Effects Of A High Network Load - Siemens SIMATIC S7-1500 Manual

Diagnostics
7.3 Troubleshooting
Procedure
To view the MicroPython debug messages via web server, follow these steps:
1. Connect a programming device with an IP address in the same subnet to the TM NPU via
Ethernet.
2. Start the TM NPU.
The web server starts.
3. On the programming device, call the following website: "http://[IP address of
the TM NPU]/index.html".
The IP address of the TM NPU is the address specified in the configuration file
"network.conf".
The start page of the web server is displayed.
Writing service data to SIMATIC Memory Card
This method is reserved for service technicians.
If you are using a programming device, it is possible to write the service data to the folder
/service data on the SIMATIC Memory Card by writing the data record Idx 1990.
7.3.5

Effects of a high network load

Too much traffic on the Ethernet interface of the module can limit the module function as
follows:
• Very long response times
• No response of the module
• Error when accessing the:
– SIMATIC Memory Card
– FTP client
An overload on the Ethernet interface can be recognized from the value status bit of the
process image input -> it changes to "0".
You can find more information on the value status bit in section Status and error information
in the process image input (PII) (Page 28).
Checking the network connection
If limitations occur in the module function or response, check the module:
1. Restart the module.
2. If the error behavior persists, check the network for unusually high network
communication or Ethernet requests to the module. Ethernet requests also include high-
frequency requests to the web server of the module.
More information
You can find more information on the use of the Ethernet interface in section Module-specific
security information (Page 8).
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Technology Module TM NPU
Equipment Manual, 07/2023, A5E46384784-AC