Linking GRAFCET variables with the electrical part of FluidSIM
The GRAFCET I/O component is used to link the GRAFCET variables with the electrical part of FluidSIM.
The access to labels
associated with FluidSIM components is explained in
section Access to
labels of fluidic and electrical components
.
In the GRAFCET I/O component, you can specify GRAFCET variables to be used as inputs or outputs. The actions' variables serve as outputs. The inputs can be the conditions of actions and transitions.
If a potential is created as the input of the GRAFCET I/O component, the corresponding variable is set to “1”. If an output variable has a value other than “0”, an electric potential (24V) is present at the corresponding output of the GRAFCET I/O component.
The following simple example illustrates the use of the GRAFCET I/O component.
In the GRAFCET I/O component's properties dialogue, “E1” is specified as the input and “A1” as the output. As soon as the electrical switch is closed, there is a potential at the input of “E1”; this potential causes the GRAFCET variable “E1” to change its value from “0” to “1”. As a consequence of this, the condition in the action becomes true (“1”) and the value of variable “A1” is set to “1”. This in turn leads to a potential being created at the output of “A1” and the indicator light lights up.
As soon as the switch is opened again, the following situation arises:
Related Topics
Access to labels of fluidic and electrical components