S5 115u To Wincc Link

I HAVE PROBLEM WITH A LINK BETWEEN S5 115U PLC WITH A 943 PROCESSOR LINKED TO A WINCC SCADA SYSTEM RUNNING ON V6.0. I AM EXPERIENCING COMMS FREEZING UP AND THE SCREEN ON THE WINCC STOPS WORKING. THE PLC THEN HAS TO BE RESTARTED TO ENABLE COMMS AGAIN. THIS COMMS FREEZE HAPPENS AT ODD INTERVALS ANY TIME BETWEEN 1 DAY TO 4 DAYS. THE CALL TO THE SEND AND RECEIVE FB'S IS DONE IN OB1.

HAS ANYONE ELSE EXPERIENCED SUCH A PROBLEM ? IF SO IS THERE A SOLUTION ??

IF YOU NEED MORE INFO PLEASE LET ME KNOW.

SURJIT

you need to be more experienced to sort and deal with this problem