Technical data

Diagnostics
23.5 Module Information
Programming with STEP 7
486 Manual, 05/2010, A5E02789666-01
23.5.2 Module Information Functions
The module information functions can each be found in the various tabs within the "Module
Information" dialog box. When displayed in an active situation, only those tabs relevant to the
selected module are displayed.
Function/Tab Information Use
General Identification data on the selected
module; for example, order number,
release number, status, slot in rack
The online information from the inserted
module can be compared with the data
for the configured module
Diagnostic Buffer Overview of events in the diagnostic
buffer and detailed information on the
selected event
To find the cause of a CPU STOP and
evaluate the events on the selected
module leading to it
Using the diagnostic buffer, errors in the
system can still be analyzed at a later
time to find the cause of a STOP or to
trace back and categorize the occurrence
of individual diagnostic events
Diagnostic Interrupt Diagnostic data for the selected module To evaluate the cause of a module fault
DP Slave Diagnostics Diagnostic data for the selected DP slave
(to EN 50170)
To evaluate the cause of a fault in a DP
slave
Memory Memory capacity. Current utilization of
the work memory, load memory and
retentive memory of the selected CPU or
M7 function module
Before new or extended blocks are
transferred to a CPU, to check whether
sufficient load memory is available in the
CPU/function module or to compress the
memory content.
Scan Cycle Time Duration of the longest, shortest, and last
scan cycle of the selected CPU or M7
function module
To keep a check on the configured
minimum cycle time, and the maximum
and current cycle times
Time System Current time, operating hours, and
information about synchronizing clocks
(synchronization intervals)
To display and set the time and date of a
module and to check the time
synchronization
Performance Data Address areas and the available blocks
for the selected module (CPU/FM)
Before and during the creation of a user
program to check whether the CPU fulfils
the requirements for executing a user
program; for example, load memory size
or size of the process image
Blocks
(can be opened from
the "Performance Data"
tab)
Display of all block types available in the
scope of supply of the selected module
List of OBs, SFBs, and SFCs you can use
for this module
To check which standard blocks your user
program can contain or call to be able to
run on the selected CPU.
Communication Transmission rates, the overview of
communication connections, the
communication load, and the maximum
message frame size on the
communication bus of the selected
module
To determine how many and which CPU
or M7 FM connections are possible and
how many are in use