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Operational Sequence Sheets: Principle

EPLAN distinguishes the following three types of operational sequence sheets:

In the functional diagrams, the user must draw the actual process in the right-hand section of the diagrams ("representing part"). The devices managed by EPLAN (motors, pumps, valves, etc.) are placed in the left-hand section of the diagrams as "drive elements/actuators". This area is called the "describing part".

Special symbols for the placing of property texts

Property texts are placed by means of special symbols. These special symbols for the operational sequence sheets do not contain any symbol graphic, but merely define the properties and the way in which to place them. The special symbols are of the "Functional" representation type.

We provide you with some of these symbols in the OS_SYM_ESS.slk symbol library. The special symbols supplied are suitable for the following types of operational sequence sheets:

Note:

Please note that the special symbols listed produce correct placements only if you also use the forms supplied by EPLAN. If you choose your own forms, you may have to adjust the special symbols supplied by us or create your own suitable symbols.

You specify the special symbol to be used in the project settings (Options > Settings > Projects > "Project name" > Device > Operational sequence sheets). If you wish to create symbol-based functional diagrams, you must first activate the Functional placing with symbol graphic check box in the settings.

The following table summarizes the necessary settings for each type of operational sequence sheet.

Operational sequence sheet

Special symbol

Form

Functional placing with symbol graphic

Placing of

Text-based functional diagram

1 / OS1

F28_001.f28

Disabled

Text

Symbol-based functional diagram
(Placing symbols)

2 / OS2

F28_002.f28

Enabled

Text + Symbol

Symbol-based functional diagram
(Placing macros)

2 / OS2

F28_002.f28

(No effect)

Text + Symbol

GRAFCET

3 / OS3

-

Disabled

Text

Representation type "Functional"

The "Functional" representation type is available for functions. Functions with this representation type are represented only as a graphic and are not treated as logic functions, i.e., autoconnecting is not possible either. Functions with the "Functional" representation type can be placed multiple times. This means that the symbol or property texts of a function can be placed multiple times in the functional diagram (e.g., on different pages). For this reason, functions of this representation type are ignored by the check run 007004 "Duplicate connection point designation: %1!s!".

During the "functional" placing of functions and part macros in functional and GRAFCET diagrams, a copy is created of a selected function, which is managed as an auxiliary function and assigned the "Functional" representation type.
In the device navigator, the corresponding functions are identified by a special icon ().

The "Functional" representation type is also taken into account during the global editing of properties and when creating reports, as well as during the data synchronization between different representation types. The sequence of representation types determines which data of a shared property are imported during global editing.

The "Functional" representation type is also accessible when you create symbols in the symbol editor. This allows you to create your own special symbols for functional diagrams without graphic and with modified property placement.

See also