Problem with struct data in FC (Simatic)

Hello,

I have an FC with follwing code in the beginning of the block:


The struct MEM_AREA has 5 countintegers and then the MEMBITS word. When I delete this peace of code, the counterintegers don't give problems, but when the code is running, the counterintegers are messed up.



How is this possible, that COUNT_VAL_1 gets messed up (overwritten with something) ?

Thanks,

Kind regards,
G

Found

Found,

I was loading an IN/OUT area in the adress register... i changed my code to this:

L #MEM_AREA.MEMBITS
T #TEMP_MEM_AREA

L P##Membits
LAR1
L #TEMP_MEM_AREA
T W [AR1,P#0.0]


Loading an In/OUT after the LAR1 messes up the AR1, didn't know that...

Regards,
G

It is the fact that you are accessing a parameter that has a structure, not that it is an IN/OUT.