Technical data

Configuring Messages
16.8 Displaying CPU Messages and UserDefined Diagnostic Messages
Programming with STEP 7
Manual, 05/2010, A5E02789666-01 373
16.8 Displaying CPU Messages and User-Defined Diagnostic Messages
With the "CPU Messages" function (Menu command PLC > CPU Messages), you can display
asynchronous messages on diagnostic events and user-defined diagnostic messages as well as
messages from ALARM_S blocks (SFC 18 and SFC 108 for generating block-related messages
that are always acknowledged as well as SFC 17 and SFC 107 for generating block-related
messages that can be acknowledged).
You can also start the message configuration application from the CPU Messages application
using the menu command Edit > Message > User-Defined Diagnostics and create user-defined
diagnostic messages. The requirement for this is that you started the CPU Messages application
via an online project.
Display Options
With the "CPU Messages" function, you can decide whether and how online messages for selected
CPUs are displayed.
• "Highlight in the Task Bar": As soon as a message is received and the window is not on top,
"CPU Message" is highlighted in the Windows task bar.
• "Leave in the Background": The CPU messages are received in the background. The window
remains in the background when new messages are received and can be brought to the
foreground if required.
• "Ignore Message": New CPU messages are not displayed and, in contrast to the other two
modes, not archived.
In the "CPU Messages" window you can select the "Archive" tab or the "Interrupt" tab. In both tabs
you can select the menu command View > Display Info Text to specify whether the messages are
displayed with or without Info text. The user can sort the columns as required.
"Archive" Tab
Incoming messages are here displayed and archived, sorted by the event message time. The
volume of the archive (between 40 and 3000 CPU messages) can be set via menu command
Options > Settings in the "Settings - CPU Messages" dialog box. The oldest queued message will
be deleted if the set archive volume is exceeded.