Applicable Systems
S7-1200
S7-1500
S7-300
S7-400
LOGO!
SINAMICS
Symptoms
PROFINET/PROFIBUS bus fault LED blinking.
Possible Causes
Network cable disconnected, device not reachable, or configuration mismatch.
Troubleshooting Steps
Check network cables, verify device names/IP addresses, check PROFINET IO configuration.
How to Reset
Fix network and restart
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Source: Siemens S7-1200/1500 system diagnostics
Category: PLC & VFD
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