Diagnostics - Siemens SIMATIC S7-1500 System Manual

System overview
4.3 S7-1500 R/H-CPUs
4.3.5

Diagnostics

All levels of automation in the S7‑1500R/H redundant system have integrated diagnostics. All
SIMATIC products have integrated diagnostic functions that you can use to analyze, localize
and log faults and errors efficiently.
System diagnostics is integrated into the firmware of the CPUs and works independently of
the cyclic user program. Faults in the plant are immediately detected and reported on the
display devices.
A uniform display concept visualizes error messages as plain text information over:
• TIA Portal
• HMI devices
• CPU displays
Displaying faults in an IO device
The various components of the S7‑1500R/H redundant system are connected over
PROFINET/Industrial Ethernet (IE). The devices detect faults in their modules (for example IO
device ET 200SP) and send diagnostics data to the assigned CPU. The CPU analyzes this
diagnostic information and notifies the connected display media. The information analyzed is
shown in graphic form in the configuration and programming software (TIA Portal), on the
HMI devices and on the CPU displays.
Figure 4-22 Overview of system diagnostics in a plant
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S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD