MODBUS TCP communication suddenly crashes on Operator 7.60 Plc ABB AC500

<div>HI All,&nbsp;</div><div><br></div><div>I'm using operator 7.60 (ABB version)&nbsp; with ModRtu32&nbsp; in TCP/IP to a ABB AC500 cpu.</div><div>I'm able to write and read some bit and word, but after few seconds the comunication breaks down and restarts automatically in a continuous loop.</div><div>The PLC CPU is running ok, I'm sure because there is another SCADA panel (IX developer) connecting and working on the same PLC CPU (setted to manage 12 connections).<br><br><br></div><div>Any idea how to debug this strange behaviour?&nbsp;<br><br>Thanks in advance</div><div><br><br>Federico</div><div></div>