Hello,
EX290 is not a PLC but an X2X bus controller for System 2003 product line. The PLC would be something like CP474 or CP476.
To connect to the PLC, you need a straight RS232 cable and a program called PVI Transfer.
You can download it for free here:
http://www.br-automation.com/cps/rde/xchg/...10_ENG_HTML.htmYou can use this program to download the logbook (error log) from the PLC.
Automation Studio is used for development or maintenance. You only need if you are going to program the PLC.
If you are sure the problem is with EX290, you need to look at the LEDs. They are described in the datasheet.
http://www.br-automation.com/cps/rde/xchg/...29_ENG_HTML.htmEX290 has no programming of its own.
If all else fails, please contact B&R technical support at the link below.
http://www.br-automation.com/cps/rde/xchg/...40_ENG_HTML.htm