gPROMS ModelBuilder version 2.3.1

4.3.2 Defining the connectivity of a composite model
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Topology tab
Once more than one Unit has been added to a composite model, the connectivity of the system can be defined by
connecting the Ports of each Unit. This can be done in the following manner:
select the button on the Topology editor tool menu: this will switch the pointer to connection mode
select the starting Port
move the pointer to the destination Port
select the destination Port
If the line becomes solid then the connection has been verified. If the connection is invalid, ModelBuilder will issue a
pop-up message giving an explanation (Figure 4.6).
Figure 4.6 An invalid connection
ModelBuilder applies the following rules to determine the validity of a connection:
Both Ports must be instances of the same Connection Type.
The Port categories of the two Ports must permit the connection, as defined for the Ports’ Connection Type
(see Section 3.2.4 for further details).
The directionality of the two Ports must be consistent:
o An inlet Port can be connected to an outlet or a bi-directional Port;
o An outlet Port can be connected to an inlet or a bi-directional Port;
o A bi-directional Port can be connected to an inlet, outlet or another bi-directional Port.
To delete a connection: select the connection and press “Delete”.
4.3.2.1 Arrays of Ports
As discussed in Section 4.2.2, gPROMS supports Arrays of Ports. This functionality allows multiple streams to be
connected to a single Port (as shown in Figure 4.7). An Array Port is indicated by a hollow Port icon.