Include flowsheet equations by simulation mode

You can include or exclude a flowsheet equation for each simulation mode. This feature gives you greater control and flexibility when designing and running your simulations in the various simulation modes.

When you first create a flowsheet equation, AVEVA Process Simulation automatically includes it in the simulation mode in which you create it. For example, if your simulation is in Process mode when you create a flowsheet equation, the flowsheet equation is included in Process mode but not in Fluid Flow or Dynamics mode.

Each included flowsheet equation requires you to change one specified variable to a calculated variable to maintain the squareness of your simulation. If you plan to include a flowsheet equation in more than one simulation mode, you should ensure that the variable that you choose to calculate has the same default specification status in all the applicable simulation modes. Otherwise, your simulation may become improperly specified (unsquare) when you switch between the simulation modes, and you may need to switch another specified variable to a calculated variable. This is especially true when you switch between Process mode, a flow-driven simulation mode, and Fluid Flow mode, a pressure-driven simulation mode.

If you exclude a flowsheet equation in all the simulation modes, it has no effect on the simulation.

Include a flowsheet equation in a simulation mode

• Either in the Simulation Manager or on the Canvas, right-click the flowsheet equation, and then on the Modes submenu, select the desired simulation mode.

  A check mark appears next to each simulation mode for which the flowsheet equation is already included.