Step 7 Special Diagnostics; Overview - Siemens S7-300 Configuration Manual

STEP 7 special diagnostics

The STEP 7 special diagnostics (special diagnostics / NCM S7 Diagnostics) described here
provides dynamic information on the operating state of the communication functions of online
CPs.
This chapter provides a general overview of the individual diagnostic functions.
The following checklist will help you to recognize several typical problems and their possible
causes and shows how you can use the STEP 7 special diagnostics tool to remedy the
situation.
● When you are working with the diagnostic tool, the integrated help system provides you
12.1

Overview

Diagnostics options in STEP 7
STEP 7 provides you with a graded concept allowing you to query information about the
status of your SIMATIC S7 components and functions and to sort out problems in a variety of
different situations. You will find:
● Hardware diagnostics and troubleshooting with STEP 7
● Communication diagnostics with STEP 7 special diagnostics
● Diagnostics of the communication and the status of modules of an S7 station
● Diagnostics of security-relevant data with SCT online diagnostics
Configuring and commissioning S7 CPs for Industrial Ethernet
Configuration Manual, 09/2013, C79000-G8976-C182-13
with contextrelated support.
Note
STEP 7 special diagnostics supports not only diagnostics for CPs (communications
modules) but also other module types such as the IE/PB Link. In the sections below, the
term CP is therefore synonymous with all modules with which you can run NCM S7
diagnostics functions.
Hardware diagnostics provides dynamic information on the operating mode of modules
including CPs when the S7 station is online.
You can recognize the existence of diagnostics information for a module based on the
diagnostics icons. Diagnostic icons show the status of the corresponding module and
also the operating mode of CPUs.
The STEP 7 special diagnostics described here provides dynamic information on the
operating state of the communications functions of online CPs or modules.
For details, see section Web diagnostics (Page 167)
The SCT online diagnostics via HTTPS provides dynamic information about security-
relevant data of online security CPs or modules. You will find more detailed information in
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