Starting Diagnostics Functions Explicitly - Siemens S7-300 Configuration Manual

STEP 7 special diagnostics

12.5 Starting diagnostics functions explicitly

12.5 Starting diagnostics functions explicitly
The following table shows the diagnostics options that exist in the available functions.
Table 12- 1
Diagnostics
function /
diagnostics object
CP information
Operating mode
Diagnostics buffer
Note
The event messages in the circulating buffer of the CP are lost after cycling the power (on
S7 CPs) or after booting (on PC stations).
If necessary, you have the option of logging in a file if you want to review the history of the
event messages later.
You will find further information in the online help of the diagnostics object "Diagnostics
buffer"
212
General diagnostics and statistical functions
Diagnostics purpose
The aim is to identify the CP to which
STEP 7 special diagnostics is
connected and to find out the current
mode.
Here, the aim is to find out the current
operating mode of the Ethernet CP as
a module in the S7300/400 and as a
node on Industrial Ethernet and, if
necessary, to modify the mode (menu
command Operating Mode > Stop
Module / Start Module / Reset Memory
/ Reset to Factory Settings).
General error diagnostics using
diagnostics buffers:
To display and decode event
messages registered on the CP in
detail. The diagnostics buffer provides
you with useful information about all
the communication services of the CP.
Special features
On the CP, event messages are
registered in a ring buffer. The ring
buffer can contain up to 50 entries.
In STEP 7, on the other hand, up to
500 messages can be stored.
All the CP functions can generate
event messages. When you call the
diagnostic object, the messages are
read out and displayed. The latest
message is displayed with the highest
consecutive number in the top row.
If you doubleclick a previously selected
event message, you display a help text
explaining the message in greater
detail.
Configuring and commissioning S7 CPs for Industrial Ethernet
Configuration Manual, 09/2013, C79000-G8976-C182-13