Overview
Topic Detailed information Called via Additional information
Diagnosing 
hardware
Quick view: icons indicate 
operating status or module 
status. 
PLC > Diagnostics/
Setting > Hardware 
Diagnostics
Then, Module 
Information > Update:  
F5‑key 
Online help for 
STEP 7
, 
topic: "Hardware 
diagnostics and 
troubleshooting"
You can find information 
on this in the section 
"Module information 
(Page 112)".
Additional information: 
Double-click on the icon 
Module 
information
Use this menu command to 
read out information on the 
selected module.
Select CPU or CP:  PLC 
> Module information
Online help for 
STEP 7
, 
topic: "Hardware 
diagnostics and 
troubleshooting"
You can find information 
on this in the section 
"Module information 
(Page 112)".
Operating mode Displays the operating mode 
of the current module (RUN, 
STOP).
This requires an online 
connection to the CPU.
Select CPU or CP:  PLC 
> Module information
 
Time Checks/sets time of day  Select CPU: PLC > 
Diagnostics/Setting > 
Set Time of Day
Online help for 
STEP 7
, 
topics "CPU Clocks with 
Time Zone Setting and 
Summer/Winter Time" 
and "Using the Clock 
Functions" 
Faults on 
PROFIBUS
● Faulty bus segment
● Distance of an error 
location from the 
diagnostics repeater
Select master system: 
PLC > PROFIBUS 
Node Diagnostics, 
Monitor/Modify Node
Online help for
 STEP 7
, 
topic "Topology display 
using diagnostics 
repeaters"
All installed 
authorizations
(Versions of 
installed 
components)
● Products (name, 
version, release)
● Components (name, 
version, release)
● Firmware updates
● DLLs (STEP 7‑DLLs, 
Windows DLLs)
Help > About > 
"Display" button
Online help for
 STEP 7
, 
topic "Installed SIMATIC 
software"
Diagnostics in PCS 7
7.18 Diagnostic tools
Service support and diagnostics (V8.0)
110 Service Manual, 03/2012, A5E02779775-02