I am upgrading an existing 540 to a 3350, both version 9. I can connect (using a serial cable) to the 3350 but not to the 540. I am using Siemens Manager E version 10. The weird thing is that I can connect to the 540 using Manager C version 9. Any help would be much appreciated.
Dave

should be no difference. what do you get when you try to connect.
have you checked the baud rate set in the manager e and manager c, are they the same?

Spot on it was the baud rate. Thanks for your help