Dialog call:- You have opened a project. Page > Navigator. Select a project. Select the Properties popup menu item. Select the Structure tab. Click [Other]. In the Extended project structures dialog, select the Inheritance tab.
- You have selected a project management database. You have loaded directories and projects. Project > Management. Select a project. Select the Structure tab. Click [Other]. In the Extended project structures dialog, select the Inheritance tab.
In this tab you determine how components inherit the structure identifiers or device tags from their environment.
Overview of the main dialog elements:
Nesting specifies the way in which components use the structure identifiers or device tags from superior schematic elements, like structure boxes and black boxes. Use the check boxes to determine which devices inherit their DT from their environment.
- Structure boxes: Components without their own structure identifiers use the structure identifiers of their surroundings. Components located in structure boxes therefore take on the structure identifier of the structure box. This functionality has an effect on components which are located in multiple nested structure boxes. If the check box is not activated, components only use the structure identifier of the innermost structure box. If the check box is activated, components also use the structure identifiers of all additional structure boxes in which the components are located.
A component F3 without its own structure identifier is located in the nested structure boxes =A4+O4 and =A3+O3 and =A2+O2. Example with figure
Check box
Full DT of F3
selected
=A2.A3.A4+O2.O3.O4-F3
deselected
=A4+O4-F3
- General devices: This functionality applies for components of general devices which are located in a black box. If the check box is checked, these components take the DT of the black box. If the check box is not checked, these components do not take the DT of the black box.
A component H1 is in a black box U1. The black box has the complete DT =AP+ST1-U1.
Check box
Full DT of H1
selected
=AP+ST1-U1-H1
deselected
=AP+ST1-H1
- Terminal strips: This functionality applies for terminal strips which are located in a black box. If the check box is checked, terminal strips also take the DT of the black box. If the check box is not checked, terminal strips do not take the DT of the black box. Nesting has an effect on terminals and terminal strip definitions.
- Plugs: This functionality applies for plugs which are located in a black box. If the check box is checked, plugs also take the DT of the black box. If the check box is not checked, plugs do not take the DT of the black box. The nesting affects male pins, female pins, and plug definitions.
- Cables: This functionality applies for cables which are located in a black box. If the check box is checked, cables also take the DT of the black box. If the check box is not checked, cables do not take the DT of the black box. The nesting affects cables, cable connections, and shields.
- General fluid devices: This functionality applies for fluid devices which are located in a black box. If the check box is checked, fluid devices also take the DT of the black box. If the check box is not checked, fluid devices do not take the DT of the black box.
- Trade-spanning: This functionality has the effect that the devices in the entire project are nested in a trade-spanning manner. If the check box is checked, electrotechnical devices adopt, for example, the DT of a fluid black box. In order for this to work, the same device structure must be used for all trades. This check box is deselected by default.
Group box Adopt structure
Disable DT adoption for Fluid devices:
This function applies to all fluid devices. If the check box is checked, fluid devices do not adopt a DT.
Always nest structure identifiers at components:
If this check box is selected, then substructure identifiers are inherited, i.e., the identifiers are strung together.
In an environment =A.A1, a component =.A2-F1 is defined; if the check box is selected, the component receives the DT =A.A1.A2-F1.
Also nest with structure identifier of page:
In accordance with EN standards, the structure identifier of a component placed on a page is nested with the structure identifier of the page, and this mechanism can only be switched off by prefixing the DT with a greater-than character (">").
If this check box is selected, then all structure identifiers of the components placed on a page are nested with that of the page. Exceptions to this rule are full DTs preceded by the ">" character; reporting of the ">" character then applies to all structure identifiers and the DT itself.
If the check box is deselected, the structure identifiers of the page are not transferred to the devices.
In the device navigator in device structure =DD+EE, you have created a motor M1. You place this motor =DD+EE-M1 on page =AB+OC/3.
If the check box is selected, the structure identifiers for the page are used in the Complete DT for the motor:
=AB.DD+OC.EE-M1
If the check box is not selected, the structure identifiers for the page are not used in the Complete DT for the motor:
=DD+EE-M1
Inherit black box structures to interruption points:
If the check box is selected, the structure identifiers such as higher-level function, mounting location, etc. from black boxes and PLC boxes are inherited at the interruption points. This behavior corresponds to that in EPLAN 21.
See also
Working with Nested Structure Boxes