OB86 troubleshooting answers
1 question with answers cited from the manufacturer manuals.
- 0S7-1500 OB86 Rack Error: PROFINET device keeps dropping off, why?
An OB86 Rack Error on a Siemens S7-1500 indicates a failure or return of a DP master system, PROFINET IO system, DP slave, or IO device. Unlike S7-300/400, the S7-1500 CPU defaults to staying in RUN mode if OB86 is not c…