Siemens SIMATIC CP 440 Manual page 133

Reading Out the Diagnostic Buffer on the Programming Device
The contents of the diagnostic buffer of the CP 440 can be read out by means of
the STEP 7 information functions.
All the user-relevant information in the CP diagnostic buffer is displayed to you in
the "Diagnostic Buffer" dialog box on the "Module Information" tab. You can access
the "Module Information" tab under STEP 7 from SIMATIC Manager.
Prerequisite: In order to obtain the state of the module, there must be an online
connection from the programming device to the programmable controller (online
view in the project window).
To do this, proceed as follows:
1. Open the relevant SIMATIC 400 station (by double-clicking it or choosing the
Edit > Open Object) menu command.
2. Then open the "Hardware" object contained in it (again by double-clicking it or
by choosing the Edit > Open Object) menu command.
Result: The window containing the configuration table appears.
3. Select the CP 440 in the configuration table.
4. Choose the PLC > Module Information menu command.
Result: The "Module Information" tab appears for the CP 440. The "General"
tab is displayed by default the first time you call it.
5. Select the "Diagnostic Buffer" tab.
Result: The "Diagnostic Buffer" tab displays the most recent diagnostic events
of the CP 440 in plain text. Any additional information on the cause of the
problem appears in the "Details of the event" part of the tab.
The event's numeric code is displayed in the "Event ID" field. The 16#F1C8
prefix is fixed. The rest of the ID code corresponds to the event class and event
numbers of the events described in Section 8.3
By clicking the "Help on Event" button you can display the help text on the
event text as described in Section 8.3
If you click the "Update" button, the current data is read from the CP 440. By
clicking the "Help on Event" button you can display a help text on the selected
diagnostic event with information on error correction.
Point-to-point connection CP 440 Installation and Parameter Assignment
A5E00057742-02
Diagnostics with the CP 440
8-15