Comunication problem between two S7 400 F/FH

Hi to all,

Im woking on two F/FH systems (CPU 412-5 H PN/DP 6ES7 5HK06-0AB0 V6.0), where were already exist a safe comunication between theese two PLC's.

What i did, it's been just add another comunication task for exchange more variables, after i've downloaded the software and the connections again, i got a strange error.

In the BMS, who send the information all seems to be ok no error code in the RET_VAL, and i can monitor the block as well.

In the BCS instead, who receive the informations, i got a strange problem.

In the RET_VAL i didn't got any error, but when i try to monitor the block i got this error:
"IO Block cannot be watched" and the explanation sayd:

"You can only monitor IO that represent an address in CPU memory"

Any suggest?

Does anyone know how can i fix it?

I'm either looking for some safe comunication manual, but without success.

Thanks in advance

Regards

Duccio.

Hi guys,

I've uploaded another attachement, any suggest?

Regards.

Duccio