No memory card

I recall having that exact same message.  It is misleading from my recollection.

I had to update some firmware on an add-on plc module, thermocouple inputs to be exact.  I had to update all my FW rev 1.0 to I think FW 1.1 to get the errors to permanently go away in a few cases.

I had to factory reset, re-apply the firmware, and download the plc program in a couple others.

On one, I had a bad electrical connection.

On one, I had a bad RJ45 connection.  If I plugged into one port, it would run for a long time, If I switched it, for whatever reason, it would intermittently fault out, usually after some "likely" mechanical bump, like someone dropping something heavy near the control cabinet holding the plc.

Factory reset, reapply firmware, download plc program.  While doing all that, look for stray wire strands, loose or misapplied terminal connectors, or obvious wiring problems that rarely if ever would show up until the temperature or pressure around the plc changed more than 10%.

After all these issues, we started requiring external terminals rather than doubling up wiring on the s7-1200 connector slots for the wires.  We also made sure every wire had a proper ferrule crimped on.  Our s7-1200 troubleshooting has gone to zero post commissioning and during commissioning, they get going much more quickly as well. 

baximester

Hello!

I use CPU1214 without external memory card.

When I switch off the machine in the weekend for 2 days, and switch on it goes to stop with fault very often.

In the diagnostic notes the fault message: "memory cards type: No memory card, CPU changes from NO POWER to STOP mode."

Have you got somebody such an experience, or any idea?

Thanks