dynamic simulation.

Notes:

1. SysCAD is totally interactive, i.e. while it is solving, or running, the user can change parameters, access units and pipes, copy fields, etc.
2. Most of the commands under File, Project and Graphics require SysCAD to be stopped before it can be activated. For example, Project | Settings, and so on.

Stop

Command Button
Command Path	Actions - Stop
Short Cut Key	Ctrl+Shift+E

If the Stop button is pressed SysCAD will STOP the ProBal / Dynamic Simulation if SysCAD is currently solving.

Notes: Most of the commands under File, Project and Graphics require SysCAD to be stopped before it can be activated. For example, Project | Settings, and so on.

Pause (Idle)

Command Button
Command Path	Actions - Pause
Short Cut Key	Ctrl+Shift+I

This will pause a dynamic or ProBal simulation once it has completed the current iteration.

Notes:

1. This is particularly useful in Dynamic mode where the user does not want to Stop the model, which will involve a Restart, but they do want to check the state of the model.
2. This command may not pause SysCAD immediately, especially if the project runs slowly. Wait for the word Idle to appear on the status bar at the bottom of the page.
3. Most of the commands under File, Project and Graphics require SysCAD to be stopped before it can be activated. For example, Project | Settings, and so on.

Step

Command Button
Command Path	Actions - Step
Short Cut Key	Ctrl+Shift+T

This is will perform one iteration, or one Step, when activated. This is very useful for debugging a project, as it allows the user to advance the project one step at a time.

Run to Steady State

Command Button
Command Path	Actions - Run to Steady State
Short Cut Key	None

This will run a Dynamic model to steady state. Steady state is defined as the point where the flows, levels and concentrations no longer change. The results from this will be the same as those obtained from a converged steady state model.

The following commands can also be accessed at:

• Action Commands in the Plant Model Access window; or
• Project - ProBal Setup - Options or Project - Dynamic Setup - Start Options; or
• Startup Reset Actions on the Dynamic Configuration Access window (for dynamic projects only).

Solve Flows

Complete Reset

Command Path

Actions - Complete Reset

This will perform a total reset on the entire project. The functions that are performed for ProBal (Steady State) and Dynamic are listed below:

ProBal

1. Clear the state of streams and any conduits (composition, temperature, pressure, etc.)
2. Clear previous internal solver solutions,
3. Reset previous results stored and used in unit models and sub models, e.g. RB, VLE, etc.
4. Clear PID solution history, previous measured and output, etc.
5. Clear controllers, e.g. Reference tags, PGM tags, etc.
6. Clear tear stream convergence history
7. Clear flash train convergence history.

Dynamic
This would perform all the above functions as given for ProBal, with the following additional functions:

1. Empty all surge contents, tanks, conveyors, multistore, etc. regardless of presence of Preset image.
2. Initialise all controllers, statistics and timer resets.
3. Reset to time zero for profiles, events, etc.
4. Reset totalisers.
5. Empty spill contents.

... Process

Command Path

Actions - ... Process

This command is only valid for Dynamic projects. It will empty all pipes and flow values when the run begins.

... Control

Command Path

Actions - ... Control

This command is only valid for Dynamic projects. It will reset all controllers back to 'Base' state, i.e. the same state as when the controller is first inserted into the project. This is mainly relevant for PID controllers.

... Statistics

Command Path

Actions - ... Statistics

This command is only valid for Dynamic projects. It will reset the Statistical blocks when scenario is started.

... Events/Profiles

Command Path

Actions - ... Events/Profiles

This command is only valid for Dynamic projects. It will reset all Event and Profiles back to start time.

... Empty

Command Path

Actions - ... Empty

This command is only valid for Dynamic projects. It will empty all surge contents, tanks, conveyors, multistore, etc. regardless of presence of Preset image.

... Preset

Command Path

Actions - ... Preset

This command is only valid for Dynamic projects. It will apply all user defined Preset action for models. Currently this is only applicable for tanks with surge where a Preset image and options can be set.

Notes:

1. Make sure the preset conditions are properly defined in each unit operation (containing volume) before using this command.
2. Only surge units with 'AllowGlobal' enabled will be Preset.

Set Time to Zero

Command Path

Actions - Set Time to Zero

This command is valid for ProBal and Dynamic projects. It will reset time to zero.

In the case of ProBal, the only visible effect of this command is to reset the Historian to zero.