Premise: I have two package managed with 2 identical CPU , programmed in the same Step 7 project, let say Line 5  and Line 6. Both are programmed with CFC package. Some of the I/O is done with MTA.

When I take out a card on a Line 6 rack the system goes on as it should supposed to do: it gives a diagnostic message on HMI and the rack to which the extracted card belongs works fine.

The strange is that when I do the same operation on Line 5 the rack to which belongs the exctracted board goes in fault and a loose all the cards on that rack. On the cabinet I have three racks and this happens to all the racks, not only in one of them, so I suppose that it is a mistake or in CPU configuration or in the proper OB not loaded. I checked the Line 5 and 6 CPUs configuration and they are the same, with the excption of OB87 priority. But this OB in not loaded so i think that it does not matter. And both CPUs have the same OBs loaded

Is anyone here can give me some advice? I attach below the CPU diagnostic Buffer that unlikely is in Italian language :

[snip]

Hello,

You shouldn't remove the memory card while the CPU is in RUN mode.

Why must you never remove a memory card when the S7-300/S7-400/S7-1200/S7-1500 CPU is in operation (RUN)?

vebernasconi

I have ET200M rack with hot insertion module. It is manufactured by Siemens to make the insertion and disinsertion in hot mode and I will have never esperienced trouble like this. But I naver used before MTA,

Hi,

 Hot swapping feature for ET200M by means of active bus units is only for the ET200M modules not for memory cards.

Ayman Elotaify

 

vebernasconi

I have ET200M rack with hot insertion module. It is manufactured by Siemens to make the insertion and disinsertion in hot mode and I will have never esperienced trouble like this. But I naver used before MTA,

Hi,

 Hot swapping feature for ET200M by means of active bus units is only for the ET200M modules not for memory cards.

 Sorry, I did not myself clear. The problem is on the boards on the ET200M rack. I do not pull out memory cards, but AI, AO, DI and DO boards on ET200M.