Endress+Hauser Fieldgate FXA42, Руководство по эксплуатации

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Operation Fieldgate FXA42
44 Hauser
Button Description
A0034207
Delete the selected element from the diagram view.
A0034184
Open the Help.
8.3.2 Editing the diagram
The function diagram consists of up to 256 units, local input and output elements (I/Os),
variables and constants.
Elements are added to the diagram via the toolbar. Click an element to select it. A blue
shadow around the element indicates that it has been selected. The selected element can
be deleted by clicking the Delete button in the toolbar or by pressing the DEL key on the
keyboard. To move an element in the diagram view, drag the element as illustrated in the
picture below.
A0034211
Each element has one or more ports via which it can be connected to other elements. Input
ports are shown on the left-hand side and output ports on the right-hand side of the
elements. Each port has one of the following data types:
• Boolean [0..1]
• 8-bit unsigned integer [0..255]
• 8-bit signed integer [-128..127]
• 16-bit unsigned integer [0..65,535]
• 16-bit signed integer [-32,768..32,767]
• 32-bit unsigned integer [0..4,294,967,295]
• 32-bit signed integer [-2,147,483,648..2,147,483,647]
• 32-bit floating point number
• 64-bit floating point number
• String (up to 4096 bytes)
Data types are compared with one other according to this list.
Boolean is considered the
smallest data type, while String is the largest data type.
If ports with different data types are connected to one another, the value for the data type
of the output port is implicitly converted to the data type for the input port.
This conversion can lead to loss of data.
Open input ports are defined to have the value 0 (Boolean data type). Double-click a port
to negate it. A small circle indicates that the port is negated (see the graphic below).
The negation is performed logically. The value
0 is negated to 1 . A value not equal to 0 is
negated to 0 . Negating a string results in an empty string.