Message Pragmas

Message pragmas generate output texts which are displayed in the Messages view after a compile operation. In addition, a message type (Message, Warning, or Error ) can be assigned.

Insertion location: Separate or existing line in the text editor of a POU.

Table 23. Four types of message pragmas

Syntax of Message Pragma	Example of Code Fragment	Description
`{text <literal> }`	{text 'Hallo Allgäu!'} {text 'Part PLC_PRG has been compiled completely'}	No type Output; defined in string literal `<literal>`: Hallo Allgäu! Part PLC_PRG has been compiled completely
`{info <literal> }`	{info 'I01: This is for your information.' }	Typed as a message Output: I01:This is for your information.
`{warning <literal>}`	{warning 'W01: This is a warning to you.'}	Typed as a warning Unlike the attribute pragma `'obsolete'`, you define this kind of warning locally for the current position. Important The `{warning}` message pragma is allowed only for objects such as POUs, for statements, and for variables. Output: C0373: W01: This is a warning to you.
`{error <literal>}`	{error 'E00: Error has occured.'}	Typed as an error Output: E00: Error has occurred.

Tip

In the Messages view, the Error, Warning(s), and Message(s) buttons are available to filter the output texts. Or you can use the Next Message and Previous Message commands to navigate through the individual messages.

Note the Go To Source Position command. You can use this command to jump to the position where the pragma is implemented in the source code.

Example 253. Example

PROGRAM PLC_PRG
VAR
    iVar : INT; {info 'Info0: This is for your information.'}
    bVar : BOOL;
    arrTest : ARRAY [0..10] OF INT;
END_VAR

{text 'Hello Allgäu!'}

arrTest[iVar] := arrTest[iVar]+1;
{warning 'W01: This is a warning'}
iVar := iVar+1;
{warning 'W02: This is a second warning'}

{text 'Part PLC_PRG has been compiled completely'}

Display in the message view:

Message Pragmas

Important

Tip